2024-03-29T15:32:41Z
https://ejournal.undip.ac.id/index.php/index/oai
oai:ojs.ejournal.undip.ac.id:article/8934
2020-04-17T20:12:05Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PENGARUH PANJANG SALURAN TRANSMISI TERHADAP TEGANGAN LEBIH TRANSIENT YANG DISEBABKAN KARENA PROSES ENERGIZED PADA SALURAN TRANSMISI 500 KV
Yuniarto, Yuniarto
PSD III Teknik Elektro
Yuniarto, in this paper explain that the utility of high transmission line result in the transient over voltage in transmission-line will also increasingly higher, mainly for lightning and switching surge. Switching surge is a dominant factor to show up much transient over voltage in the transmission-line in the level of 230 kV or higher, if it is compared with lightning surge. Switching surge is caused by single energized process, the process itself to energize a transmission line in no load condition with energy power through switch closure operation. The research was aiming at observing the influence of transmission-line length to transient over voltage that occurred at the energized process in 500 kV transmission line Ungaran-Pedan, which used EMTP (Electromagnetic Transients Program) to simulate it. The result of simulation showed that the transient over voltage occurred along the transmission-line which caused the higher voltage increase, providing that the line is also longer.
Key word : over voltage, transient, EMTP
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8934
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/19151
2020-04-17T20:15:36Z
gema_teknologi:ART
"180430 2018 eng "
2656-582X
0852-0232
dc
PROTOTYPE GROUNDING DETECTOR PADA GROUND CLUSTER DENGAN SISTEM INTERLOCKPADALBS (LOAD BREAK SWITCH) BERBASIS ARDUINO MEGA 2560 DENGAN TAMPILAN HMI (HUMAN MACHINE INTERFACE)
Pasaribu, Bambang Handoko
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Arduino Mega; Ground Detector; OCR relay; Voltage Sensor;
Electricity has become a daily necessity in the community both social, economic and business. Therefore electricity is needed every day and it is the reliability of PLN. To fulfill such reliability While the reliability of electrical energy should be followed by inspection on the equipment used. PLN field employees themselves who every day always do inspection on the network of all the repeaters, so that field officers always know the state of the network in the field. If the network looks bad or requires maintenance it will be scheduled to do the job. Before the holding of the work it will be done in the first outage area is to operate the switching tool didaerah area. The switching tools are ABSW and LBS. After all the swithing tools are operated the workers always do the grounding first on the three phases by using ground clusters at the starting point to the end of the work where if transmitted so called PMS ground. This is done as a safety because the LBS switching tool is closed so that workers are not sure if the network has been extinguished and as a safety if LBS failed to work or failure. But here the worker himself sometimes still not sure whether the ground cluster is already installed properly or not. And as a safeguard against the occurrence of any maneuvering done by employees from the office Rayon. Therefore the author wants to make a prototype to detect whether grounding is installed properly or not in every phase. The prototype uses Arduino mega as its micron and uses a voltage sensor to find out the value of the voltage. If the ground claster is installed and work fails on LBS then the OCR relay will work and PMT will trip. With the prototype is expected to improve security in the work and minimize the occurrence of work accidents. This prototype has a 0% chance of a crash if the ground cluster is properly installed.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/19151
Gema Teknologi; Vol 19, No 4 (2018): October 2017 - April 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21866
2020-04-17T20:14:44Z
gema_teknologi:ART
"170430 2017 eng "
2656-582X
0852-0232
dc
SISTEM PENGENDALIAN SUHU DAN PEMANTAUAN KELEMBABAN BIJI KOPI PADA MESIN PENYANGRAI BERBASIS ARDUINO 2560
Permana, Anggi
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Arduino MEGA; heat element; DHT11 sensor; MLX90614 sensor; 7-segment;
Anggi Permana, Iman Setiono, in this paper explain that along with the development of modern times. Technological advancements were increasingly found in manufacturing products, everything was done to be easy and practical. These products are made with the aim of helping human work. However, not all manufacturing products are automated. Some products still work manually. Therefore, we are required to be able to innovate by changing the manual process with a more efficient method by using products that are automatic. One tool is the roasting machine for coffee beans. Currently on the market it is rare for automatic coffee roasters to be designed. Most coffee roasters are done manually, use hand mixers, and use wood stoves or gas stoves. This situation becomes less efficient where the roasting is still using the hands, causing it to ripen evenly and burn. Though to get the right coffee is from the roasting process. Roasting determines the color and variety of flavors of coffee to be consumed. The effect of temperature and time also affects the results of roasting, even when roasting here we monitor the thickness of coffee beans. to produce good roasting. The principle is to give the right amount of time and the right temperature so that coffee will not only have a fragrant aroma but also create the right taste. To solve the problem, in this article we made coffee bean roasters. This coffee bean roasting system is based on Arduino MEGA type 2560. The roasting process uses the mlx90614 sensor and DHT11 sensor to monitor the moisture of coffee beans that will be displayed on the 7-segment. The heating media used is using heat elements instead of stoves. This tool is able to roast as much as 400 grams of coffee. It is expected that the roasting machine of coffee beans will be more optimal
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21866
Gema Teknologi; Vol 19, No 2 (2017): October 2016 - April 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21932
2020-04-17T20:13:12Z
gema_teknologi:ART
"151031 2015 eng "
2656-582X
0852-0232
dc
PENGOPERASIAN RFID SEBAGAI OPERATING USER PARKING AREA DENGAN METODE ELEKTRONIK PARKING PRICING (EPP) BERBASIS ARDUINO UNO
Wijayanto, Ari
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Sasmoko, Priyo
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Ari Wijayanto, Priyo Sasmoko, in this paper explain that for operation RFID Parking Area User Operating Method Electronic Parking Pricing ( EPP ) Based Arduino Uno we created to see the problems that occur at this time , where the application of the parking area where the management is still done manually, especially in terms of payments .. We design a tool capable overcome these weaknesses , ranging from providing information about the availability of parking space to the user before entering the parking area to the effectiveness of the method of payment , which uses an identity card balance . With this tool is expected to reduce queuing/ speed up queues of vehicles wanting to enter / exit the parking lot. The system is also supported by the Arduino Uno as the brain to process data from RFID . RTC components to calculate the time and date , LCD display , and a servo motor as the driving door portal. Infrared to close the portal and counting vehicles entering and exiting.
Keywords : RFID, Operating User Parking Area, EPP, Arduino Uno
References
• Malvino. 1995. Prinsip-prinsip Elektronkasi. Jakarta : Erlangga.
• Van Vlack. Lawrench, Ilmu dan Teknologi Bahan, Erlangga, hal 186
• Djuaji, Very. 2011, Pengenalan Arduino. hal.9
• Finkenzeller Klaus, 2010, RFID Handbook, 319
• Elektuur, B.V. 1986. 301 Rangkaian. Diterjemahkan oleh: Ignatius. Jakarta: Elex Media Komputindo.
• Tri, 2014 Metode Penulisan Karya Ilmiah, Bandung: Kelompok keahlian Ilmu Kemanusian Institut Teknologi Bandung.
• Jogiyanto, 2003, Konsep dasar Pemrograman Bahasa C, Yogyakarta: Andi.
• Annonimous. 2012. Mengenal Arduino UNO. Diunduh dari http://www.sahabat-informasi.com/2012/07/mengenal-arduino-uno.html pada 25 mei pukul 20.02 WIB.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21932
Gema Teknologi; Vol 18, No 3 (2015): April 2015 - October 2015
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/319
2020-04-17T20:06:36Z
gema_teknologi:ART
"101023 2010 eng "
2656-582X
0852-0232
dc
KOMPETENSI PROGRAM STUDI DIPLOMA TEKNIK PERKAPALAN DALAM INDUSTRI MARITIM INDONESIA
Ridwan, Mohd
Yulianto, Eko
Mohd Ridwan, Eko Yulianto, in paper competency of naval architecture diploma program on Indonesian maritime industry explain that Shipbuilding engineering professionals is part of the leading maritime industry is expected to become the motor of development of national maritime fleet in the implementation of cabotage (Impres No.5, 2005), this will reduce foreign exchange spending nearly 99 trillion rupiah per year due to the use of foreign fleets, and the creation of new jobs as a supporter of the maritime industry. So the presence of workers who have competence in the field of shipbuilding (ship building, naval architecture, marine engineering enginerring and maritime transportation) is urgently needed and their capability to compete with other countries that previously controlled the sea as a source of national income should be the Indonesian government's attention. Keywords: Professional shipbuilding techniques, competency
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/319
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21633
2020-04-17T20:16:27Z
gema_teknologi:ART
"190430 2019 eng "
2656-582X
0852-0232
dc
STUDI PERANCANGAN PROPULSI KAPAL PETI KEMAS 100 TEUS
Utomo, Budi
Program Studi Diploma III Teknologi Perencanaan dan Konstuksi Kapal, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro
Khristyson, Samuel Febriary
Program Studi Diploma III Teknologi Perencanaan dan Konstuksi Kapal, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro
Designing; Propultion; Container ship;
Transportasi laut menjadi penghubung kebutuhan dan perekonomian antar pulau di Indonesia, daya angkut dibuat seoptimal mungkin untuk dapat menyuplai kebutuhan masyarakat. Kapal yang ditinjau adalah jenis kapal barang peti kemas. Perencanaan bentuk lambung kapal dipengaruhi oleh beberapa faktor diantaranya adalah dari segi kegunaan kapal yang akan dibangun. Dari perhitungan hambatan dapat diketahui berapa Trust Horse Power sehingga dapat digunakan untuk menghitung efisiensi propulsi kapal. Kapal harus memiliki propulsi untuk melawan seluruh hambatan yang mungkin terjadi pada lambung kapal. Dari hasil analisis kapal barang peti kemas dengan kapasitas 100 teus memiliki daya mesin sebesar 1530 HP dengan sistem penggerak ganda dengan peletakan kamar mesin berada di belakang kapal. Tipe baling-baling yang di rencanakan adalah fixed pitch propeller B - 4. 40 , dengan bahan material bronze . Ukuran pitch daun baling-baling 1650 mm dengan diameter baling-baling sebesar 1850 mm.
Vocational School Diponegoro University
2019-05-13 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21633
Gema Teknologi; Vol 20, No 2 (2019): October 2018 - April 2019
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/4708
2020-04-17T20:08:06Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PENGARUH SUHU BAHAN BAKAR TERHADAP KEPERLUAN BAHAN BAKAR PADA MOTOR DIESEL SATU SILINDER 20 HP DENGAN ELEKTROLISER
Sutomo, Sutomo
Program Studi Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Murni, Murni
Program Studi Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Rahmat, Rahmat
Program Studi Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Sutomo, Murni, Rahmat, An internal combustion process of fuel will works effectively if the fuel’s density and viscosity is lower so we would like to use a heater in order to decrease the density and viscosity of the fuel. Based on this condition, we would like to use an electrolizer and a diesel engine to improve the fuel consumption. Electrolizer will increases the gas reaction so we hope that fuel consumption rate will decrease.
The result of this research is the effective temperature of fuel is 50oC – 60oC will produce the effective combustion. The fuel consumption decreased in 6 kW is 0.12 lt/kWH.
Key word: diesel engine, electrolizer, temperature
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4708
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/26017
2020-06-05T08:41:35Z
gema_teknologi:ART
"200430 2020 eng "
2656-582X
0852-0232
dc
EVALUASI TATA KELOLA TEKNOLOGI INFORMASI PADA RUMAH SAKIT DR. H. IBNU SUTOWO BATURAJA BERDASARKAN FRAMEWORK COBIT 5
Sukmawati, Ade
Teknik Informatika, Universitas Bina Darma
Cholil, Widya
Teknik Informatika, Universitas Bina Darma
Rizal, Syahril
Teknik Informatika, Universitas Bina Darma
Evaluation; Cobit 5; IT Governance
Control of information technology governance at this time is very influential for the organization in achieving its strategic objectives. Technology has become an important part in supporting a service, including in Dr.H. Ibnu Sutowo Baturaja. The hospital has SIMRS in supporting its services. So that governance should be well planned. This research was conducted to evaluate the management of information technology that supports the SIMRS. The results of this study are to find out the value of the level of maturity in Dr. H Ibnu Sutowo Baturaja. Evaluations were carried out using the standard COBIT 5 measurement framework. The focus of this study was the domain of Ensure Resource Optimization (EDM01), Manage the IT Management Framework (APO01) (APO07), Build, Acquire and Implement (BAI04) and Monitoring, Evaluation and Access (MEA01).
Vocational School Diponegoro University
2020-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/26017
Gema Teknologi; Vol 20, No 4 (2020): October 2019 - April 2020
eng
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/download/26017/0
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8808
2020-04-17T20:09:45Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
PERBANDINGAN PENGARUH PENEMPATAN ARRESTER SEBELUM DAN SESUDAH FCO SEBAGAI PENGAMAN TRANSFORMATOR 3 PHASA TERHADAP GANGGUAN SURJA PETIR DI PENYULANG PANDEAN LAMPER 5 RAYON SEMARANG TIMUR
Wardana, Azis Nurrochma
PSD III Teknik Elektro Undip
Subari, Arkhan
PSD III Teknik Elektro Undip
Azis Nurrochma Wardana, Arkhan Subari, in paper comparison of the effect of placement arrester before and after FCO as safety of 3 phase transformator from interruption of lightning at Pandean Lamper 5 Feeder, East Semarang explain that problem of the studied is location of arrester at distribution which have is same function and target but owning location of different arrester. Location of arrester relate to wiring of arrester with transformer and fuse Cut Out (FCO) owning target to give protection at transformer of over voltage. In the last location of this arrester require to study again about its efficacy of its at transformer. Efficacy of pr otection at such transformer is efficacy of passed to protection is transformer by minimizing over voltage that happened at the transformer so that equipments and transformer which its of him do not experience of damage. By considering factor influencing the level of voltage of surge and current of surge that happened at each system, like wiring of arrester, length of wire, apart arrester which is utilized in system location of arrester, steepness of wave come, speed creep waving surge, and Basic InsulationLevel (BIL) equipments, so that is in the final got one of location of correct arrester as 20 kV distribution transformer protection.
Keywords: Arrester, Distribution Transformer, Fuse Cut Out, Lightning Surge
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8808
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/17963
2022-06-21T07:53:00Z
gema_teknologi:ART
"210430 2021 eng "
2656-582X
0852-0232
dc
ANALISA KINERJA CNG COOLER PADA SISTEM CNG PLANT
Darmanto, Seno -
Program Studi Rekayasa Perancangan Mekanik Sekolah Vokasi, Universitas Diponegoro
Fahrudin, Muhammad
Program Studi Diploma III Teknik Mesin, Sekolah Vokasi, Universitas Diponegoro
CNG; CNG Cooler; CNG Plant; heat exchanger; temperature
CNG Cooler is a heat exchanger in CNG Plant System which has function to reduce CNG temperature. CNG (Compressed Natural Gas) is natural gas which compressed by gas compressor from normal pressure up to certain high pressure. CNG Plant is gas storage and supply facility for PLTGU when it work at peak load hours. CNG Cooler reduce temperature of CNG which out from gas compressor before saved in storage utility which purpose to avoid over heating in the next process, increase durability of the next process utility, and make gas storage utility design easy.
Vocational School Diponegoro University
2021-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/17963
Gema Teknologi; Vol 21, No 2 (2021): October 2020 - April 2021
eng
Copyright (c) 2021 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8918
2020-04-17T20:10:56Z
gema_teknologi:ART
2656-582X
0852-0232
dc
IMPLEMENTASI ARM MANIPULATOR DAN SENSOR WARNA DALAM PROTOTYPE OTOMATISASI SISTEM PENYORTIR BOX BERWARNA BERBASIS MIKROKONTROLLER AVR ATMEGA 8535
Wibowo, Roby Adi
PSD III Teknik Elektro
Subali, Subali
PSD III Teknik Elektro
Roby Adi Wibowo, Subali, in paper implementation of ARM manipulator and color sensor in prototype of color box sorter automation system based on microcontroller AVR ATMega 8535 explain that the rapid development of technology at all times encourage people to overcome problems that arise around it. With a view to facilitate the work and time efficiency. Included in the field of automation control systems in a work process. One of these systems automation in sorting colored box, so that a product can be separated from one another and in accordance with the qualifications color. In this final task will be made a colored box sorter automation system using the color sensor as a detector and a manipulator arm actuator to take the box to place each color.
Keywords; Arm manipulator, colours sensor
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8918
Gema Teknologi; Vol 17, No 2 (2013): October 2012 - April 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8979
2020-04-17T20:12:57Z
gema_teknologi:ART
"150401 2015 eng "
2656-582X
0852-0232
dc
STUDI KASUS KEHILANGAN KVARH PELANGGAN TARIF I-2 DENGAN DAYA 16.500 VA DAN 17.600 VA DI PT PLN (PERSERO) AREA SEMARANG
Kartikaningtyas, Arni
PSD III Teknik Elektro
Ariyanto, Eko
PSD III Teknik Elektro
Arni Kartikaningtyas, Eko Ariyanto, in this paper explain that In electric power transmission and distribution, volt-ampere reactive (var) is the unit used to measure reactive power into AC electric power system. Reactive power in AC circuits when current and voltage are not in phase. Is a true symbol and Var, var, or VAR, but all three terms are widely used. Var terms proposed by Romanian Constantin Budeanu electrical engineer and was introduced in 1930 by the IEC in Stockholm, which has been adopted as a unit for reactive power. Var can be regarded as both the imaginary part of the apparent power, or the power flowing to the load reactive, where voltages and currents specified in volts and amperes. Two definitions are equivalent. Reactive power into the power unit kVArh is used by passive components beyond resistor which is a power loss or power that is not desirable. This power to a minimum to avoid, or at least minimized, although it will not disappear altogether, by minimizing the power factor. Industrial customers are groups of customers with the use of induction machines used for the induction process that requires a great power to drive the motor and pull out the reactive power usage needs to be taken into account. Customers I 2 is the class of tariffs for industrial purposes being at low voltage with power above 14 kVA to 200 kVA. Keywords: VAR, customer Industry.
Vocational School Diponegoro University
2015-08-21 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8979
Gema Teknologi; Vol 18, No 2 (2015): October 2014 - April 2015
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21224
2020-04-17T20:16:23Z
gema_teknologi:ART
"181031 2018 eng "
2656-582X
0852-0232
dc
HIDROLISA KOLAGEN DALAM CEKER AYAM HASIL PERENDAMAN DENGAN ASAM ASETAT PADA PROSES PEMBUATAN GELATIN
Santosa, Herry
Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro
Abyor H, Noer
Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro
Guyana, Nurmy Lailati
Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro
Dwi Handono, Sigit Firman
Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro
gelatin; collagen; chicken claw; hydrolysis;
Herry Santosa, Noer Abyor H, Nurmy Lailati Guyana, Sigit Firman Dwi Handono, Gelatin is a chemical compound with molecular formula (C102H151N31O39)n in the form of a heterogeneous mixture of polypeptide obtained by collagen partial hydrolysis of animal binding tissue by acid or base treatment. Sources of gelatin production generally derived from cow bones, pig skins, fish scales or chicken bones. Gelatin is widely used in food and pharmaceutical industries because of its ability to form a thermoreversible gel, among others as a stabilizer on ice cream, capsule making materials and matrix for implants. The main objective of this research is to make gelatin with chicken claw based ingredients through the process of collagen hydrolysis. Specifically aims to determine the effects of acetic acid concentration on the collagen levels, determining the most influential variable between temperature and time on the hydrolysis process, as well as the assessment and determination of the optimum temperature or time in the hydrolysis process so as to approximate the criteria corresponding to the commercial gelatin characteristics, i.e gel strength (50-300 Bloom), viscosity (1.5-7,5 cP), and gelatin sensory properties. To answer that goal, the research is planned through 2 stages, namely the preparation stage, product creation, and gelatin flour characterization. The preparatory stage consists of cleansing, reduction of chicken claw and demineralization. The production stage consists of determining the most influential variables and the optimum variable variations (temperature and time) of the collagen hydrolysis process into gelatin flour based on the functional properties and gelatin sensory properties. The results of this research showed that the optimum concentration of acetic acid in demineralization was at a concentration of 1.5 N, the most influential variable was the temperature variable with a single effect average value - 5.05, the relatively good variable collagen hydrolysis was at 600 C and 4 hour.
Vocational School Diponegoro University
2018-11-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21224
Gema Teknologi; Vol 20, No 1 (2018): April 2018 - October 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21911
2020-04-17T20:13:46Z
gema_teknologi:ART
"160430 2016 eng "
2656-582X
0852-0232
dc
POWER BANK PORTABLE SOLAR CHARGER MENGGUNAKAN SISTEM BUCK-BOOST CONVERTER BERBASIS MIKROKONTROLER ATMEGA 32
Elfani, Nisrina Zahra
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Sasmoko, Priyo
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Nisrina Zahra Elfani, Priyo Sasmoko explain that portable electronic devices have a problem, namely the resistance of electrical energy intake, because these electronic devices get energy from batteries that have limited capacity to store electrical energy. Electronic objects that have now mushroomed and become primary needs such as cellphones and laptops desperately need a tool to recharge batteries. Solar energy can be used to recharge the gatget batteries by converting them to electric power. This will be very useful for those who are field workers, travelers, and nature lovers who need battery charging devices without having to use an adapter that uses an AC source from PLN grids in homes, while in certain circumstances gadget users may not be at home or in a place that provides ac resources. One solution to this problem is the use of a power bank portbale solar charger. Portable power bank solar charger is a charger that is equipped with backup batteries and solar cells as a source of electrical energy. Realized a portable charger that uses the working principles of DC-DC converter circuits such as: buck-boost converter, buck converetr and boost converter as a voltage regulator that is used to charge electronic devices. The ADC channel on the microcontroller is used as feedback for the controller that is also present in the microcontroller used so that the converter output can be maintained at a certain value through setting the duty cyle PWM that drives the converter. This portable power bank solar charger uses a buck-boost converter system and can produce the desired voltage. Buck converters can reduce the output voltage from 5 Volt dc for the use of chargering handphone and boost converter can increase the output voltage around 19 volts dc for the use of notebook charging
Keywords: powerbank, portable charger, buck-boost converter, solar cell
References
• Gunawan. 2009. Rancang Bangun DC-Dc Converter dengan PID Diskrit sebagai Pengendali Tegangan Keluaran. Skripsi. Depok : Fakultas Teknik, Program Studi Elektro, Universitas Indonesia.
• Handini, Wulandari. 2008. Performa Sel Surya Tersensitasi Zat Pewarna (DSSC) Berbasis ZnO dengan Variasi Pengisian dan Besar Kristalis Ti . Skripsi. Depok : Fakultas Teknik, Program Studi Elektro, Universitas Indonesia.
• Hidayat, Suryo, Muhamad. 2010. Rancang Bangun buck Boost Konverter. Skripsi. Depok : Fakultas Teknik, Program Studi Elektro, Universitas Indonesia
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21911
Gema Teknologi; Vol 18, No 4 (2016): October 2015 - April 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/22134
2020-04-17T20:07:42Z
gema_teknologi:ART
"110430 2011 eng "
2656-582X
0852-0232
dc
PENGELOLAAN KUALITAS UDARA DI PERKOTAAN
Suyanto, Hadi
Program Diploma III Teknik Kimia
Fakultas Teknik Universitas Diponegoro
Hadi Suyanto, in this paper explain that to avoid global warming and climate change effect, re-greening program at the open and dry area need to be established, this also to generate fresh temperature and improve health and comfort. Develop and enlarge green zone and public zone as part of air quality management that have social and environmental function, and not just as an esthetically function.
Keyword: Air Quality, re-greening
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/22134
Gema Teknologi; Vol 16, No 2 (2011): October 2010 - April 2011
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/1651
2020-04-17T20:07:25Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PENGARUH ELEKTROLISER TERHADAP KEPEKAAN BAHAN BAKAR PADA MESIN DIESEL 1 SILINDER 20 HP
Sutomo, Sutomo
Program Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Murni, Murni
Program Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Senen, Senen
Program Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Rahmat, Rahmat
Program Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Sutomo, Murni, Senen, Rahmat, Electrolyzer is development of a electrolysis technology to produce HHO gas, or Brown’s gas. Diesel engine use solar (diesel oil) as combustion’s material to produce thermal energy and oxidation and will be changed to mechanic energy. The base product of thermal energy by oxidation diesel oil, is would like to use electrolyzer to produce HHO and insert to the fuel combustion. Because HHO is a reactive gas, so in our research we hopeful will increase the thermal energy in combustion process and decrease the diesel oil consumption. The result of this research is the BSFC (Brake Shat Fuel Consumption) will decrease 2.5% up to 3.2%.
Key word: electrolyzer, diesel engine, BSFC
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/1651
Gema Teknologi; Vol 16, No 2 (2011): October 2010 - April 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/29560
2020-11-11T16:35:28Z
gema_teknologi:ART
"200430 2020 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN SISTEM RACK IN DAN RACK OUT PMT OTOMATIS DI KUBIKEL 20 KV BERBASIS ARDUINO MEGA 2560 MENGGUNAKAN VTSCADA 11.2
Puteri, Ratna Azizah
Teknik Elektro Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
Str. Teknik Listrik Industri Sekolah Vokasi, Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=_PO4HH0AAAAJ http://orcid.org/0000-0002-0425-0619
Tadeus, Dista Yoel
Str. Teknik Listrik Industri Sekolah Vokasi, Universitas Diponegoro https://scholar.google.co.id/citations?user=nHnjf2wAAAAJ&hl=id&oi=ao
automation; circuit breaker; rack in; rack out; PMT; VTSCADA; Arduino Mega
The 20 KV PMT (Circuit Breaker) is an important equipment for the reliability of electricity distribution. Therefore it must be maintained so that it is always in good condition with regular maintenance. Prior to maintenance, PMT is terminated from the bus bar, which is called the rack out process. After maintenance, the PMT is reconnected with the bus bar, which is called the rack in process. Usually, 20 KV PMT rack in and rack out process in maintenance or disturbance is still using the manual method. The 20 KV PMT can only be racked in and racked out in one way, by turning the lever. The lever will rotate the bolt as a PMT rail. In the manual method, there is no system for monitoring the condition of the bus bar whether it is has electric-voltage or not. There is also no remote control that can rack in and rack out. So officers must ensure the conditions of PMT and bus bars are safe manually, before maintenance is carried out. This is quite troublesome and dangerous for officers. From these problems, in this research designed a system that could ensure the condition of the PMT and the bus bar was safe before the rack in and rack out process was carried out and could monitor and control the system remotely using SCADA. Rack-in and rack-out automation system using VT SCADA, using Ethernet Shield that has been connected with Arduino Mega. Ethernet is connected to a mini PC. The microcontroller pins will be connected to the relays that will turn or stop the motor. The rack in and rack out commands from VT SCADA will determine the rotation of the motor so that the PMT moves. The current sensor reads the current flow and detects interference. Interference detection will automatically make PMT Rack out. System testing shows that the process of racking out in a state of maintenance or disturbance can be carried out automatically controlled by VT SCADA. Current sensor works to detect the current flowing, so that it can detect PMT interference and perform automatic rack out. The rack-in process is also capable of being remotely controlled with VT SCADA. This makes it easier for officers to also become additional reliability of PMT in the 20 KV cubicle.
Vocational School Diponegoro University
2020-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/29560
Gema Teknologi; Vol 20, No 4 (2020): October 2019 - April 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4786
2020-04-17T20:09:19Z
gema_teknologi:ART
2656-582X
0852-0232
dc
APLIKASI TAPIS PELEWAT RENDAH LC (LOW PASS LC FILTER) UNTUK MEREDUKSI DISTORSI HARMONISA PADA LAMPU HEMAT ENERGI
Sasmoko, Priyo
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Subali, Subali
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Yuwono, Teguh
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Priyo Sasmoko, Subali, Teguh Yuwono, in this paper explain that harmonic (current or voltage) is one of the problems that has to be solved in electric power system, especially that caused by non-linear loads. Harmonic could cause bad impacts for the electric components that sensed it. It is almost certain that using of fluorescent lamp with electronic ballast or it is called energy saving lamp can cause harmonic in electric power system. Considering of the using of energy saving lamp is increased fairly fast as residence and office lighting, so it is important to analyze and solve the harmonic that caused by energy saving lamp. From the harmonic analysis, we can know the harmonic distortion caused by energy saving lamp. And there are some efforts to reduce such harmonic distortion by using a Low Pass Filter.
Keyword: power quality, harmonic, low pass filter.
Vocational School Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4786
Gema Teknologi; Vol 16, No 4 (2012): October 2011 - April 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/32923
2022-06-21T07:53:00Z
gema_teknologi:ART
"210430 2021 eng "
2656-582X
0852-0232
dc
PENGARUH RASIO BAHAN BAKU TEPUNG KOMPOSIT (UBI KAYU, JAGUNG DAN KEDELAI HITAM) PADA KUALITAS PEMBUATAN BERAS ANALOG
Pudjihastuti, Isti
Program Studi Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
Supriyo, Edy
Program Studi Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
Devara, Hafiz Rama
Program Studi Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
proximate analysis; analog rice; composite flour
The increase population affects an increase in total of consumption of Indonesian people towards rice, which encourages Indonesia to import rice. One of the alternatives that can be done is by using potential non-rice raw materials such as tubers. In this study, the raw materials for composite flour from cassava (Manihot esculenta), corn (Zea mays) and black soybeans (Glycine Sojo) were used, which are the basic ingredient for analog rice. The purpose of this study was to examine the effect of raw material composition on nutritional value (carbohydrate, protein, fat, water and ash content) analog rice compared to ordinary rice, examine the physico-chemistry (kamba density, water absorption and cooking time) of analog rice compare to paddy rice and also to define raw material composition and best temperature, organoleptic test covering color, aroma, texture and taste. The process of making analog rice consists of several stages of research, such as the stage of making composite flour, cooking the composite flour dough, making analog rice, drying analog rice and analyzing the results. The variables used were the ratio of flour composition and the effect of extrusion temperature. Based on proximate analysis on various compositions, obtained sample 5 (60% cassava flour, 15% corn flour and 25% black soybean flour) as analog rice with the best formulation. Based on the proximate analysis of the effect of temperature, the temperature was 75 °C as the optimum temperature for the extraction process. The results of the physical analysis of the best analog rice in this study showed that analog rice from a composite of cassava flour, corn flour and black soybean flour had a kamba density of 0.46 g / mL, a water absorption capacity of 60.52% and a cooking time of 46 minutes. In this sample, analog rice has a texture, aroma and appearance similar to rice in general, although analog rice from composite flour tends to have a savory taste arising from black soybeans.
Vocational School Diponegoro University
2021-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/32923
Gema Teknologi; Vol 21, No 2 (2021): October 2020 - April 2021
eng
Copyright (c) 2021 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8913
2020-04-17T20:10:30Z
gema_teknologi:ART
"121001 2012 eng "
2656-582X
0852-0232
dc
PENDETEKSI KETINGGIAN LEVEL AIR DENGAN TAMPILAN LCD BERBASIS MIKROKONTROLLER ATMEGA 8 SERTA LED BUZZER DAN SEVEN SEGMENT SEBAGAI PERINGATAN DINI KENAIKAN AIR PASANG (ROB) BERBASIS PROGRAMMABLE LOGIC CONTROLLER CP1E-E40DR-A
Rahardjo, Rizal Fauzan Adi
PSD III Teknik Elektro
Winarno, Heru
PSD III Teknik Elektro
Rizal Fauzan Adi Rahardjo, Heru Winarno, in paper water level detection based atmega 8 microcontroller with lcd display, led, buzzer and seven segment as early warning of post water (rob) increase based CP1E-E40DR-A programmable logic controller explain that as a result of the overflow of the tidal sea water in rural areas sriwulan sayung District of Demak , the tidal water easily entered into the residential area , which can be fatal if not in further tackle. Tidal flood has become commonplace in the area Sriwulan Sayung District of Demak . However , the longer the tidal flood is troubling and very disturbing society . So I took the initiative to create a miniature tidal flood prevention . Height of the water level of a river that flows directly into the sea will be detected by the sensor. The sensors will send data to the PLC and will be displayed by the seven segment . Further increase in the water level of the river will also affect the water level in the ditch homes residents . Height of the ditch water level is detected by the sensor which will send data to the PLC and then displayed by seven segment LCD and previously through the microcontroller atmega 8. The maximum height of the water level gutter will be marked with berbunyinya buzzer and LED life.
Keywords : Sensor , Seven Segment , Microcontroller Atmega 8 , LCD , LED, buzzer.
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8913
Gema Teknologi; Vol 17, No 1 (2012): April 2012 - October 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8929
2020-04-17T20:11:44Z
gema_teknologi:ART
2656-582X
0852-0232
dc
ANALISIS NILAI INDEKS KEANDALAN SISTEM JARINGAN DISTRIBUSI UDARA 20 KV PADA PENYULANG PANDEAN LAMPER 1,5,8,9,10 DI GI PANDEAN LAMPER
Arifani, Nur Indah
PSD III Teknik Elektro
Winarno, Heru
PSD III Teknik Elektro
Nur Indah Arifani, Heru Winarno, in this paper explain that interruption of electricity supply for customers is very disturbing activity. Interruption/outage that occurred in the distribution network led to the disruption of continuity of service. Lots and duration of outages at the feeder Pandean Lamper 1,5,8,9, and 10 at Substation Pandean Lamper observed by the authors to get a reliability index value. This observation aims to get the value of SAIFI and SAIDI in substation feeder PDL Pandean Lamper at 1, 5, 8, 9, 10 and compared with a standard value of PLN as a world-class company (WCC) is SAIFI = 3 time/customer/year, SAIDI = 1.66 hours/customer/year. Disorders due to components and equipment as well as the tree is the most dominant cause of the outage. To obtain this index takes a data rate of failure (λ), a long interruption (U) and the number of customers (N) as well as get other customer-oriented index values are CAIFI, CAIDI, ASAI, ASUI. The analysis showed that the reliability index value for the feeder SAIFI value of PDL 1, 5, 8, 9, 10 all have a lower index value of PLN standards. For the fifth feeder SAIDI value only feeder PDL 9 impaired outages longer than four other feeder with an index value of 1.78 hours/customer/year beyond the PLN standard. For those who do not fit the standard feeder PLN performed maintenance measures components, as well as the supervision of the disturbance and other animals.
Keywords: distribution network, continuity, blackouts, interruption, SAIFI, SAIDI, CAIFI, CAIDI.
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8929
Gema Teknologi; Vol 17, No 3 (2013): April 2013 -October 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8940
2020-04-17T20:12:32Z
gema_teknologi:ART
2656-582X
0852-0232
dc
MINIATUR PENGAMAN TOWER TERHADAP PENCURI BERBASIS MIKROKONTROLER ATMEGA8 MENGGUNAKAN SENSOR PIR (PASSIVE INFRA RED) DAN LIMIT SWITCH DENGAN SISTEM SCADA
Utami, Dyah Palupi
PSD III Teknik Elektro
Subali, Subali
PSD III Teknik Elektro
Dyah Palupi Utami, Subali, in this paper explain that information security is a very important thing, therefore we need a system that can identify the users who will be accessing an information system security. SCADA stands for Supervisory Control And Data Acquisition meaningful data acquisition and supervisory control according to the indication. SCADA is not a complete control system, but more focused on the level of supervision. Thus, SCADA is a software package that is positioned to hardware connected to the system, generally through a microcontroller. PIR sensors and touch sensors. Where the sensor will detect the presence of human presence and sends a signal to the microcontroller. Indicator lights and an alarm will sound. The microcontroller will send a signal to the PC. In this study, applied in the security tower using a computer to pengkontrolan system as well as a display monitor and a monitoring system security information on this tool. Safety and time efficiency into consideration in making this tool, where the use of an identification system is needed. This research is focused on developing the design and simulation of SCADA systems used in information security.
Keywords: tower, microcontroller, PIR sensors, SCADA
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8940
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21076
2020-04-17T20:16:06Z
gema_teknologi:ART
"181116 2018 eng "
2656-582X
0852-0232
dc
HUBUNGAN ANTARA MATA KULIAH FISIKA TERAPAN DALAM KONTRIBUSINYA TERHADAP MATA KULIAH KEAHLIAN PADA MAHASISWA PROGRAM DIPLOMA III TEKNIK ELEKTRO SEKOLAH VOKASI UNIVERSITAS DIPONEGORO
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Tadeus, Dista Yoel
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Applied physics; correlation; method of documentation;
Iman Setiono, Dista Yoel Tadeus, in this paper explain that physics is a branch of behavior and experimental studies. In studying the nature, physics uses mathematical language to model natural phenomena in a mathematical context. In physics research, mathematical abilities are needed as student’s initial abilities in solving Physics problems. This study aims to study the relationship between courses in applied physics and courses that are the basis of developing competencies. The method used is the method of documentation and analysis using quantitative descriptive. The object of this study was students for physics subjects from student learning outcomes of student KHS grades. The results obtained from an integrated analysis provide strong results between learning outcomes and the ability of other subjects.
Vocational School Diponegoro University
2018-11-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21076
Gema Teknologi; Vol 20, No 1 (2018): April 2018 - October 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21882
2020-04-17T20:15:17Z
gema_teknologi:ART
"171031 2017 eng "
2656-582X
0852-0232
dc
PEMBUATAN KWH METER DIGITAL 1 FASA BERBASIS ARDUINO MEGA 2560
Afria B, Muhammad Gifar
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Winarno, Heru
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
ACS 712 sensor; Arduino MEGA 2560; 1 phase digital KWH meter; Cosphi comparator; IC LM 393; IC EX-OR;
Muhammad Gifar Afria B, Heru Winarno, in general, a digital kWh meter that can be used to monitor the cosphi value is a 3 phase kWh meter. For 1 phase kWh meters it can only be used to monitor voltage and load usage. In this tool a 1 phase digital kWh meter prototype is made that can be used to monitor cosphi. Cosphi can be compared by comparing voltage and current signals using LM 393 IC. The reading results from IC LM 393 are compared with EX-OR IC so that high signal is obtained when voltage and current have phase difference only. The output of the EX-OR IC is inserted into Arduino to be read and calibrated so that it can be displayed on the LCD. for the process of reading the current magnitude used ACS 712 current sensor, while for the voltage sensor reading step down transformer is used with the principle of voltage divider. In this system, the Arduino MEGA 2560 microcontroller is used as a sensor reading processor that is programmed using the C ++ language so that it can be displayed on a 16x4 LCD. This digital KWH is also equipped with overcurrent protection using a 5vdc relay that is set to work with a driver in the form of an NPN transistor program on Arduino MEGA 2560. In its appearance this tool can provide information in the form of current, voltage, cosphi and the amount of power used in units of time and has been converted into units of rupiah. This tool can help read electrical instrumentation for homes that are still using analog KWH meters. In the process of measuring this device has an error rate of 0% for current reading, 0.4 for voltage reading, 0.07 for cosphi reading and 4.5% for kWh reading.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21882
Gema Teknologi; Vol 19, No 3 (2017): April 2017 - October 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21957
2020-04-17T20:14:10Z
gema_teknologi:ART
"161031 2016 eng "
2656-582X
0852-0232
dc
PENGENDALIAN KECEPATAN PUTARAN MOTOR DC PADA PENYANGRAI KOPI MENGGUNAKAN PWM BERBASIS ATMEGA 16
Azhar, Ade Siti Sarah
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Ariyanto, Eko
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Ade Siti Sarah Azhar, Eko Ariyanto in this paper explain that Coffee is one of the most popular drinks ever in the history of human civilization. Roasting is one of the most important processes in processing coffee beans that serves to determine the process of forming flavors and aromas in coffee beans. The average roasting process still uses manual methods, so an automatic coffee roaster machine is needed that can support the home roasting process which is equipped with a round control system. It is expected that the roasting process can be carried out quickly. The use of automatic roasting machines aims to save energy and cost and time efficiency. The round control system in this coffee roaster machine uses PWM (Pulse Width Modulation) to regulate speed on a DC motor by regulating the PWM signal which can be done in analog or by using a microcontroller.
By using a motor driver, the motor rotation direction can be controlled. When the DC motor rotates its rotation speed can be detected by an optocoupler which then outputs from the optocoupler will send and process data to the Atmega microcontroller 16. The performance of this control system uses a rotation above 60 Rpm with regulated temperatures above 100 ° C. The performance of this control system gets variations in the results of roasting of coffee beans that are close to the standard of coffee, namely at the rotation of 65 Rpm with a temperature of 130 ° C and the roasting time of 18 minutes with the color of Light Roast coffee beans.
Keywords :Speed Control, PWM, DC Motor, Driver Motor, Optocoupler, Mikrocontroller Atmega 16.
References
• Bahroin, Anaitul dan Agung Prijo Budijono. 2013. Sistem Kontrol Suhu dan Putaran pada Mesin Penyangrai Kopi Semi Otomatis. Surabaya: Jurusan Teknik Mesin, Fakultas Teknik, Universitas Negeri Surabaya.
• Ciptadi, W dan Nasution, M.Z. 1998. Pengolahan Biji Kopi. Fakultas Teknologi Institut Pertanian Bogor.
• Hidayat, Qory. 2012. Pengaturan Kecepatan Motor DC dengan Menggunakan Mikrokontroler Atmega 8535. Balikpapan: Jurusan Teknik Elektronika, Politeknik Negeri Balikpapan.
• Jumadril, dkk. Pengaturan Kecepatan Motor DC menggunakan PWM Berbasis Mikrokontroler Atmega 16. Batam: Teknik Elektro, Fakultas Teknik, Universitas Batam.
• Juni S, Eryc Tri, Ponco Siwindarto, dan Eka Maulana. 2015. Penyangrai Biji Kopi Otomatis Untuk Rumah Tinggal. Malang: Jurusan Teknik elektro Universitas Brawijaya.
• Khamdi, Nur. 2014. Aplikasi Optocoupler dalam Sistem Pengaturan Kecepatan Sepeda Listrik. Riau: Program Studi Mekatronika Jurusan Elektro Politeknik Caltex Riau.
• Surono, dkk. 2008. Bahasa Indonesia Untuk Perguruan Tinggi. Semarang: Fasindo Press.
• Yahyfian. 2009. Kendali Putaran Motor DC Menggunakan PWM. Bandung: Jurusan Teknik Elektro, Politeknik Negri Bandung.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21957
Gema Teknologi; Vol 19, No 1 (2016): April 2016 - October 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/366
2020-04-17T20:07:01Z
gema_teknologi:ART
"101024 2010 eng "
2656-582X
0852-0232
dc
DAMPAK PELAYARAN KAPAL LAUT DI ALUR SUNGAI MUSI
Sugeng, Sunarso
Sunarso Sugeng, in this paper explain that the effect of movement of ship in Musi River cause environmental damage in the form of path exterior erosion / wall step aside river,effect from this material erosion result the happening of accelerateing sedimentation which enough quickly so that degrade energy support sea transport path and for the conservancy of groove this sea transport require dredging fund which do not lessen fastly of this sedimentation one of the way of is to make regulation demarcation speed of sea transport to ship have certain dimension .. To lessen erosion effect movement of other causes and boat, earn is also considered to regarding strong effort of bank groove by protecting it with bagwark, revetment etcetera as according to principle engineer river Key word Sungai musi
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/366
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/25749
2020-11-05T09:35:25Z
gema_teknologi:ART
"191031 2019 eng "
2656-582X
0852-0232
dc
SIMULASI PELIMPAHAN BEBAN SISTEM PMT KOPEL TO KOPEL PADA SAAT PEMELIHARAAN TRAFO BERBASIS ARDUINO MEGA 2560 MENGGUNAKAN VT SCADA 11.2
Samputro, Muhammad Rizki
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=_PO4HH0AAAAJ http://orcid.org/0000-0002-0425-0619
Coupling; Load Transfer; Normalization; Kopel to Kopel; Arduino; VTScada;
Mochammad Rizki Samputro, Arkhan Subari in this paper explains that the need for electricity in everyday life demands PT. PLN to always maintain the distribution of electrical energy to customers. Therefore, it is necessary to use a strategy to prevent blackouts if the transformer is being maintained, that is by maneuvering the load through the network or by using a 20 KV coupling system. The 20 KV Coupling System consists of PMT Kopel Transformer 1 and PMT Kopel Transformer 2 or often called PMT Kopel to Kopel. In this research, a Kopel to Kopel PMT simulation tool is used to transfer transformer loads during maintenance using a LY2N DPDT 12 V relay, ZMCT103C current transformer sensor, voltage sensor, tap changer and use Arduino Mega 2560 as a delivery choice change. After the experiment, the total current size of transformer 1 and transformer 2 exceeds the capacity of transformer which is 4.29 A and the voltage difference is 0.71 V (5.9 %). Therefore it is necessary to adjust the current and voltage regulation so that it becomes 2.82 A and 0.06 V (0.5 %). After that the transfer of load Transformer 2 to Transformer 1 using PMT Kopel to Kopel can be done. The load transfer is done by entering the PMT Kopel 1 and PMT Kopel 2 simultaneously and the Incoming 2 PMT is released. For the normalization, PMT Incoming 2 is entered and PMT Kopel 1 and Kopel 2 are released simultaneously.
Vocational School Diponegoro University
2019-10-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/25749
Gema Teknologi; Vol 20, No 3 (2019): April 2019 - October 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4714
2020-04-17T20:08:47Z
gema_teknologi:ART
2656-582X
0852-0232
dc
EKSPERIMEN PEMBENTUKAN KERAK GIPSUM PADA PIPA BERALIRAN LAMINIR DENGAN PARAMETER LAJU ALIR DAN ADITIF ION CU2+ : KAJIAN KINETIS
Mangestiyono, Wiji
Program Studi Diploma III Teknik Mesin Fakultas Teknik Undip
Bayuseno, A.P.
Teknik Mesin Fakultas Teknik Undip
Muryanto, Stefanus
Fakultas Teknik Untag
Wiji Mangestiyono, , A.P. Bayuseno, Stefanus Muryanto, in this paper explain that the problem of gypsum scaling becomes a trouble for some industry in which use some water for its system. Some disadvanteges come up because of : the time of industrial process will be more longer and production cost increase necesery.To prevent the growth of scale, the experiment must be done. Researcher try to answer this problem so an experimental about kinetic study of gypsum scaling established. Flowrate would be a parameter with assume that it has effect on reaction flow. The result of this experiment are : reaction rate increase when flow rate increase; adition some aditives becomes reaction rate decrease.
Keywords : crystal, flow rate, reactio rate, gipsum
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4714
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/32912
2020-11-12T22:08:21Z
gema_teknologi:ART
"201030 2020 eng "
2656-582X
0852-0232
dc
PROTOTYPE SISTEM PINTAR PENGELOLAAN TAMAN BUNGA BERBASIS TEKNOLOGI INTERNET OF THINGS (STUDI KASUS TAMAN KUPU-KUPU GITA PERSADA)
Nama, Gigih Forda
Teknik Informatika, Universitas Lampung http://gigihfordanama.wordpress.com http://orcid.org/0000-0002-5059-3735
Setia, Harlika Nobra
Teknik Informatika, Universitas Lampung
Komarudin, Muhammad
Teknik Informatika, Universitas Lampung
Muhammad, Meizano Ardhi
Teknik Informatika, Universitas Lampung
Arduino uno; sensor DHT11; sensor HC-SR04
Usually the process of watering and monitoring of plants in the Gita Persada Butterfly Park in Lampung Province is carried out using conventional methods, this condition create many problems. The research aims is to create a prototype of flower garden application based on Internet of Things (IoT) technology. An application that can help relieve watering activities and monitoring with automated system developed by protoyping method, that consist of; communication stage, quick plan and modelling quick design, construction of prototype, and deployment delivery and feedback. This application use microcontroller Arduino Uno as the main controller, temperature sensor, air humidity (DHT11), soil humidity, ultrasonic sensors (HC-SR04) and application on smartphones android for monitoring. Data delivery between arduino devices, smartphones and databases using website service. There is a firebase library on website Service to connect to firebase. Data transmitted by the device arduino through the protocol http with the command get, send, and push, then received by website Service and forward to be saved on firebase. Based on the data obtained at the air temperature and humidity monitoring around the smart garden for 31 days from April 8 to May 8 , the lowest air temperature is 25°C at 08.00 WIB, 26 April and the highest air temperature 30 °C at 12.00 WIB, 19 April. The average air humidity value is at 95%.
Vocational School Diponegoro University
2020-11-11 15:02:23
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/32912
Gema Teknologi; Vol 21, No 1 (2020): April 2020 - October 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8814
2020-04-17T20:10:09Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
PEMBUATAN PROTOTIPE PENGERING BATUBARA UNTUK MENGURANGI MOISTURE CONTENT PADA PLTU
Mangestiono, Wiji
PSD III Teknik Mesin
Wiji Mangestiono, in paper prototype development of coal dryer to reduce moisture content on power plant explain that the percentage of coal use in the power industry in Indonesia has increased during the period of the last ten years. This policy is taken by the government by at least two considerations, namely: the higher world oil prices so that the price of electricity per kwh increase in addition Indonesia itself is the world's largest coal producer with serial number to six so that the transfer of fuel oil to the coal is considered very right. There is a fundamental problem that must be observed that coal mining in Indonesia in general have a low- rank quality with sub - categories butuminus and lignite which has a low calorific value (below 6100 kcal / kg ) and moisture content (moisture content) relatively high (40%). This is exacerbated by the way the coal deposit which is usually placed on the page (coal yard). Low-rank coal with pores relatively greater will more easily absorb water during the rainy season so that the moisture content will be even greater. The use of coal in Rembang reached 1.3 million tons / year. Heat loss due to the use of coal with a high moisture content reaches 300 billion kcal per year or equivalent to coal with a calorific value of 50 thousand tons or the equivalent of cash also 30 billion rupiah. After observing the phenomenon in Rembang the researchers plan to create a prototype coal heaters with a capacity of 100 kg / hour in the hope of getting a concept to eliminate or minimize heat loss as described. Heating devices planned screw -shaped drum with a player in it which serves stirring granulated coal. The hot air is taken from the flue gas is sprayed into the drum. The independent variable of this study is the screw rotational speed and the speed and temperature of the hot air flow. Coal is expected after discharge from the dryer may have a water content below 10 % as high quality coal (anthrasit).
Keyword : coal, moisture content, dryers
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8814
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8924
2020-04-17T20:11:24Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PEMANFAATAN MOTOR SERVO SEBAGAI PENGGERAK CCTV UNTUK MELIHAT ALAT-ALAT MONITOR DAN KONDISI PASIEN DI RUANG ICU
Hilal, Ahmad
PSD III Teknik Elektro
Manan, Saiful
PSD III Teknik Elektro
Ahmad Hilal, Saiful Manan, in paper use servo motor as a CCTV driver to see monitoring equipment and conditions of patients in the icu room explain thatservo motor is a motor with a closed feedback system in which the position of the motor will be communicated back to the control circuit in the servo motor, servo motor is able to work both directions (clockwise and belawanan clockwise) in which the direction and angle of the rotor movement can controlled only by providing PWM signal duty cycle settings on the control pin. In the servo motor function of this type is only capable of moving in either direction (CW and CCW) with respective deflection angle reaches 90 ° so that the total deflection angle of the center - right -kiri adalah180 °. Part of the servo motors consist of a potentiometer which functions as a regulator of the servo movement of a large pulse is given, the internal gear serves as a torque amplifier dc servo motors, dc motors as the driving part that converts electrical energy into motion, as well as a control circuit servo motor driver function to process the data input pulses into motion. Servo motors used to drive the CCTV, in order to see the health of the patient monitoring devices as instructed. The servo motor voltage of 5 volts dc power supply from PC. Servo motor movements influenced the input pulse, to round to the right then it takes the pulse of more than 1,5ms, for the leftist movement takes the pulse of less than 1,5ms and at the center position or silence takes input pulse of 1.5 ms with a delay of 20 ms. Servo motors work processes in order to move that the serial data input from the PC, the serial data into the ATMEGA 8 for processing, so that the serial data is converted into binary data through IC74595 as servo motor driver, to output one of IC74595, the servo motor can move, because inflows along with pulses to the servo motor control circuit.
Keywords: DC servo motors, Power Supply, IC74595, ATMEGA 8
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8924
Gema Teknologi; Vol 17, No 2 (2013): October 2012 - April 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8935
2020-04-17T20:12:10Z
gema_teknologi:ART
2656-582X
0852-0232
dc
YODISASI GARAM RAKYAT DENGAN SISTEM SCREW INJECTION
Hartati, Retno
Program Studi Ilmu Kelautan
Supriyo, Edy
PSD III Teknik Kimia
Zainuri, Muhammad
Program Studi Ilmu Kelautan
Retno Hartati, Edy Supriyo, Muhammad Zainuri, in this paper explain that many salt industry is currently undergoing a inefficiencies process in the production system. Declining quality of salt from the salt ponds and lack of homogeneity in the iodine content of salt briquettes and much KIO3 wasted. So it is necessary to increase the iodine levels in salt. This activity aims to design, create and test a iodized salt machine with a capacity of 1-2 tons per hour and perform quality control on products. Community service activities have been successfully implemented by creating iodized salt machine. The process is done by means of iodized salt machine in the salt product becomes higher and meet ISO standards, in which prior to iodized salt machine the content of KIO3 is 0 ppm and become 50 ppm after using KIO3.
Keywords : yodization, salt,screw, injection
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8935
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/19152
2020-04-17T20:15:40Z
gema_teknologi:ART
"180430 2018 eng "
2656-582X
0852-0232
dc
ANALISA PERHITUNGAN BALLAST PADA PELUNCURAN MENYAMPING (SIDE LAUNCHING) KAPAL SUNGAI 200GT DI PT. DKB (PERSERO) CABANG SEMARANG
Ariany, Zulfaidah
Teknik Perkapalan, Sekolah Vokasi, Universitas Diponegoro
Launching; Side Launching; Ballast;
Considering the risk faced in the side launching, limited land from the shipyard so that required calculation and analysis in the implementation of the launching. The purpose of this research is analyzes and counting ballast (a counterweight ) used in a river boat lct 200 GT on the launching of sideways ( side launching ) so that safe and floats can be perfect in water, as nown that the launching of is one of the stages important in the development process the new vessel which have prepared to be operated, formerly preceded by stage first cutting plate ( cutting first steel plate ) and the keel laying ( laying ) keel of a ship. Before the handover of a vessel is carried, a ship will had some sea trial. The results of this research is scientific publication in national journal , as a input for the shipyard to implement the launch sideways safe as well as the basis for students and teachers included in matter basic lecture subjects of case in point in lecture the theory ship building.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/19152
Gema Teknologi; Vol 19, No 4 (2018): October 2017 - April 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21867
2020-04-17T20:14:57Z
gema_teknologi:ART
"170430 2017 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN DAN MONITORING PENYEARAH DAN ATS (AUTO TRANSFER SWITCH) PADA SISTEM MONITORING SUMBER DC GARDU INDUK BERBASIS ARDUINO MEGA 2560
Wirawan, Herdoyo
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
automatic transfer switch; rectifier; DC source; voltage sensor;
Herdoyo Wirawan, Arkhan Subari, in this paper explain that the DC source at a PLN substation has a very important role in the smooth operation of the substation itself in a protection and serving the electricity needs of customers. This DC source serves to drive protective equipment, emergency lighting, and others.
When the DC source on the receptor is interrupted, the dc source used is a DC source that comes from the battery. When certain conditions cannot guarantee whether the battery capacity is capable of supporting the load borne by the battery, it must always be monitored with a voltage sensor. In order for the protective equipment to continue to work, when the rectifier from the PLN power supply is cut off, a voltage source from 12VDC batteries is used. Switching the voltage source between the rectifier and the battery is done automatically by using the ATS (Automatic Transfer Switch) circuit. When the DC source from the PLN electricity supply will return it will be detected by an optocoupler sensor which later ATS will automatically switch the voltage source again.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21867
Gema Teknologi; Vol 19, No 2 (2017): October 2016 - April 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21933
2020-04-17T20:13:16Z
gema_teknologi:ART
"151031 2015 eng "
2656-582X
0852-0232
dc
SISTEM DESELERASI KECEPATAN OTOMATIS PADA MOBIL BERDASARKAN JARAK MENGGUNAKAN SENSOR ULTRASONIK HC-SR04 BERBASIS ARDUINO MEGA 2560
Musthofa, Fikri
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Winarno, Heru
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Fikri Musthofa, Heru Winarno, in this paper explain that along with the high number of accidents on the highway at this time of course must be a special concern for motorists. There are many factors that underlie the occurrence of an accident in driving, the most important of which is the factor of driver error in driving, such as drowsiness or lack of rest, lack of concentration, and much more. Besides the security system in vehicles is also very influential in reducing the number of accidents in driving. With the development of today's technology, it is necessary to create a speed deceleration system on the motor based on the distance to the barrier objects in front of the vehicle using ultrasonic sensors. Ultrasonic sensor which is a type of proximity sensor is a sensor that can detect distances so that it can be used as a sensor in this system. This system can reduce motor speed automatically when the sensor detects a barrier object in front with a distance of less than 300 cm. This system will be active when the ultrasonic sensor detects a distance of less than 300 cm. At that distance the Arduino Mega 2560 will adjust the PWM value of the motor, the motor PWM value will decrease 12% every second so that within a period of 8 seconds the motor will have a speed of 0 rpm which means the motor will stop. This system is expected to reduce the number of road accidents due to motorists' faults.
Keywords: Speed Deceleration, PWM Method, Ultrasonic Sensor, Arduino Mega 2650.
References
• Agus Setya Abadi, Delta. 2008. Sensor Ultrasonic Sebagai Alat Navigasi Robot Pemadam Api.. Tugas Akhir PSD III Teknik Elektro (Tidak diterbitkan) Semarang : Universitas Diponegoro.
• Anonimus. 2012. Sensor Ultrasonic HC-SR04. Diunduh dari http://arduino- learning.com/code/hc-sr04-ultrasonic-sensor-example.php diakses pada 1 Juni 2015 pukul 14.30 WIB.
• Anonimus. 2013. Rangkaian Skematik Driver Motor L298N. Diunduh dari http://www.yujum.com/rangkaian-dan-skematik-driver-motor-l298n/ diakses pada 17 Juni 2015 pukul 19.45.
• Anonimus. 2014. Accumulator atau Aki dan jenisnya. Diunduh dari http://www.sandielektronik.com/2014/03/accumulator-atau-aki.html diakses pada 30 Mei 2015 pukul 16.15 WIB.
• Prayogo, Rudito. 2012. Pengaturan PWM dengan PLC. Tugas Mata Kuliah Teknik Otomasi (Tidak diterbitkan). Malang: Universitas Brawijaya.
• Riny Sulistyowati. 2012. Perancangan Prototype System Kontrol Dan Monitoring Pembatas Daya Listrik Berbasis Mikrokontroler. Surabaya : Institut Adhi Tama Surabaya.
• Surono. 1988. Tata Tulis Karya Ilmiah Bahasa Indonesia. Semarang : Fakultas Sastra Universitas Diponegoro.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21933
Gema Teknologi; Vol 18, No 3 (2015): April 2015 - October 2015
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/327
2020-04-17T20:06:39Z
gema_teknologi:ART
"101023 2010 eng "
2656-582X
0852-0232
dc
PENINGKATAN MUTU GULA TUMBU MELALUI METODE SULFITASI DALAM LABORATORIUM
A Sutowo, Latief
Rizal, Syarief
Muhadiono, Muhadiono
A. Sutowo Latief, Rizal Syarief, Bambang Pramudya, Muhadiono, in this paper explain that the reseach was aimed to increase of brown sugarcane (gula tumbu) quality by sulphitation method in laboratory eksperimetal, supposed the result fulfils the first quality according to SNI 1-6237-2000 that is a minimal condition of safety food. The method based on factorial complete random plan thrice reduplications. Initially nira that filtered given lime tohor and heated 50-60oC up to achieve ph 9. The treatment: (1) make nira ph 7 and ph 8 with add sulphite acid, and (2) ripening temperature, that is 70,80,90, and 100oC. Nira that heated up to coagulate and it was poured into moulding and solidification to be brown sugarcane. The testing is done towards sugar quality, it was result with parameter: (1) water contain, (2) sucrose contain, (3) glucose contain, (4) rendemen, (5) colour, (6) taste, (6) smell, and (8) hardness of brown sugarcane that produced fulfil the first quality of SNI 1-6237-2000. The best treatment process heats nira in 100°C, either nira ph 7 and nira ph 8. Keywords: brown sugarcane, quality, sulfitation method.
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/327
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/22418
2020-04-17T20:16:31Z
gema_teknologi:ART
"190430 2019 eng "
2656-582X
0852-0232
dc
PELATIHAN PEMBUATAN TAMAN DAN SERBUK TANAMAN OBAT DI TEMBALANG SEMARANG
Kusumayanti, Heny
Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.co.id/citations?user=pfqQIVwAAAAJ&hl=en&oi=ao
Paramita, Vita
Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro
Wahyuningsih, Wahyuningsih
Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro
Amalia, Rizka
Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro
Siregar, Vynda Dindasari
Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro
Simalango, Basa Ulina br
Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro
Siswati, Elin
Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro
Tanaman obat; serbuk tanaman obat; pondok pesantren; Medicinal plants; medicinal plant powder; Islamic boarding school;
Indonesia merupakan negeri yang subur, banyak tanaman yang dapat tumbuh, antara lain tanaman obat, tetapi sampai saat ini belum dimanfaatkan secara maksimal, sehingga perlu adanya sosialisasi dan pelatihan kepada masyarakat. Adanya Pelatihan Pembuatan Taman Dan Serbuk Tanaman Obat Di Pondok Pesantren Mahasiswa Nurul Hikmah Di Kecamatan Tembalang, Kotamadya Semarang, merupakan transfer ilmu dan penerapan teknologi tepat guna kepada masyarakat khususnya di Pondok Pesantren Mahasiswa Nurul Hikmah. Pemanfaatan tanaman obat selain untuk dikonsumsi juga untuk penghijauan atau penghias halaman rumah. Pelatihan ini mampu memberikan edukasi kepada mahasiswa di Pondok Pesantren Mahasiswa Nurul Hikmah cara menanam, merawat tanaman obat yang baik dan benar.
Indonesia is a fertile country, many plants can grow, including medicinal plants, but until now it has not been utilized optimally, so there needs to be socialization and training for the community. Training on the Making of Parks and Medicinal Powder at the Islamic Boarding School of Nurul Hikmah In Tembalang Subdistrict, Semarang Municipality, is a transfer of knowledge and the application of appropriate technology to the community, especially in the Islamic Boarding School of Nurul Hikmah. Use of medicinal plants in addition to being consumed also for reforestation or decorating the home page. This training is able to provide education to students at the Islamic Boarding School Student Nurul Hikmah. The wisdom of how to plant, treat medicinal plants that are good and right.
Vocational School Diponegoro University
2019-05-13 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/22418
Gema Teknologi; Vol 20, No 2 (2019): October 2018 - April 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4709
2020-04-17T20:08:10Z
gema_teknologi:ART
2656-582X
0852-0232
dc
STUDI EKONOMI RENOVASI PROPULSI KAPAL PATROLI “PARIKESIT”
Ridwan, Mohd
Program Studi Diploma III Teknik Perkapalan
Fakultas Teknik Universitas Diponegoro
Mohd Ridwan, in this paper explain that new replacement main engine and propeller ship needs to be done with technical economic considerations. Main engine maintenance costs that have entered the age of 15 years improved each annualy, and fuel consumption increases. So that needs to be done renovations main engine by selecting the main engine in accordance with the propeller or propeller can also perform renovations. For this purpose needs the engineering and economic studies to decrease over 10% of the ship operational costs.
Keywords : Main engine, Propeller, Operational costs
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4709
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/28516
2020-06-05T08:41:43Z
gema_teknologi:ART
"200430 2020 eng "
2656-582X
0852-0232
dc
ANALISIS UJI TIDAK MERUSAK PADA SAMBUNGAN LAS LAMBUNG FRAME 103 BAGIAN KAMAR MESIN KAPAL PATROLI 73 DENGAN METODE RADIOGRAPHY TEST
Sulaiman, Sulaiman
Program Studi Diploma III Teknologi Perancangan dan Konstuksi Kapal, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro
Utomo, Budi
Program Studi Diploma III Teknologi Perancangan dan Konstuksi Kapal, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro
Ardi Wijana, I Putu Agung
Program Studi Diploma III Teknologi Perancangan dan Konstuksi Kapal, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro
NDT; radiography test; welding; patrol boat
Non-Destructive Test is a supporting tool that is highly relied upon by the activities of controlling and ensuring the quality of a welding. Radiography test is one of the non-destructive tests that uses gamma rays that can penetrate almost all metals so that it can be used to reveal defects or discrepancies behind metal walls or within the material itself. The purpose of this paper is to know, plan a non-destructive testing activity with radiography test which includes the understanding along with the equipment needed during the testing process, what devices contribute to the testing process, as well as knowing the advantages and disadvantages of the test radiography. The method used in This writing is by experiment with welding connection frame 103 Patrol Ship 73 engine rooms. Radiography Test results found no welding defects on the inside of the welding as deep as a plate thickness, so that otherwise passed the checking received by BKI. Good preparation and consideration are needed before conducting this test.
Vocational School Diponegoro University
2020-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/28516
Gema Teknologi; Vol 20, No 4 (2020): October 2019 - April 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8809
2020-04-17T20:09:49Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
PEMANFAATAN PMT KOPEL SEBAGAI SARANA PENGALIHAN BEBAN DI GARDU INDUK SAYUNG KABUPATEN DEMAK
Wibowo, Binka Aji
PSD III Teknik Elektro Undip
Manan, Saiful
PSD III Teknik Elektro Undip
Binka Aji Wibowo, Saiful Manan, in paper use PMT coupling as load transfer in Sayung District Substation, Demak explain that to meet the reliability of the distribution system , it is necessary to do a continuity in the distribution of electrical energy. There are various causes of outages ranging from maintenance to interference. To resolved these problems, there are several solutions that can be done, such as transfer transformer load through PMT coupling. This can be done by connecting the two busbars by using a PMT. In operation the PMT coupling need to do prior preparation, among others, the daily load calculations. It is intended to carry transformer load does not exceed setting value.
Keywords : PMT coupling, Busbar, Transformer.
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8809
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/46828
2022-06-21T07:48:00Z
gema_teknologi:ART
"220430 2022 eng "
2656-582X
0852-0232
dc
PEMANFAATAN METODE WAVS (WEB APPLICATION SECURITY SCANNERS) MENGGUNAKAN BURP SUITE TOOLS DALAM AUDIT TEKNIS KEAMANAN SISTEM INFORMASI SURAT TUGAS SEKOLAH VOKASI UNDIP
Subari, Arkhan
STr. Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=_PO4HH0AAAAJ http://orcid.org/0000-0002-0425-0619
Manan, Saiful
STr. Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro
Ariyanto, Eko
STr. Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro
Fauzi, Adnan
Teknik Komputer, Fakultas Teknik, Universitas Diponegoro
technical audit; information security; WAVs (Web Application Security Scanners); bruteforce; Burpsuite;
An official travel assignment letter is a type of assignment letter needed by an employee in carrying out work assignments. In many ways, the assignment letter information system is built based on web-programming. In web-programming there are two methods to send data from client to server. The two methods are the POST method and the GET method. Information security is an important aspect that needs to be considered in design a information system. There are many attacker spying data on information system daily. Usually the attacker uses the loopholes in the data transmission method to attack the system. There are many techniques used to attack information systems likes WAVs (Web Application Security Scanners). WAVs is a program that is used to find security holes in web-based information systems using several methods, such as XSS, SQL Injection, Intercept and Bruteforce. One program that can be used is Burp Suite. Burp Suite is often used by security auditors, researchers, and testers for analysis of different systems. Burp's core functionality is to intercept and display HTTP requests in a structured manner. The Vocational School of Diponegoro University has developed an information system that is used to manage this assignment letter. The information system is design using a web-based application. However, the system has never been technically audited on its security level. Therefore, it is necessary to audit the information system security techniques so that the level of information system security can be ascertained and corrective steps can be taken if there are security holes found. This study is intended to conduct a technical audit of the security of the UNDIP Vocational School assignment letter information system. The audit was conducted using the WAVs (Web Application Security Scanners) method with the Burp Suite application. The results of the brutefoce test using Burpsuite showed that there was no suitable password. However, the fact that an attacker can attack 30,0006 times is a weakness that needs to be fixed.
Vocational School Diponegoro University
2022-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/46828
Gema Teknologi; Vol 21, No 4 (2022): October 2021 - April 2022
eng
Copyright (c) 2022 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8919
2020-04-17T20:11:00Z
gema_teknologi:ART
2656-582X
0852-0232
dc
ALAT PENGUKUR DETAK JANTUNG MENGGUNAKAN PULSESENSOR BERBASIS ARDUINO UNO R3 YANG DIINTEGRASIKAN DENGAN BLUETOOTH
Wohingati, Galuh Wahyu
PSD III Teknik Elektro
Subari, Arkhan
PSD III Teknik Elektro
Galuh Wahyu Wohingati, Arkhan Subari, in paper pulse measuring tool using pulsesensor based on Arduino Uno R3 integrated with Bluetooth explain that emerging disease and claimed the lives of many people is often due to late treatment , when it should be in the modern era has many tools made to overcome this problem , medical devices can only be used by medical experts , and of course takes time and no small cost . as well as heart disease which sometimes can only be detected when it is advanced because of the lack of monitoring , both from people who are sick or from a doctor . Other factors that cause costs adalahkesibukan and not everyone can do medical check- ups regularly . Whereas By knowing the health condition of a person's heart rate will then be awake , do not need expensive care from a doctor , but could by changing lifestyle . Therefore it needs to be made a tool that can measure heart rate , showing whether or not the condition of the heart and of course, this tool can be used by everyone without kecuali.Dengan development of technology and the number of components on the market which can be accessed , Arduino Uno facilities in R3 can be used . Arduino is a physical computing platform that is open source means , Arduino can be developed by many people , not just programmers .But not just a development tool , Arduino is a combination of hardware , programming language and integrated development environment ( IDE ) that is advanced . Paired with a pulse sensor , a media reader analog heart rate is then converted into digital data that is in the readings , then integrated using serial bluetoothsecara so it can be displayed on your android smartphone and used repeatedly as needed measurements ..
Keywords : Arduino Uno R3 , pulse sensor , Bluetooth
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8919
Gema Teknologi; Vol 17, No 2 (2013): October 2012 - April 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8930
2020-04-17T20:11:48Z
gema_teknologi:ART
2656-582X
0852-0232
dc
APLIKASI PLC SEBAGAI PENGATUR ARAH PUTARAN MOTOR DC UNTUK MENGGERAKAN PMS PADA MINIATUR GARDU INDUK
Aripin, Syarif
PSD III Teknik Elektro
Moediyono, Moediyono
PSD III Teknik Elektro
Syarif Aripin, Moediyono, in this paper explain that experiment PLC module is a module that consists of modules and visual experiments. This experimental module consists of PLC (Programmeble Logic Controller) which contained PLC in Central Processor Unit (CPU), memory such as RAM (Radom Access Memory), EPROM (Erasable Programmable Only Memory), EEPROM (Electrical Erasable Programmeble Read Only Memory), input-output module and power supply units (Power supply). PLC is used as props in a series of applications to set the dc motor speed desired by mengguanakan input of the switch. OMRON PLC used is CP1EE with 40 I / O, ie 24 inputs and 16 outputs, PLC is used here as a regulator to enable drivers dc motor is used as a regulator dc motor rotation direction to move pms. In the later rounds measured measurement value is varied. The results of these measurements can be read on the voltmeter and ammeter.
Keywords: Driver Motor, DC Motor, Omron PLC CP1E, PMS.
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8930
Gema Teknologi; Vol 17, No 3 (2013): April 2013 -October 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8980
2020-04-17T20:13:00Z
gema_teknologi:ART
"150401 2015 eng "
2656-582X
0852-0232
dc
PERANCANGAN SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA) MENGGUNAKAN SOFTWARE CX-SUPERVISOR 3.1 PADA SIMULASI SISTEM LISTRIK REDUNDANT BERBASIS PROGRAMMABLE LOGIC CONTROLLER (PLC) OMRON CP1E NA-20-DRA
Almuhtarom, Almuhtarom
PSD III Teknik Elektro
Sasmoko, Priyo
PSD III Teknik Elektro
Almuhtarom, Priyo Sasmoko, in this paper explain that the existence of electrical energy for human needs can not be separated, the electrical energy used by all humans on this planet of small-scale (household) to large-scale industry. Demand the amount of electrical energy and the quality of the electricity transmission system has increased over time. Disruptions in electricity transmission system could be fatal for the electrical components or the operating loss in an industry. SCADA is proposed to accommodate this problem. SCADA is able to monitor and control the disturbances in electrical systems redundant. The purpose of this final project is to simulate a SCADA system to eliminate redundant electric power transmission network failures such as open-circuit, short circuit, and overload that can be controlled directly from the plant or via an interface on the computer. Ladder diagram programming languages used to design the PLC system. Hardware and software to support this thesis, such as plant redundant electrical systems, Omron PLC CP1E NA-20-DRA, Laptop, CX One 9.3 software for programming the PLC and the CX Supervisor 3.1 for building HMI. The test results indicate that the current sensor can be used to detect if an interruption occurs in the form of overload and short circuit simulate disturbances. Plant redundant electrical system can be monitored and controlled through input-output of the plant, computer interface, and the World Wide Web. There is a relay on a plant that can connect to the electricity grid cut power lines when an interruption occurs. If an interruption occurs in the form of an open circuit, short circuit or overload, alarm and disturbance indicators will be active.
Keywords: SCADA, PLC, open circuit, short circuit, overload
Vocational School Diponegoro University
2015-08-21 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8980
Gema Teknologi; Vol 18, No 2 (2015): October 2014 - April 2015
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21862
2020-04-17T20:14:25Z
gema_teknologi:ART
"170430 2017 eng "
2656-582X
0852-0232
dc
PEMINDAHAN TAPING FASA UNTUK PENYEIMBANGAN BEBAN PADA JARINGAN 3 FASA DENGAN MENDETEKSI ARUS NETRAL BERBASIS ARDUINO MEGA 2560
Wicaksana, Pandu
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Manan, Saiful
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Unbalanced Load; Neutral Flow; SCADA; load balancing;
Pandu Wicaksana, Saiful Manan, in this paper explain that the load balance on the 3 phase 4 wire distribution system is very important. Continuous load imbalances can cause a decrease in the reliability of the electric power system and the quality of electrical energy. One consequence of an unbalanced load is the presence of a current flowing in a neutral introduction. The purpose of this study is to find out and analyze the current in a neutral conductor when the load conditions are unbalanced and when balanced. Load balancing is done by manual-remote, which means that the transfer of taping at a load is done by pressing the button that has been integrated with the HMI display. This software is also responsible for displaying current output from the sensor. That way, it can be seen that the current value of the neutral conductor before and after load balancing is done. That the current value of the neutral conductor will be smaller when the load is balanced compared to when the load between phases is not balanced.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21862
Gema Teknologi; Vol 19, No 2 (2017): October 2016 - April 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21912
2020-04-17T20:13:49Z
gema_teknologi:ART
"160430 2016 eng "
2656-582X
0852-0232
dc
SISTEM KONTROL SUHU AIR MENGGUNAKAN PENGENDALI PID. DAN VOLUME AIR PADA TANGKI PEMANAS AIR BERBASIS ARDUINO UNO
Megido, Adiel
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Ariyanto, Eko
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Adiel Megido, Eko Ariyanto in this paper explain that the temperature control system on water heaters that use electric heaters, generally uses ON-OFF voltage control. Apart from this system being less efficient in using electricity, the limited range of voltage settings provided also lacks the output accuracy value required by the control system. So that for some applications it can cause a response to the temperature control system that oscillates. Another alternative in controlling the heating voltage is by using the PID control method (Proportional - Integral - Derifative), this method provides a wider range of voltage settings, so that it can provide the output accuracy value needed by the control system, thus making it possible to obtain system responses finer (minimum oscillation amplitude). In addition to problems with the temperature control system, the water volume control system in the water heater tank generally still uses probes that are installed at certain levels. The limitations in reading each change in height / volume of water causes the system output to be less linear (discrete). To produce linear readings and outputs in each change in water volume, a voltage divider can be used. In this final project design will use an electric water heater tank as a medium to determine the ability of the PID controller to control water temperature according to the set-point and control the height / volume of water in the tank using a voltage divider.
Keywords : PID (Proporsional – Integral – Derifatif), Berosilasi, Set-point
References
• Malvino, Albert Paul. 1981. Prinsip-prinsip Elektronik edisi kedua. Jakarta: Erlangga.
• Gunterus, Frans. 1994. Falsafah Dasar : Sistem Pengendalian Proses.Jakarta:Elex Media Komputindo
• Efendy, Marwan.n.d. Bab 1 Sistem Pengendalian. Surakarta: Universitas Muhamadiyah Surakarta
• Bolton, W. 2009. Sistem Instrumentasi dan Sistem Kontrol. Jakarta:Erlangga
• Ogata, Katsuhiko. 1996. Teknik Kontrol Automatik Jilid 1-2, Diterjemahkan oleh Ir. Edi Laksono. Jakarta : Erlangga.s
• Petruzella, Frank D. 1996. Elektronika Industri. Yogyakarta: Andi Yogyakarta.
• Rashid, H Muhammad. 1999. Elektronika Daya Jilid 1. Jakarta: Prehalindo.
• Michael Tooley, BA. 2003. Rangkaian Elektronik Prinsip dan Aplikasi Edisi kedua. Jakarta : Erlangga.
• Bishop, Owen. 2004. Dasar-Dasar Elektronika. Jakarta : Erlangga.
• Majid, Saifulloh Agung. 2009. Pengontrolan Temperatur Menggunakan Metode Kontrol PID Berbasis Mikrokontroler AT90S8515. Semarang: Jurusan Teknik Elektro Fakultas Teknik Universitas Diponegoro.
• Surono, dkk. 2009. Bahasa Indonesia Untuk Perguruan Tinggi. Semarang: Farindo Press.
• Laksono, Suryo Krido, Sumardi, dan Aris Triwiyatno. 2010. Pengaturan Sudut Fasa Berbasis Logika Fuzzy Untuk Sistem Pengaturan Temperatur. Semarang: Jurusan Teknik Elektro Fakultas Teknik Universitas Diponegoro.
• Firsyari, Akhmad Salmi, Purwanto, M Aziz Muslim. 2013. Sistem Pengendalian Suhu Pada Proses Distilasi Vakum Bioetanol Dengan Menggunakan Arduino. Semarang: Jurusan Teknik Elektro Fakultas Teknik Universitas Diponegoro.
• Azaria Mutia Suriatmadja. 2013. Modul Kontrol Temperatur Air Berbasis PID Menggunakan Matlab Simulink. Semarang: PSD III Teknik Elektronika Jurusan Teknik Elektro Politeknik Negeri Semarang
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21912
Gema Teknologi; Vol 18, No 4 (2016): October 2015 - April 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/22135
2020-04-17T20:07:47Z
gema_teknologi:ART
"110430 2011 eng "
2656-582X
0852-0232
dc
ANALISIS EFISIENSI PEMAKAINAN BAHAN BAKAR MESIN INDUK KAPAL PURSE SEINER DI PELABUHAN PENDARATAN NUSANTARA PEKALONGAN
Sa’id, Solichin Djazuli
Program Studi Diploma III Teknik Perkapalan
Fakultas Teknik Universitas Diponegoro
Solichin Djazuli Sa’id, in this paper explain that fuel consumption for each vessel were variations depending on the size of ships, ships with a larger size will require more fuel for each mile distance the ship with a GT 101 for a distance of 1 mile with a speed of 6 knots require diesel fuel (dieselfue oil ) 6.24 liter, GT 1991: 6.06 liter, GT 80: 5.69 liter, GT 71: 5.13 liter, GT 61;4.74 liter and most economical is the GT 45 is only 3.30 liters per milnya
The lowest operating costs of fishing vessels is to measure 45GT, 101GT highest. Operational Cost (OC) is the most economical ship with size 45 GT (Modern I).Operational costs are dominating the supply of fuel (diesel) 44%.
Profit rate (profit rate) obtained by vessels of 45 GT (Modern I) has a rate of returnabove 15%, the highest in comparison with vessels of above.
Keywords: Fuel consumption, operating costs
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/22135
Gema Teknologi; Vol 16, No 2 (2011): October 2010 - April 2011
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/3149
2020-04-17T20:07:31Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PEMBERDAYAAN INDUSTRI KECIL KERIPIK PISANG DALAM UPAYA MENUJU INDUSTRI MANDIRI
Pudjihastuti, Isti
Program Studi Diploma III Teknik Kimia FT
Supriyo, Edy
Program Studi Diploma III Teknik Kimia FT
Hartati, Retno
FPIK Universitas Diponegoro
IstiPudjihastuti, Edy Supriyo, Retno Hartati, in this paper explain that the development of micro industries, in banana chip micro industry to the member of group which is culinary enterprise Pemalang speciallized is give suitable solution to consument for giving natural culinary with high nutrition value independently and cheap.
The development of micro industries is circular activity that consist of briefing about the use of gelatse system in banana chip production by naturally and independently, the suitable tachnique of banana chip production, production of furnace completely by steack as pilot plan, assitancy when the producer makes snack in gelatse system. Moreover, the taste of snack more delicious, the market bigger.
Key words: micro industries banana chip
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/3149
Gema Teknologi; Vol 16, No 2 (2011): October 2010 - April 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/28226
2020-05-29T15:02:39Z
gema_teknologi:ART
"200430 2020 eng "
2656-582X
0852-0232
dc
DESAIN EKSPERIMENTAL FAKTORIAL UNTUK PENENTUAN FAKTOR PALING BERPENGARUH PADA PROSES PULPING ORGANOSOLV BERBAHAN BAKU LIMBAH DAUN NANAS
Rayhan, Glenn Mochamad
Program Studi D-III Teknologi Kimia, Sekolah Vokasi, Universitas Diponegoro
Fachrina, Salsabila
Program Studi D-III Teknologi Kimia, Sekolah Vokasi, Universitas Diponegoro
Amalia, Rizka
Program Studi Sarjana Terapan Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro http://orcid.org/0000-0002-6578-9757
paper; pulping; organosolv; pineapple; experiment design
Paper production has been identified with industries that destroy forests (deforestation). Utilizing alternative wood substitute raw materials, such as pineapple leaves can be one solution to the problem. Pineapple plants can produce more than 70 leaves with cellulose content in the leaves which reaches 69.5-71.5%, so it has the potential to be used as raw material for paper. The organosolv process was chosen as a pulp manufacturing process because it produces high purity in the byproducts (lignin and hemicellulose), high pulp yield, easy recovery of black liquor and no sulfur element, making it safer for the environment. This study aims to determine the most influential factors in the organosolv pulping process with a factorial experimental design method 23. Variables used include solvent types (ethanol and acetic acid), pulp cooking time (60 minutes and 110 minutes) and types of leaf dryness (wet leaves) and dried leaves). From the results of the analysis, the most influential factor in the organosolv pulping process is the type of solvent (ethanol). Optimal operating conditions were obtained for solvent ethanol, cooking time of 60 minutes with wet leaves, where cellulose content was 96.31% and lignin content decreased by 17.80% in dry pulp.
Vocational School Diponegoro University
2020-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/28226
Gema Teknologi; Vol 20, No 4 (2020): October 2019 - April 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4787
2020-04-17T20:09:25Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PENGARUH TEMPERATUR TERHADAP PEMBENTUKAN KERAK GIPSUM DALAM PIPA
Sutrisno, Sutrisno
Program Diploma Teknik Mesin Fakultas Teknik Universitas Diponegoro
S. Muryanto, S. Muryanto
Jurusan Teknik Kimia Fakultas Teknik UNTAG Semarang
Bayuseno, AP
Jurusan Teknik Mesin Fakultas Teknik Universitas Diponegoro
Sutrisno, S. Muryanto, AP Bayuseno, in this paper explain that gypsum crust (CaSO4.2H2O) that occurs in the pipe very detrimental to the industry because it resulted in narrowing of the cross-section, reinforcing walls, inhibit heat transfer and slow processing time. Therefore, gypsum crust should be prevented or inhibited growth. Gypsum crust growth is affected by the concentration, temperature and flow rate as well as impurities. This study aimed to determine the effect of temperature on the formation of gypsum crust. Gypsum scaling experiments carried out by reacting a NaSO4 with CaCl2 in a test tool that has been designed. The experiments were performed at a temperature of 27oC-50oC with Ca2 + concentration of 3500 ppm, flow rate 30 ml / min and stainless steel test pipes. Results from this study showed a rise in temperature by lowering the induction time and increase mass scale and make a longer crystal sizes. Test results morphology, composition and purity of the results of the experiment showed that the crust was beanr gypsum.
Keywords : gypsum, scale, temperature
Vocational School Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4787
Gema Teknologi; Vol 16, No 4 (2012): October 2011 - April 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/36170
2022-06-21T07:53:00Z
gema_teknologi:ART
"210430 2021 eng "
2656-582X
0852-0232
dc
SURVEI METODE PENGUKURAN APLIKASI CHATBOT BERBASIS MEDIA SOSIAL
Sekarwati, Ratna Ayu
Program Magister Ilmu Komputer, Universitas Budi Luhur
Sururi, Ahmad
Program Magister Ilmu Komputer, Universitas Budi Luhur
Rakhmat, Rakhmat
Program Magister Ilmu Komputer, Universitas Budi Luhur
Arifin, Miftahul
Program Magister Ilmu Komputer, Universitas Budi Luhur
Wibowo, Arief
Program Magister Ilmu Komputer, Universitas Budi Luhur
chatbot; social media; testing; method; paper review
The design of Chatbot aims to facilitate social activities in all areas to be considered. Chatbot is one type of machine that can communicate with humans using natural language. Communication happening via chat is a written conversation. Chatbot is a form of application implementation from Natural Language Processing (NLP) that belongs to one branch of artificial intelligence or Artificial Intelligent (AI). Social Media now provides a service that allows developers to process and integrate chatbot applications. This paper aims to review the papers that build chatbot applications in various social media using various testing methods. The contribution of this paper is to determine which method is able to measure the level of chatbot accuracy well. This review paper will choose the equation of the most widely used test methods and social media from various papers so that further research is expected to implement the right testing methods and use better social media in terms of user experience, features, and services. The review paper shows that the Black-box and System Usability Scale testing methods are most used in the review paper. This testing method is a type of method that performs testing of the flow and how the chatbot works to achieve functional validation throughly.
Vocational School Diponegoro University
2021-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/36170
Gema Teknologi; Vol 21, No 2 (2021): October 2020 - April 2021
eng
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/download/36170/108474
Copyright (c) 2021 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8914
2020-04-17T20:10:34Z
gema_teknologi:ART
"121001 2012 eng "
2656-582X
0852-0232
dc
ALAT PENGGERUS OBAT OTOMATIS BERBASIS MIKROKONTROLER AVR ATMEGA 16 DISERTAI TAMPILAN LCD
Noviana, Eva
PSD III Teknik Elektro
Manan, Saiful
PSD III Teknik Elektro
Eva Noviana, Saiful Manan, in paper otomatic drug muller based on ATMEGA16 mikrokontroler with LCD monitor explain that in a pharmacy a pharmacist made in accordance with the prescription drugs that have been recommended from the doctor to the patient. The drug is sometimes exist in the form of capsules, so the pharmacist must erode the drug first. Usually the process is still done manually which is less saves time. Because in today's tools - the tools are completely automated. With Automatic Tool muller Drugs Accompanied ATmega16 AVR Microcontroller Based LCD Display is possible to ease the burden on pharmacists, where the application is made up of four series, namely a series of push buttons, ATmega16 AVR microcontroller series, LCD series, muller motor driver circuit. Push button as input in the form of a pushbutton. ATmega16 AVR microcontroller as the central control input and outputan the grinding process medication. LCD ( Liquid Crystal Display ) as output capable of displaying output characters , either letters or numbers. Muller motor driver as government Universal AC to drive the motor. As for writing the program used in this application using C language C language is the software that becomes part of the system which are programs that regulate the working of the microcontroller ATmega16 and overall hardware (hardware ) is connected to the microcontroller ATmega16.
Keywords : ATmega16 AVR microcontroller, LCD, muller motor driver.
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8914
Gema Teknologi; Vol 17, No 1 (2012): April 2012 - October 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8975
2020-04-17T20:12:36Z
gema_teknologi:ART
"150401 2015 eng "
2656-582X
0852-0232
dc
KOORDINASI SETTING RELAI ARUS LEBIH PADA INCOMING 2 KUDUS TERHADAP OUTGOING KUDUS 5 DAN 6 YANG MENGGUNAKAN JARINGAN DOUBLE CIRCUIT DI GI 150 KV KUDUS
Wardani, Sartika Kusuma
PSD III Teknik Elektro
Subali, Subali
PSD III Teknik Elektro
Sartika Kusuma Wardani, Subali, in paper coordination of flow over relay setting in incoming 2 kudus to outgoing 5 and 6 using double circuit network on GI 150 KV kudus explain that PT PLN make every effort to improve service to customers , one of them by increasing the reliability of the distribution of electrical energy . Reliability of the distribution network is very important for both consumers and PLN. One measure of the reliability of the system / network is a factor SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interruption Frequency Index). Steps that have been done one way to minimize the possibility of interference is by installing protective devices on medium voltage networks. However, installation of protection equipment is not enough if the relay setting coordination between the incoming and outgoing imprecise. In fact in recent months, an interruption in the feeder distribution network which affects the incoming relay tripnya due to failure of the feeder protection system. One of the events that have happened several times is the same disorder in a double feeder circuit (network supplied from a single source by using two networks ( two feeder ) were included in the bus and in 1 pole) and holy 5 and 6 which causes the incoming PMT trip. It is very risky to happen, because the resulting trip relays at all incoming feeder that gets supply voltage of the incoming. So it takes coordination of overcurrent relay settings right so that the incidence of the incoming trip Sacred 2 does not happen again .
Keywords: distribution, protection, relay settings, incoming, outgoing
Vocational School Diponegoro University
2015-08-21 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8975
Gema Teknologi; Vol 18, No 2 (2015): October 2014 - April 2015
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21077
2020-04-17T20:16:09Z
gema_teknologi:ART
"181116 2018 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN SISTEM PENGONTROL BATCH MIXER PADA INDUSTRI MINUMAN DENGAN METODE PID BERBASIS ARDUINO UNO R3
Hati, Redi Permata
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Control Systems; Batch Mixer; Arduino Uno R3; Control PID (Proportional Integral Derivative);
Redi Permata Hati, Arkhan Subari, in this paper explain that batch Mixer is a tool that accommodates some of the raw materials to be mixed so that it becomes a usable product. Raw materials can be a liquid, solid and gas. The use of raw materials and way of mixing the raw materials that distinguish Batch Mixer design at each industry. In this thesis, design Batch Mixer consists of two tanks, namely the mixing tank and tank heaters. In the mixing tank, there HCSR-04 Ultrasonic sensor that functions as a detector of the level of the liquid level, and the stirrer motor-driven DC 12 V. While the heater tank, there MAX6675 Thermocouple temperature sensor and heater. There are also three pumps that pump fluid 1, pump 2 and pump fluid mixing. Batch Mixer working process is controlled automatically using the Arduino Uno R3 displayed via HMI Raspberry Pi. The use Arduino Uno R3 allows users to create a variety of issues related to the microcontroller. The control system is used to control the work process in a plant. The control system in the Batch Mixer works by two indicators: the water level and water temperature. In the manufacturing system, water temperature control using PID control (Proportional Integral Derivative) with PID tuning method to find the value of Kp, Kd, and Ki. Based on test results, use the most optimal value for use PID control value Kp = 60, Ki = 0.005 and Kd = 0.5. By using the value of the achievement level will be faster and the value of the maximum error of 2.5% is still within the tolerance limits of 3%.
Vocational School Diponegoro University
2018-11-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21077
Gema Teknologi; Vol 20, No 1 (2018): April 2018 - October 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21883
2020-04-17T20:15:21Z
gema_teknologi:ART
"171031 2017 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN ALAT PEMANTAUAN PENGATURAN KECEPATAN PUTAR MOTOR DC POWER WINDOWS BERBASIS PLC PANASONIC MENGGUNAKAN HUMAN MACHINE INTERFACE (HMI)
Anarwati, Agustin
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Panasonic PLC; Human Machine Interface (HMI); DC Power Motor Windows; PWM Driver;
Agustin Anarwati, Iman Setiono, today human life is very rapidly developing, one of them in the field of technology as time advances. This requires the creation of ideas to make a variety of equipment that is more practical and more reliable in meeting needs. In the industrial world today, most equipment uses PLC as a controller for various existing equipment, while the Human Machine Interface (HMI) is used to simplify monitoring existing equipment. In the automotive world, the power windows system is part of the body's electrical circuit which aims to make it easier for motorists to operate car windows. The driver can adjust the work of the power windows through a switch. When the driver presses the switch then the motor power window will rotate and will make the window work both open and close. The type of motor used in the power window system is a DC motor. One of the features of this DC motor is its speed can be controlled easily. In this case, I tried to make the design of the monitoring device setting the DC power speed of the windows power using PLC and HMI as monitors and controllers for operating the DC power windows rotating speed to make it easier, the speed can be adjusted through the output voltage from the PLC to the driver, starting from 0 VDC up to 5 VDC. if the voltage is 5 VDC then the motor will rotate with a maximum speed of 100%, whereas if given a 2.5 VDC input, the motor speed will be half of the 5 VDC rotational speed.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21883
Gema Teknologi; Vol 19, No 3 (2017): April 2017 - October 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21958
2020-04-17T20:14:14Z
gema_teknologi:ART
"161031 2016 eng "
2656-582X
0852-0232
dc
PENGATURAN PERGESERAN SUDUT FASA 120º SEBAGAI PEMBANGKIT GELOMBANG KOTAK PADA INVERTER TIGA FASA
Septiana, Adella Wulan
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Setiono, Iman
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Adella Wulan Septiana, Iman Setiono in this paper explain that Three phase electricity is widely used in large and home industries. However, not all industries or electricity users can enjoy three-phase resources because the installation is quite expensive. So that the use of a single phase to three phase electric converter is needed. One alternative that can be done is by making an inverter. The inverter is a hardware device that functions to convert direct current (DC) voltage into alternating current (AC) voltage. From the 220 VAC voltage enter the step up transformer then to the rectifier circuit so that the voltage generated is 380V. Then IC 555 is used as a box wave generator with a frequency output of 322.7 Hz. Then the output goes into the IC 74175 flip-flop circuit as a phase shift that produces three outputs, where each output has a high and low value with a frequency of 53.8 Hz. Output from rectifier and 74175 is used as input for IGBT drivers.
Keywords: three phase electricity, shift register, flip-flop 74175, inverter.
References
• Afrizal, Mokhamad Asrul & Ainur Rofiq. Perencanaan dan Pembuatan Modul Inverter 3 Phase sebagai Suplai Motor Induksi pada Penngembangan Modul Praktikum Pengemudi Listrik. Proyek Akhir D3 Teknik Elektro Industri. Surabaya: Politeknik Negeri Surabaya Institut Teknologi Sepuluh November.
• Agus Cahya & Dedid Cahya. Rancang Bangun Inverter 3 Fasa untuk Pengaturan Kecepatan Motor Induksi. Proyek Akhir Teknik Elektronika. Surabaya: Politeknik Negeri Surabaya Institut Teknologi Sepuluh November.
• Agus Rusdiyanto & Bambang Susanto. Perancangan Inverter Sinusoida 1 Fasa dengan Aplikasi Pemrograman Rumus Parabola dan Segitiga sebagai Pembangkit Pulsa PWM. http://www.telimek.lipi.go.id/xdata/docs/BS18.pdf.
• Erfan, JC. 2016. Inverter 3 Fasa 220 Volt dengan Output Sinusoidal Frekuensi 50 Hz menggunakan Arduino dengan Teknik Direct Synthesis. Tugas Akhir S1 Teknik Elektro. Surakarta: Universitas Muhammadiyah Surakarta.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21958
Gema Teknologi; Vol 19, No 1 (2016): April 2016 - October 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/367
2020-04-17T20:07:06Z
gema_teknologi:ART
"101024 2010 eng "
2656-582X
0852-0232
dc
PENGARUH CACAT LAS PADA SAMBUNGAN PIPA BAWAH LAUT (GIRTH WELD) DENGAN MENGAPLIKASIKAN FAILURE ANALYSIS DIAGRAM (FAD)
Suyadi, Suyadi
Suyadi, An under sea pipe connection (girth weld) is an area that possibly will get defect. This weld defects have a potential for causing tension concentration, so that there will be preliminary crack. This crack will spread due to cyclic loads received by the structure. This final assignment research is performed for evaluating mechanical integrity and girth weld having weld defect using method of Failure Analysis Diagram (FAD) and it takes a sample of case for South Sumatra West Java pipe belongs to PGN Co.Ltd. FAD is a method, which is good enough for evaluating the integrity of pipe structure having crack like flaw upon the weld. FAD divides two areas, namely safe area and unsafe area constructed by two axis, namely x axis that is stress ratio (Lr) and y axis that is stress intensity ratio (Kr). Stress ratio (Lr) is a ratio between a ref and a yield, mean while stress intensity ratio (Kr) is a ratio (stress intensity factor) between Kl and KIC (fracture toughness material). ANSYS 8.0 software is used for modeling by considering that the defect is in the form of semi elliptic with a/2c variation, that is 0,0469; 0,0938; 0,01406; and 0,1750. The loading upon the pipe is considered as the minimum loading (pull = 8284.25 psi), medium (pull = 41421.25 psi) and maximum (pull = 82842.5 psi). From the analysis result, it is obtained that crack dimension with a/2c 0.175 is not safe upon minimum and medium loading, mean while upon the maximum loading condition, all modeled cracks dimensions cause the pipe is not safe. Keywords : pipeline, girth weld, semi elliptical defect, FAD.
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/367
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/24532
2020-11-05T09:35:25Z
gema_teknologi:ART
"191031 2019 eng "
2656-582X
0852-0232
dc
PENENTUAN FAKTOR BERPENGARUH PADA EKSTRAKSI RIMPANG JAHE MENGGUNAKAN EXTRAKTOR BERPENGADUK
Anggista, Giovani
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Pangestu, Ilyas Teguh
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Handayani, Dwi
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Yulianto, M. Endy
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Astuti, Septi Kusuma
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Extraction; Ginger; Gingerol; Spectrophotometer; Temperature
Giovani Anggista , Ilyas Teguh Pangestu, Dwi Handayani, M. Endy Yulianto, Septi Kusuma, in this paper explain that the main part of ginger used is rhizome. Processed ginger products that can be developed are ginger oleoresin which contains components of gingerol, shogaol, zingerone, resin and essential oils. Ginger oleoresin content ranges from 3.2 - 9.5%, while the content of gingerol in oleoresin is between 14-25% and shogaol between oleoresin. 2.8-7.0%. Considering the benefits of high-antioxidant ginger which functions as an anti-inflammatory and prevents tumor growth, it is necessary to extract the ginger rhizome. The purpose of this study was to determine the factors that most influence the extraction of gingerol from the ginger rhizome using a stirred extractor and relatively good conditions. Experiments were carried out with various solvents, pH and temperature. Solvents 4 liters and 8 liters, pH 4 and 6 and temperatures 60oC and 100oC. The Gingerol content is measured by a VIS spectrophotometer. The most influential factor in extraction of ginger was determined by experimental design 23. The analysis of the results showed that for extracting 500 grams of powdered ginger using water as a solvent, the most influential factor was pH, in this case, at pH 6 containing 4% ginger.
Vocational School Diponegoro University
2019-10-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/24532
Gema Teknologi; Vol 20, No 3 (2019): April 2019 - October 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4715
2020-04-17T20:08:54Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PENGKAJIAN SUHU RUANG PENYIMPANAN DAN TEKNIK PENGEMASAN TERHADAP KUALITAS BENIH KEDELAI
Indartono, Indartono
Program Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Indartono, in this paper explain that soybean seed quality decline if easy packaging and storage techniques are not good. This research aims to study the technique of packing and room temperature on soybean seed quality during the four months of storage. Research conducted at the Laboratory of Postharvest and Alsintan, BPTP Central Java, with a Completely Randomized Design 3 (three) factors and two replications. The first factor varieties (Burangrang, Willis, and Baluran), the second factor technique packaging (vacuum and without vacuum), and the third factor storage temperature (27-29 ° C and 6 ° C). During the four storage observed changes in water content, shrinkage and the weight of soybean seed germination. The results showed that the shrinkage weight, water content and temperature of storage space does not give real effect to the power of germination for 4 four months of storage, and storage techniques vacuum (vacuum) to give an average power of germination is higher than without vacuum treatment, but a statistically not significantly different from other treatments by Duncan's test 95% confidence level for all varieties
Key words: soybean, room temperature storage, packaging techniques, the germinated
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4715
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/33082
2020-11-12T22:08:29Z
gema_teknologi:ART
"201030 2020 eng "
2656-582X
0852-0232
dc
PENILAIAN IT SERVICE MANAGEMENT PADA INFRASTRUKTUR TEKNOLOGI INFORMASI PT. TELKOM KOTA BENGKULU MENGGUNAKAN ITIL V3
Mahdalena, Desi
Program Studi Teknik Informatika, Universitas Bina Darma
Cholil, Widya
Program Studi Teknik Informatika, Universitas Bina Darma
IndiHome; ITIL; ITSM; Maturity Level; Service
IT Service Management (ITSM) is a management concept in providing information technology services properly and successfully to customers, it can also be a method of processing philosophical systems that are centered on the IT service consumer perspective on the company's business. The service management of an organization is basically implemented in the form of the functions of the organization's functions (functions) and the processes that are carried out (processes) in managing and changing the resources (resources) of the organization into the values expected by the customer. ITIL or the summary of the Information Technology Infrastructure Library is a general framework that describes best practices that provide guidance on how Information Technology (IT) service providers should run IT service management. One of the organizations that provide IT services is PT. Telkom, which has an IndiHome application for customers who want to use internet or cable TV services. This research evaluates maturity level the information technology infrastructure that supports IndiHome's business processes at PT. Telkom Bengkulu. So that with this assessment can see the achievement of performance at PT. Telkom Bengkulu. The focus of this research is the domain service operation on ITIL V3.
Vocational School Diponegoro University
2020-11-11 15:02:23
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/33082
Gema Teknologi; Vol 21, No 1 (2020): April 2020 - October 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8815
2020-04-17T20:10:13Z
gema_teknologi:ART
"121001 2012 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN ANTENNA WAJANBOLIC DENGAN DIAMETER 46 CENTIMETER PADA FREKUENSI 1900 MHz UNTUK MEMPERKUAT PENERIMAAN SINYAL WCDMA
Nafik, Ichsyan
PSD III Teknik Elektro
Yuniarto, Yuniarto
PSD III Teknik Elektro
Ichsyan Nafik, Yuniarto, in paper a 1900 MHz, 46 cm wajanbolic antenna design to strengthen wcdma signal reception explain that the antenna is a device used to transmit or receive electromagnetic waves electromagnetic waves. Reception using an antenna will amplify the signal acquisition in accordance with the ability of the antenna itself. Signal instability that often occurs in WCDMA networks makes the need for strengthening the acquisition of the signal is very large. Antenna Wajanbolic is one option reinforcement signal acquisition. In WCDMA networks, downlink frequency used at 2100 MHz, while the uplink frequency to 1900MHz. Antenna wajanbolic Must ditune to resonate in the uplink frequency is 1900 MHz. The final project focuses on making wajanbolic antenna for Line of Sight (LoS) who works at a frequency of 1900 MHz for WCDMA (3G). In accordance with the name wajanbolic antenna, this antenna uses a reflector from the pan, with a waveguide of modified pipes are coated with aluminum duct tape, and a signal receiver using a USB 3G modem. From the results of the testing and analysis of the results showed that wajanbolic antenna is directional antenna that has the directivity signal. This wajanbolic got an antenna gain of 16 dB value.
Keyword: wajanbolic antenna, WCDMA, Line of Sight (LOS)
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8815
Gema Teknologi; Vol 17, No 1 (2012): April 2012 - October 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8925
2020-04-17T20:11:28Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PEMBUATAN PULP DENGAN MEMANFAATKAN LIMBAH KULIT DURIAN (DURIO ZIBETHINUS MURR) DENGAN CAMPURAN (RESINA COLOPHONIUM) GUNA MENCEGAH DEGRADASI LINGKUNGAN
Kurniawan W, Deddy Kurniawan W
PSD III Teknik Kimia
Arifan, Fahmi
PSD III Teknik Kimia
Adim, M. Dwi Khoirun
PSD III Teknik Kimia
Deddy Kurniawan W, Fahmi Arifan, M. Dwi Khoirun Adim, in this article explain that paper is one of the primary needs for humans today . High paper usage is resulting increased in production of paper . On the other hand, paper which are usually made from cellulose and hemi-cellulose in wood can result environmental degradation , due to the use of wood and tree felling leads to long-term basis that can increase the temperature of the earth surface ( global warming) . Durian is relatively abundant in Indonesia , durian shell contains high cellulose ( 50-60 % ) and lignin content ( 5 %), also a low starch content ( 5 % ) . Durian shell wastes containing fibre with dimensions of length and fiber thick wall that be able to bind well when given a synthetic adhesive or an adhesive mineral . Pulp which is produced from durian shell waste in experiments were 1 , 2 , 3 and 4, have a value of α - cellulose content of 35 % , 45 % , 27.7 % , 37.5 % and 57.6 %, respectively. When yield value of 49.2 % , 66.8 % and 48.2 % respectively.
Keywords: pulp, durian, gondorukem, digester
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8925
Gema Teknologi; Vol 17, No 3 (2013): April 2013 -October 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8936
2020-04-17T20:12:14Z
gema_teknologi:ART
2656-582X
0852-0232
dc
SIMULATOR KUBIKEL MINIMUM UNTUK INVESTIGASI GANGGUAN SCADA SISTEM DISTRIBUSI TENAGA LISTRIK 20 KV
Prasetiyo, Wahyu Adi
PSD III Teknik Elektro
Winarno, Heru
PSD III Teknik Elektro
Wahyu Adi Prasetiyo, Heru Winarno, in this paper explain that with the SCADA system delivery and processing of data from substation equipment consisting of equipment protection, control and measurement becomes faster known by the operator (dispatcher). Measurement and status information indicative of the electric power system are collected in RTU is placed in the substation (GI) which is then sent to the SCADA Master Station.Kinerjasistem dipengaruhiolehpopulasigangguan happened. The more the population of nuisance, then it will significantly reduce the level of reliability of the distribution network which is under the control of the SCADA system. SCADA interference in the distribution of electrical power distribution systems 20 kV affect the level of reliability of the distribution network. Especially if the disturbance of the telecontrol Circuit Breaker. To repair SCADA telecontrol especially the disruption of the necessary investigative trials open close CB, but in emergency situations CB load shedding can not be done with the many considerations. Simulator cubicles with Circuit Breaker Dummy serves to replace the function of the actual CB in order to do the test cubicles control of SCADA without load shedding. By removing the SCADA communication in cubicles and then move it to the CB Dummy testing/investigation disorder can be performed optimally. This tool is equipped with IED Digital Meter Relay Protection and SCADA based so that in addition to the investigation failed control can also be used for investigations and telesignal telemetering disorders.
Keywords: scada, investigations, reliability.
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8936
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/19153
2020-04-17T20:15:51Z
gema_teknologi:ART
"180430 2018 eng "
2656-582X
0852-0232
dc
KOREKTOR FAKTOR DAYA OTOMATIS PADA INSTALASI LISTRIK RUMAH TANGGA
Yuniarto, Yuniarto
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Ariyanto, Eko
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
power factor; capasitor; inductive load; integraton;
TL lamps, electric motors, Air Conditioner (AC), and other electrical equipment which is widely used for industry and households. Where all the electrical equipment is a burden that is inductive. As a result of the use of an inductive load, causing the falling value of the electrical power factor mounted on the customer can not be used optimally. To overcome this, in this thesis, has created a tool to correct the power factor value automatically. To improve the power factor, is used capacitors mounted in parallel to the load. By using the integrator, it can be obtained how large capacitor must be mounted parallel to the load according to the inductive load changes resulting in improved power factor value. Test results showed that an increase in the value of power factor from 0.34 to 0.95.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/19153
Gema Teknologi; Vol 19, No 4 (2018): October 2017 - April 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21878
2020-04-17T20:15:01Z
gema_teknologi:ART
"171031 2017 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN SISTEM MONITORING KETINGGIAN AIR DAN KELEMBABAN TANAH PADA PENYIRAM TANAMAN OTOMATIS DENGAN HMI (HUMAN MACHINE INTERFACE) BERBASIS RASPBERRY PI MENGGUNAKAN SOFTWARE NODE-RED
Wiguna, Esa Hayyu
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Monitoring System; Human Machine Interface (HMI); Raspberry Pi; Node-RED;
Esa Hayyu Wiguna, Arkhan Subari, in this paper explain that the monitoring system is a system used to monitor and control work processes in a plant design. This system is widely used and applied in the industrial world to find out the performance of a plant. To do the monitoring system, a lot of software can be used, which is then called the HMI (Human Machine Interface). The monitoring system with an interface in the form of HMI can be presented in various forms, such as buttons, or can also be displayed in the visualization of the plant while working. This monitoring system through an HMI interface uses supporting hardware in the form of a Raspberry Pi as a device to process the data that will be displayed on the display screen, while displaying its visualization uses an LCD touch screen. This LCD touch screen is connected to the Raspberry Pi via the LCD driver. The graphic form that will be displayed on the LCD touch screen is designed using Node-RED software. The visualization that will be displayed on the Touch Screen LCD will be adjusted to the working system of automatic plant sprinklers. This monitoring system using an HMI interface can display the plant's working system through indicators of water level and soil moisture. To test tube 2 water level measured through ultrasonic sensors through HMI has an error ratio of 1.01%, while for soil moisture measured through soil moisture sensors has an error ratio of 1.51%.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21878
Gema Teknologi; Vol 19, No 3 (2017): April 2017 - October 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21934
2020-04-17T20:13:20Z
gema_teknologi:ART
"151031 2015 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN MINIATUR TEMPAT PARKIR DENGAN METODE ELEKTRONIK PARKING PRICING (EPP) BERBASIS ARDUINO UNO
Raflianto, Gasa
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Sasmoko, Priyo
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Gasa Raflianto, Priyo Sasmoko, in this paper explain that design of miniature electronic methods parking place with parking pricing (EPP) based arduino uno created by looking at the problems that occur at this time, Berparkir is something that is often encountered in everyday dikehidupan. sometimes it is crucial to find the solution in order to provide convenience and comfort for the driver of the vehicle as well as the efficient use of parking space limitations. A lot of wasted time and sometimes quite a hassle just to queue entrance and exit of the parking lot during rush hour. Based on these problems, the authors provide a solution by designing a tool that can enable people to berparkir without having taken the trouble to enter and exit the parking lot without having to waste time and tenaga.Sistem is also supported by the Arduino Uno as the brain to process data from RFID, infrared is used to instruct the servo and servo motor is used as a parking portal.
Keywords:, Servo, RFID, Infrared Sensor.
References
• Anonim. Sensor. 5 agustus 2015. https://id.wikipedia.org/wiki/Sensor
• Isyanto, Jazi Eko. 2014. Pengantar Elektronika dan Instrumentasi Pendekatan Project Arduino dan Android. Yogyakarta: ANDI.
• Koestoer, Raldi Artono.2004. Pengukuran Teknik. Jakarta: Departemen Teknik Mesin Fakultas Teknik Universitas Indonesia.
• Massimo dkk., Arduino/Genuino Uno, 29 juli 2015.
• Purnama , Agus, Kapasitor, 28 juli 2015
• Purnama , Agus, motor servo, 28 juli 2015
• Varlag,Zum, RFID, 28 juli 2015
• Van Vlack. Lawrench, Ilmu dan Teknologi Bahan, Erlangga, hal 186
• Zona elektro, Pulsa kendali motor servo, 28 juli 2015
• Zona elektro, Komponen led Inframerah, 27 juli 2015.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21934
Gema Teknologi; Vol 18, No 3 (2015): April 2015 - October 2015
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/362
2020-04-17T20:06:43Z
gema_teknologi:ART
"101024 2010 eng "
2656-582X
0852-0232
dc
PENINGKATAN KANDUNGAN P2O5 PADA PUPUK POSPAT ALAM DENGAN AKTIVASI YEAST (SACCAROMYCES CEREVICEAE)
Supriyo, Edy
Edy Supriyo, Mountainous area of Kendeng is known rich with their natural resources, one of which is phosphate. Phosphate element in form of tricalsium phosphate is not dissolved in water therefore it needs to be activated become monocalsium phosphate which is able to be dissolved in the water and can be used for plant to strengthen their root. As activator in hydrolisa reaction is yeast Saccaromyces cereviceae . The result of present work revealed that activation could be done using yeast after being in peak population. Optimum cultivation of yeast using 14o brix molasses give population of 1.8x.107 colonies/cm2. The optimum phosphate (P2O5) concentration increnement happened in subtrate of yeast of 120 grms that is 3,06 %. Key words : Activation, Natural Phosphate Fertilizer
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/362
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/23097
2020-04-17T20:16:43Z
gema_teknologi:ART
"190430 2019 eng "
2656-582X
0852-0232
dc
SIMULASI PENENTUAN LOKASI GANGGUAN SATU FASA PADA JARINGAN TEGANGAN MENENGAH 20 KV BERBASIS ARDUINO MEGA 2560 DILENGKAPI DENGAN MONITORING MELALUI VTSCADA
Ashifa, Danu Nur
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=_PO4HH0AAAAJ
Arduino Mega 2560; short circuit fault current; GFR; fault location;
Danu Nur Ashifa, Arkhan Subari in this paper explain that in a distribution network of 20 KV, short circuit interference often occurs. Short circuit interference will produce a fault current that is felt by protection equipment. Each fault current will differ depending on the distance of the interference. Determining the distance of interference can not be displayed in SCADA, SCADA will only display the amount of interference and which equipment works. Determination of distance is carried out after analysis by the officer. Based on this matter the compiler makes a simulation tool where the tool can monitor the location of the disturbance from the nearest protective equipment that feels a single phase short circuit interference. The simulation tool consists of Arduino Mega 2560 which functions as a control center. The input used is a potentiometer as a simulator of the impedance magnitude that occurs during a single phase short circuit where the potentiometer will provide input in the form of a signal. And Omron LY2N relay which functions as protection equipment. After the experiment, the results obtained are that the tool can determine the location of interference from the nearest protection equipment based on changes in the bits read by Arduino. The larger the bits read by Arduino, the more distant the interference occurs from the protection equipment. 125 bits will produce an Arduino impedance calculation of 2.6 ohms so that the fault location is 0 km from PMT while 1023 bits will produce an impedance calculation of 21.30 ohms so that the fault location is 4.5 km from SSO.
Vocational School Diponegoro University
2019-05-13 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/23097
Gema Teknologi; Vol 20, No 2 (2019): October 2018 - April 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4710
2020-04-17T20:08:14Z
gema_teknologi:ART
2656-582X
0852-0232
dc
AUDIT ENERGI PADA SEBUAH HOTEL
Ariwibowo, Didik
Program Studi Diploma III Teknik Mesin
Fakultas Teknik Universitas Diponegoro
Didik Ariwibowo, in this paper explain that energy audit activities conducted through several phases, namely: the initial audit, detailed audit, analysis of energy savings opportunities, and the proposed energy savings. Total energy consumed consists of electrical energy, fuel, and materials in this case is water. Electrical energy consumption data obtained from payment of electricity accounts for a year while consumption of fuel and water obtained from the payment of material procurement. From the calculation data, IKE hotels accounted for 420.867 kWh/m2.tahun, while the IKE standards for the hotel is 300 kWh/m2.tahun. Thus, IKE hotel included categorized wasteful in energy usage. The largest energy consumption on electric energy consumption. Largest electric energy consumption is on the air conditioning (AC-air conditioning) that is equal to 71.3%, and lighting and electrical equipment at 27.28%, and hot water supply system by 4.44%. Electrical energy consumption in AC looks very big. Ministry of Energy and Mineral Resources of the statutes, the profile of energy use by air conditioning at the hotel by 48.5%. With these considerations in the AC target for audit detail as the next phase of activity. The results of a detailed audit analysis to find an air conditioning system energy savings opportunities in pumping systems. Recommendations on these savings is the integration of automation on the pumping system and fan coil units (FCU). The principle of energy conservation in the pumping system is by installing variable speed drives (VSD) pump drive motor to adjust speed according to load on the FCU. Load variations FCU provide input on the VSD pumps to match. Adaptation is predicted pump can save electricity consumption up to 65.7%.
Keywords: energy audit, IKE, AC
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4710
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/28746
2020-11-12T22:07:37Z
gema_teknologi:ART
"201030 2020 eng "
2656-582X
0852-0232
dc
SISTEM INFORMASI LABORATORIUM BERBASIS WEBSITE DI PROGRAM STUDI D IV TEKNIK INFORMATIKA POLITEKNIK HARAPAN BERSAMA TEGAL
Nishom, M.
Politeknik Harapan Bersama http://orcid.org/0000-0003-0765-1044
Wibowo, Dega Surono
Politeknik Harapan Bersama
information systems; web-based apps; laboratory; uml; blackbox
Laboratory is one of the important components in a college, where scientific research, experimentation, development or scientific training activities and even teaching-learning activities are carried out in it, so that a good schedule of space usage management and information on the availability of equipment is needed to support the smooth operation of laboratory use. At present, the process of laboratory services in the Informatics Engineering department of Politeknik Harapan Bersama is still carried out in a conventional manner, where all spatial use activities are recorded in a book, making it ineffective and less efficient. This study aims to build a Laboratory Information System in the Informatics Engineering Department of Politeknik Harapan Bersama. Data collection was performed using the triangulation method. StarUML was chosen as a tool for modeling UML-based systems, and blackbox as a method for testing system functionality. The results of this study are Web-based Laboratory Information Systems. It is expected that with this information system, it can further improve the service and effectiveness of the use of laboratories in the Informatics Engineering Department.
Vocational School Diponegoro University
2020-11-11 15:02:23
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/28746
Gema Teknologi; Vol 21, No 1 (2020): April 2020 - October 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8810
2020-04-17T20:09:53Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
PERHITUNGAN KERUGIAN ENERGI PADA PENYULANG TAMBAK LOROK-03 SEBAGAI SALAH SATU PILOT PROJECT PROGRAM REVASS (REVENUE ASSURANCE) DALAM PROGRAM REKONSILIASI ENERGI PT. PLN (PERSERO) AREA SEMARANG
Putranti, Ruri Diana
PSD III Teknik Elektro
Setiono, Iman
PSD III Teknik Elektro
Ruri Diana Putranti, Iman Setiono, in paper calculation of energy losses of Tambak Lorok - 03 feeder as one of the pilot project program REVASS (revenue assurance) in energy reconciliation program of PT . PLN (persero) semarang area explain that in an electric power system there is a factor called the loss factor or energy depletion . This shrinkage can be found in various places on the electricity network , from generation, transmission and distribution of both to consumers . The release of energy or commonly referred to as shrinkage , the harm to the company for commercial and service in large and small quantities . Pond feeder Lorok - 03 is one of the feeders are thought to have a large enough energy depletion . This feeder is in the working area of PT . PLN Rayon East Semarang and is a feeder into the pilot established REVASS ( Revenue Assurance ) PT . PLN Semarang area . Based on mathematical calculations that have been carried out in February 2013 the amount of power loss in the feeder is 2,316,319 KWH , while in the month of March 2013 is 4,765,637 KWH and in April 2013 amounted to 18,809,238 KWH . The amount of power loss raises the average monthly percentage losses in the feeder that is between 10-20 % . This of course lead to a loss for the company , especially on the commercial side that is the size of the company to the customer's receivables . Therefore , a program in which reconciliation is REVASS this project , is one attempt to get the suitability amount of energy from the power sent to the power received at the customer .
Keywords : Electric Power System , Network Distribution , Energy Losses , Reconciliation of Energy
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8810
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/42560
2022-06-21T07:46:22Z
gema_teknologi:ART
"220621 2022 eng "
2656-582X
0852-0232
dc
Penerapan SCADA dan IoT Menggunakan PLC Sebagai Kontrol Motor AC untuk Pembelajaran Praktikum SMK
Bagenda, Dadan Nurdin
Elektronika, Politeknik Negeri Bandung https://sinta.ristekbrin.go.id/authors/detail?id=5984039&view=overview https://orcid.org/0000-0003-1814-3360
Basjaruddin, Noor Cholis
Elektronika, Politeknik Negeri Bandung
Programmable Logic Control, learning module, MQTT, Internet of Things
The problem at the current Vocational High School that often arises is the unavailability of the Supervisory Control And Data Acquisition (SCADA) practicum module, to control AC Motor which can also be monitored online (IoT support) to support industry 4.0. The following solutions: (1). The developed module must be remotely controlled with industry standards; (2). The method used during the practicum is the problem-based-learning (PBL) method. To implement the above problem, a PLC that support SCADA and IoT (MQTT) was chosen. To introduce SCADA and IoT to students, we learned how to operating a simple industry-standard SCADA software and IoT (Ubidots). Post-training from the results of the questionnaire for vocational students, it was seen an average increase in knowledge of 56% compared to before training, a min 42% increase in PBL understanding, and a max 64% increase in knowledge of "Wonderware Intouch" as one of the Industry Standard SCADA
Vocational School Diponegoro University
2022-10-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/42560
Gema Teknologi; Vol 21, No 3 (2021): April 2021 - October 2021
eng
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/download/42560/131104
Copyright (c) 2022 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8920
2020-04-17T20:11:07Z
gema_teknologi:ART
2656-582X
0852-0232
dc
APLIKASI JAVA DAN MYSQL PADA SISTEM INFORMASI MINIMARKET
Sanjaya, David Robby
PSD III Teknik Elektro
Yuniarto, Yuniarto
PSD III Teknik Elektro
David Robby Sanjaya, Yuniarto, in paper java and mysql application at minimarket information system explain that an endless human needs combined by their daily activities, made a lot of people reluctant to do shopping at a traditional market. Minimarket or supermarket that finally became a way out for this problem, because it had a good management system for organized the items and the transactions. Regulation of items and money at minimarket or supermarket require a good software. There are a lot of programming language that can be used for create this software, one of that is Java programming language. Java in this information system be used for create an interface to user while Mysql be used to manage a databases. Java programming language, Mysql, Netbeans and iReport are tools that applied to this Minimarket information system.
Keywords: Minimarket Information System, iReport, Java, Mysql, Netbeans.
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8920
Gema Teknologi; Vol 17, No 2 (2013): October 2012 - April 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8931
2020-04-17T20:11:52Z
gema_teknologi:ART
2656-582X
0852-0232
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STUDI KUAT TEKAN BETON DENGAN AGREGAT KASAR DARI BATU KAPUR
Hartono, Hartono
PSD III Teknik Sipil
Hartono, in this paper explain that to obtain the allowed characteristic compressive strength of concrete from a concrete construction is quite difficult , because it is influenced by the mix of materials used for the manufacture of the construction, in which the require material of the concrete mix had to be in accordance with Reinforced Concrete Indonesia Rule Year 1991. The main factor of mix material that affect permitted the compressive strength of concrete is aggregate characteristics, namely the coarse aggregate or crushed stone. Therefore this study is intended to determine the compressive strength of concrete with the characteristics of coarse aggregate material of crushed stone that comes from limestone. This research use Gresik PC mixture concrete, muntilan sand, and kricak of limestone. To determine concrete compressive characteristics strength of concrete, concrete specimen as many as 20 pieces, with mixed-use PC weight ratio of 1 : 2 Ps : 3, cube molded kricak with the size of 15 cm X 15 cm X 15 cm was made. From these results, it can be obtained that concrete compressive characteristic strength σ 1 bk = 215.41 kg / cm2.
Keyword: Concrete construction
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8931
Gema Teknologi; Vol 17, No 3 (2013): April 2013 -October 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/19147
2020-04-17T20:15:26Z
gema_teknologi:ART
"180430 2018 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN SISTEM ADMINISTRASI KERJA PRAKTEK DAN TUGAS AKHIR BERBASIS WEB MENGGUNAKAN FRAMEWORK CODEIGNITER
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Tadeus, Dista Yoel
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Winarno, Heru
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Yuwono, Teguh
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
web application; information system; MVC; codeigniter;
Information system is a set of components that interconnect, collect, process, store, and distribute information to support decision making and supervision within an organization. Today the information system can not be separated with computer technology that feels growing rapidly along with our increasingly complex needs. These developments can be seen from the many organizations or institutions in various fields that use computerized systems to perform various jobs quickly and with great accuracy. The use of computerized systems is expected to minimize errors made by humans thereby reducing large losses. And can mengefisienkan time in completing the work quickly and accurately. One concept of building a computerized information system is dengfan MVC model. Model-View-Controller (MVC) is a concept introduced by the inventor of Smalltalk (Trygve Reenskaug) to encapsulate data along with processing (model), isolate from the process of manipulation (controller) and view to be represented on a user interface . The MVC architecture has the benefit of separating between model and view allowing multiple views using the same model. As a result, an application model component is easier to implement, test, and maintain, because all access to the model runs through this component. One of the frameworks that works based on the MVC concept is Codeigniter. Codeigniter is an open source web application framework that is used to build dynamic php applications. The main purpose of Codeigniter development is to help developers to work on applications faster than writing all the code from scratch. Because of the superiority of codeigniter that the system of practical work administration and the final task is built using the framework..
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/19147
Gema Teknologi; Vol 19, No 4 (2018): October 2017 - April 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21863
2020-04-17T20:14:29Z
gema_teknologi:ART
"170430 2017 eng "
2656-582X
0852-0232
dc
SISTEM MONITORING VOLUME AIR MENGGUNAKAN SENSOR ULTRASONIK DAN MONITORING OUTPUT VOLUME AIR MENGGUNAKAN FLOW METER BERBASIS ARDUINO
Br Pelawi, Servinta Damayanti
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Manan, Saiful
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Ultrasonic Sensor; Buzzer; Flow Meter; Arduino Uno and HMI;
Servinta Damayanti Br Pelawi,Saiful Manan, in this paper explain that method of realization of making purification and monitoring volume of water, purification of water using small molecules such as sand, charcoal, cotton, etc. and monitoring the volume of water using the HC-SR04 ultrasonic sensor. where this ultrasonic sensor will detect the water inside the sensor distance sensor to objects that is 2cm and 25cm. When the water has reached the limit of 2cm and 15cm then the buzzer will light up giving a warning. and will display on the HMI in the form of cm, to run the pump we click the start button at hmi the pump will turn on and the water inside the reservoir will enter reverse osmosis, Ro will process water, clean water will be read by the flow meter, flow meter will detect incoming water and will display the results in the HMI in the form liter, and Arduino UNO is used as a control system for HMI output input signals, sensors, flow meters, and buzzers.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21863
Gema Teknologi; Vol 19, No 2 (2017): October 2016 - April 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21913
2020-04-17T20:13:54Z
gema_teknologi:ART
"160430 2016 eng "
2656-582X
0852-0232
dc
PROTOTIPE SISTEM AUTOBRAKE PADA MOBIL MENGGUNAKAN SENSOR JARAK ULTRASONIK HC-SR04 BERBASIS ARDUINO MEGA 2560
Hidayanto, Ari
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Winarno, Heru
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Ari Hidayanto, Heru Winarno in this paper explain that The high number of traffic accidents is currently a factor in the driver's error in driving (human error). One of the accidents that often occur include car accidents. Of the several incidents that have occurred, the average accident occurred because of the driver's lack of concentration in driving his car. This resulted in the driver not being able to control the speed of the vehicle immediately when there was a sudden object in front, moreover this happened when the vehicle drove at high speed. To avoid this, when driving, it really needs a vehicle security system that also greatly affects the driver's safety. With the development of existing science and technology allows humans to make security systems in motorized vehicles. Accidents due to driver negligence can be overcome by making the braking system automatic then the vehicle speed will slow down and carry out mechanical braking (disc brake) automatically based on the minimum distance of the car with the barrier even though the driver does not pull the brake lever. Realizing this, an autobrake system (automatic braking) was designed based on the distance of the car with the barrier using the HC-SR04 ultrasonic distance sensor. When between a sensor and a barrier at a distance of <= 70 cm, the central lock actuator will go forward and press the disc brake lever. System notifications will be displayed via 20X4 LCD, LED and Buzzer. The system work will be controlled by Arduino Mega 2560.
Keywords: Autobrake, Disc Brake, Ultrasonic sensor HC-SR04, Central Lock, LCD 20x4, Arduino Mega 2560
References
• Agus Setya Abadi, Delta. 2008. Sensor Ultrasonic Sebagai Alat Navigasi Robot Pemadam Api. Tugas Akhir PSD III Teknik Elektro (tidak diterbitkan). Semarang: Universitas Diponegoro.
• Bishop, Owen. 2004. Dasar-Dasar Elekrtonika. Jakarta: Penerbit Erlangga.
• Cahyo Saputro, Adi. 2014. Central Door Lock. Diunduh dari http://otomotifmaju.blogspot.com/2014/08/sentral-door-lock.html, pada 17 Juni 2015 pukul 21.46 WIB.
• Chan, Yefri. 2010. Teori Dasar Rem. Buku Panduan Teknik Mesin (tidak diterbitkan). Jakarta Timur: Universitas Darma Persada.
• Putu Giovani. I. 2014. Merancang Driver Motor DC. Diunduh dari http://www.geyosoft.com/2014/merancang-driver-motor-dc, pada 17 Juni 2015 pukul 08.00 WIB.
• Prayogo, Rudito. 2012. Pengaturan PWM dengan PLC. Tugas Mata Kuliah Teknik Otomasi (tidak diterbitkan). Malang: Universitas Brawijaya.
• Roghib, Rokhman, dan M. Qomarruzzaman. 2014. Introduction Arduino Training Kit. Yogyakarta: House Of Technology.
• Sandi. 2014. Acccumulator Atau Aki. Diunduh dari http://www.sandielektronik.com/2014/03/accumulator-atau-aki.html, pada 30 Mei 2015 pukul 16.15 WIB.
• Setyadi, Ary. 2010. Bahasa Indonesia Dalam Karya Ilmiah. Semarang: Fakultas Ilmu Budaya Undip.
• Sulistyowati, Riny. 2012. Perancangan Prototype System Kontrol Dan Monitoring Pembatas Daya Listrik Berbasis Mikrokontroler. Tugas Akhir Teknik Elektro (tidak diterbitkan). Surabaya: Institut Adhi Tama Surabaya.
• Tooley, Mike. 2003. Rangkainan Elektronik Prinsip dan Aplikasi Edisi Kedua. Jakarta: Penerbit Erlangga.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21913
Gema Teknologi; Vol 18, No 4 (2016): October 2015 - April 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/240
2020-04-17T20:06:25Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PEMBANGUNAN PEMBANGKIT LISTRIK TENAGA PANAS BUMI / GOETHERMAL ENERGY ( PLTPB )
Moediyono, Moediyono
Moediyono, in paper development of electrical generator from geothermal energy explain that the growth of electric need which rapidly, where as the price of BBM more increasingly, so on several years can worry about the electric generator which have now, especially which using the fuel fossil can not fulfill he need of electric stock on consumen Then, it need reconstruction the electric generator whic will suitable with government wisdom in energy seetor with be hrifly on using of BBM, and remembered the back up of BBM in Indonesia which had more thin. One of alternative energi resorces which can used is geothermal that many in Indonesia broad. Geothermal energi electric generator have several superiorrty compare with electric generator another, among other does not reed the oil material, easy towalk with environment and also have operational time that relative more than long and does not influence the weather. Keyword: geothermal energy, generator, PLTB
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/240
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/22136
2020-04-17T20:07:51Z
gema_teknologi:ART
"110430 2011 eng "
2656-582X
0852-0232
dc
PENINGKATAN KINERJA SISTEM PROPULSI KAPAL PENANGKAP IKAN TRADISIONAL TYPE PURSEINE 30 SD 90 GT MENGGUNAKAN SISTIM PROPULSI HYBRID
Ridwan, Mohd
Program Diploma III Teknik Perkapalan
Fakultas Teknik Universitas Diponegoro
Mohd Ridwan, in this paper explain that traditional fishing vessels built in the shipyard of the people is a cultural heritage which needs to be conserved, and empowered through the application of ship science and technology to build fishing boats for fishermen of all types, shapes and sizes of ships, equipped with fishing technology. Repairs to the feasibility of traditional fishing vessels to sail like stability, ship construction needs to be done. Similarly, his case should be applied to ship propulsion technology that remained operational needs based on size of vessel forms and types of fishing vessels. The design of an appropriate propulsion can provide benefits in the form of operational cost savings by more than 10% through the use of hybrid propulsion systems. Hybrid propulsion system is a mix of main engine (motor fuel or gas fuel MDO) with electric motor and propeller to suit the use of hull form and ship propulsion systems (matching the propeller and engine) is at the core of this concept in this article and next to be research. Besides these traditional ship the product to be supported primarily by imposing government standards for a fishing vessel, for fishermen as users can easily calculate the economic value of investment will they planted in fishing effort at sea.
Keywords : Fishing Boat Traditional, Hybrid Propulsion, Main Engine, Propeller, Operatinal Cost.
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/22136
Gema Teknologi; Vol 16, No 2 (2011): October 2010 - April 2011
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/4705
2020-04-17T20:07:56Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PENGEBORAN LEPAS PANTAI
Utomo, Budi
Program Diploma III Teknik Perkapalan
Fakultas Teknik Universitas Diponegoro
Budi Utomo, in this paper explain that offshore drilling carried out to obtain crude oil through the oil wells. The means that must exist in the operation of offshore drilling is a bridge structure (plate form) as a place to put the drilling equipment. Known two kinds of platforms, that is platforms permanent (fixed) which stands on the feet of reinforced concrete, and the bridge is not fixed like swamp barges, drilling ship (floaters) and jack-up rig.
Jack up rig is one of the offshore rigs that have the ability to elevation in accordance with a sea depth of drilling. Drilling equipment is a range of equipment that is prepared in such a way, so that such a drill rod, and all this equipment has a hole inside that allows for fluid or mud circulation.
Key word: Drilling equipment
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4705
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/29287
2020-05-29T15:02:39Z
gema_teknologi:ART
"200430 2020 eng "
2656-582X
0852-0232
dc
PENINGKATAN EFISIENSI ENERGI KIPAS SIRKULASI UDARA DI PANEL LISTRIK MELALUI PENGATURAN KECEPATAN
Tadeus, Dista Yoel
Str. Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.co.id/citations?user=nHnjf2wAAAAJ&hl=id&oi=ao
Mangkusasmito, Fakhruddin
Str. Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro
Electric Panel; Internal Panel Temperature; Fan Speed Control
Internal temperature of electric panel practically depend on the amount of power dissipation generated by the panel components and the outside temperature. If this equilibrium is not maintained then the internal temperature can increase too high beyond the working temperature limit for components so as to shorten the life of panel components. Generally, there are two fans installed to circulate the air inside the panel that operates at fixed speed. In order to improve fan energy efficiency, it is necessary to add a control system that can adjust the fan speed based on actual panel internal temperature. Efforts to increase energy efficiency are realized using cheap hardware and easily available on the market, the ATMEGA 8535 microcontroller and LM 35 temperature sensor. The fan speed is normalized in percent units and expressed virtually using the Pulse Width Modulation (PWM) signal value calculated by the proportional control algorithm inside the controller. The experimental results show that the PWM value can vary with actual panel internal temperature. Using the time constant temperature asumption k1 = 0.2, k2 = 0.4, k3 = 0.2, k4 = 0.2 and experimental data, it was shown by calculations that there was an increase in energy efficiency by 40.8%.
Vocational School Diponegoro University
2020-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/29287
Gema Teknologi; Vol 20, No 4 (2020): October 2019 - April 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4788
2020-04-17T20:09:31Z
gema_teknologi:ART
2656-582X
0852-0232
dc
MENGGAGAS SUATU KAWASAN INDUSTRI
Sutanto, Sutanto
Program Studi Diploma III Teknik Sipil
Fakultas Teknik Universitas Diponegoro
Sutanto, in this paper explain that industrial area is the area where the concentration of industrial activities whose existence the ideal should be integrated with other areas such as residential, office, education, economic activity and other agricultural green belt - the other. This industrial area should be equipped with infrastructure and other support facilities so as to serve the upstream to downstream processes. The necessary infrastructure and facilities such as office managers, environmental facilities, the network - a network of roads, electricity, telecommunications, sewage, water, fire and reforestation. For industrial buildings must meet the requirements of building height, building area coefficient referring to the City Master Plan.
Keywords: city master plan
Vocational School Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4788
Gema Teknologi; Vol 16, No 4 (2012): October 2011 - April 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/33448
2022-06-21T07:53:00Z
gema_teknologi:ART
"210430 2021 eng "
2656-582X
0852-0232
dc
EFEK PENAMBAHAN EVAPORATOR PADA ATMOSPHERE WATER HARVESTER (AWH) TERHADAP PERFORMA SISTEM
Mrihardjono, Juli
Program Studi S.Tr. Rekayasa Perancangan Mekanik, Sekolah Vokasi, Universitas Diponegoro
Ariwibowo, Didik
Program Studi S.Tr. Rekayasa Perancangan Mekanik, Sekolah Vokasi, Universitas Diponegoro
Sutrisno, Sutrisno
Program Studi S.Tr. Rekayasa Perancangan Mekanik, Sekolah Vokasi, Universitas Diponegoro
Tadeus, Dista Yoel
Program Studi S.Tr. Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro
water harvester; refrigeration; energy consumption; COP; MHI
Atmosphere Water Harvester (AWH) was investigated to get water collected from air in elevated performance. Improvement was performed by introducing a series-arrangement of two evaporators. Air flew through the evaporators in cross-flow. This arrangement would influence performance of the AWH system in title of COP, MHI, and specific energy consumption. The AWH was designed using vapor compression refrigeration system. Parameter measured to the system were refrigerant temperature in suction and discharge line, inlet and outlet pipe wall temperatures at evaporator and condenser, air velocity enter into evaporator, and electrical energy consumption. Instrument used in this research were refrigerant pressure-temperature gauge, K-type digital thermometer, digital fan anemometer, thermo-hygro meter, and kWh meter. Air temperature and RH data were 36,5 oC, 40%, and 19 oC, 42 % for inlet and outlet air stram at evaporator, subsequently. With air velocity 1.5 m/s, the COP of the system was 3.7. Water collected from AWH was 1.1 litres/hour with energy consumption of 1.24 kWh. The AWH could be considered as a water harvester with value of specific energy of 1.13 kWh/litre and MHI of 0,2.
Vocational School Diponegoro University
2021-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/33448
Gema Teknologi; Vol 21, No 2 (2021): October 2020 - April 2021
eng
Copyright (c) 2021 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8915
2020-04-17T20:10:39Z
gema_teknologi:ART
"121001 2012 eng "
2656-582X
0852-0232
dc
PEMROGRAMAN SISTEM PENGAMAN RUMAH OTOMATIS YANG TERHUBUNG DENGAN TELEPON SELULER BERBASIS MIKROKONTROLER ATMEGA8 DAN ATMEGA162
Pratama, Donny
PSD III Teknik Elektro
Subali, Subali
PSD III Teknik Elektro
Donny Pratama, Subali, in paper programming of auto home security system connected to mobile phone based on microcontroller ATMEGA8 and ATMEGA162 explain that in modernization era, almost all using automation tools, both in industrial, office, especially at home. Especially with the advance of age more unemployment also exist. With so many unemployed crime was more rampant. Therefore, the security of the home and its contents is very necessary for every homeowner. Especially when the house in a discharged condition or homeowners are doing activities outside the home. Home security system that uses a microcontroller-based mobile phone as a medium of information is a tool that is needed in every home. Where this system in any room in the home will attach several sensors are used to monitor the condition of the house. The sensors used include PIR sensor (Passive Infra - Red) to detect motion, gas sensors to detect a gas leak and also uses a temperature sensor to determine the temperature of the room. All these sensors are programmed according to the function of each tool. And as a basic programming language used compiler (Bascom) to support the work of all the sensors. For sensor work will then be processed by a microcontroller which will then be sent the information to a cell phone via a modem homeowners.
Keyword : home security systems, mobile telephone, microcontroller, ATMEGA8, ATMega162
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8915
Gema Teknologi; Vol 17, No 1 (2012): April 2012 - October 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8976
2020-04-17T20:12:39Z
gema_teknologi:ART
"150401 2015 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN SIMULASI DISPLAY ARUS GANGGUAN RELAI PROTEKSI SEL 551 DI MASTER STATION PADA SCADA SURVALENT SEBAGAI UPAYA MEMPERBAIKI SAIDI
Azhar, Dzulfikar Muhammad
PSD III Teknik Elektro
Yuniarto, Yuniarto
PSD III Teknik Elektro
Dzulfikar Muhammad Azhar, Yuniarto, in this paper explian that disruption of the power distribution network of 20 KV greatly influence the level of reliability of electric power system. Localize interference by means of network down one by one causing a long recovery time. As a result, SAIDI relatively high value. Protection Relays 551 SEL has a feature that can save the nominal fault current value last received. The value stored in the relay memory. Value of fault current can be processed into the distance nuisance. Thus, the fault current value can help officers to track the fault location based on distance. SCADA as a system that monitors and controls the electrical power system equipment remotely in real time on duty to display the current value of disturbance located at 551 SEL protection relays to be sent to the Control Center or the Master Station.
Keywords : SCADA, fault current, relay protection 551 SEL
Vocational School Diponegoro University
2015-08-21 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8976
Gema Teknologi; Vol 18, No 2 (2015): October 2014 - April 2015
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21078
2020-04-17T20:16:13Z
gema_teknologi:ART
"181116 2018 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN SISTEM KENDALI ALAT PENYORTIR BARANG BERWARNA MERAH DAN HIJAU DENGAN SENSOR TCS230 BERBASIS PLC SCHNEIDER
Tarigan, Agri Denada Br
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Temperature regulation; industrial temperature controller; ON-OFF control; PID;
Agri Denada Br Tarigan, Iman Setiono, in this paper explain that temperature regulation is one of the most important needs for the industry. Lots of processes and production are carried out under certain temperature conditions and free from interference. Industrial temperature controller is one of the basic equipment to meet these needs. On the market there are various types, specifications, and brands of temperature controllers, but have similarities with one another mainly lies in the basic functions of temperature regulation capabilities. This article describes the background of industrial temperature controllers principal, also covers control concepts, basic controller configurations, control methods, actuator equipment support, and examples of sensor parameter settings and controls on the Autonics TC4S series temperature controllers.
Vocational School Diponegoro University
2018-11-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21078
Gema Teknologi; Vol 20, No 1 (2018): April 2018 - October 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21908
2020-04-17T20:13:28Z
gema_teknologi:ART
"160430 2016 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN EXTERNAL ELECTROMAGNETIC RETARDERS SYSTEM PADA MOTOR 1 PHASA
Dewantara, Bima Dicky Anugrah
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Manan, Saiful
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Bima Dicky Anugrah Dewantara, Saiful Manan, in this paper explain that Electromagnetic retarders are generally known as electromagnetic inhibitors or brakes, the braking system eliminates most braking mechanics, thereby reducing conventional braking systems. Safety requirements and safety systems are developed and become a focal point of an equipment. Electromagnetic brakes are a safety component with a control system that is easy to control. With this electromagnetic brake, it will reduce maintenance costs, because it only requires a factor of electricity to be able to move it. The braking system uses electromagnetic forces to slow down a movement, which is generally a shaft motion. A dish with non-ferromagnetic metal material is attached to a rotating shaft. The disk is flanked by the side of the stator in the form of an electromagnetic coil system that can generate a magnetic field from electricity. Electric current generates a magnetic field in the coil. And the metal plate that cuts the magnetic field will cause eddy currents on the disk itself. This eddy current will generate a magnetic field whose direction is opposite to the previous magnetic field, thus inhibiting the rotary motion of the shaft. In designing, experimenting and making an External Electromagnetic Retarders System Design on 1 Phase Motor, use the NE 555 IC as the control duty cycle. So that the relationship between braking current and braking time is inversely proportional if the higher the current, the shorter the time it takes for the rotor to stop. And the relationship between braking current and motor current is directly proportional, by increasing the braking current will increase the load on the motor causing the motor current to increase.
Keywords: Electromagnetic Retarders, Electromagnetic Brakes, Eddy Flow Effect
References
• Tipler, P. 2008. Physics for Scientist volume 2. New York : WH Freeman and Company..
• Ishaq, M. 2007. Fisika Dasar Elektisitas dan Magnetisme. Yogyakarta: Graha Ilmu.
• Millman, Halkias, M.Barmawi, dan M.O.Tjia. 1971. Integrated Electronics:Analog and Digital Circuits and Systems. Jakarta : Erlangga.
• Ramdhani, Mohamad. 2008. Rangkaian Listrik. Jakarta : Erlangga.
• Bishop, Owen. 2004. Dasar-Dasar Elektronika. Jakarta : Erlangga.
• Halliday, David. Robert Resnick. 1978. Fisika Jilid II Edisi Ketiga. Jakarta : Erlangga
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21908
Gema Teknologi; Vol 18, No 4 (2016): October 2015 - April 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21959
2020-04-17T20:14:20Z
gema_teknologi:ART
"161031 2016 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN SISTEM MONITORING KEAMANAN RUMAH BERBASIS WEB MENGGUNAKAN RASPBERRY PI B+ SEBAGAI SERVER DAN MEDIA KONTROL
Syabibi, Muhammad Khoiru
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Subari, Arkhan
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Muhammad Khoiru Syabibi, Arkhan Subari in this paper explain that Along with the progress of era, the development of advanced technology also impacts on the development of security systems. Sophisticated security systems that digitally integrated has been growing, one of them is a web-based security system. This web-based home security monitoring system uses a raspberry pi b + that serves as a server and media controller, then for the web programming, it uses HTML, CSS and Javascript. This web-based home security monitoring system home uses a webcam (web camera) that functions like CCTV which can be monitored via a web browser, magnetic switch as security detector, keypad as access control to turn off security monitoring system for 10 seconds, and the buzzer and LED as security indicators. When someone enter the house, he/she must press the keypad. If keypad input is correct according to the passcode then the LED will turn off, indicate that home security monitoring system off for 10 seconds. If he/she enter the house without pressing the keypad according to the passcode then when the door opens, a switch magnetic will active, then buzzer will sound and the indicator on the web will change, indicate that he/she is a person who will do the crime.
Keyword : raspberry pi b+, webcam, magnetic switch, keypad, buzzer and LED.
References
• Andre. 2014. Sejarah PHP dan Perkembangan Versi PHP. http://www.duniailkom.com/sejarah-php-dan-perkembangan-versi-php.
• Apache Software Foundation. About the Apache HTTP Server Project. http://httpd.apache.org/ABOUT_APACHE.html.
• Arfa. 2014. Akses Kontrol Kendaraan Bermotor Roda Empat Menggunakan Password dan Sensor. Skripsi. Jakarta: STMIK Raharja.
• Aziz, Abdul. 2012. Pengertian, Fungsi, Serta Cara Kerja Web Server. http://www.dedeerik.com/pengertian-fungsi-serta-cara-kerja-web-server.
• Baharudin, M. 2011. Pengertian Website. http://www.naevaweb.com/pengertian-website/arsip.html.
• Cox, Tim. 2014. Raspberry Pi Cookbook. Birmingham: Packt Publishing.
• Embedded Linux Wiki. Raspberry Pi, Low-level Peripherals. http://elinux.org/RPi_Low- level_peripherals.
• Embededdlinux. Raspberry Mode B-Block diagram. Diunduh http://embeddelinux01.com.
• Faizal. 2011. Prinsip Kerja Piezoelectric. http://www.insinyoer.com/prinsip-kerja-piezoelectric.
• Friedl, Stave. 2015. Secure Linux/Unix Access With Putty and Open SSH. http://unixwiz.net/techtips/putty-openssh.html/2015.
• Gudang Linux. 2011. Python. http://gudanglinux.com/glossary/python.
• Gurevich, Vladimir. 2011. Electric Relays: Principles and Applications. London: CRC Press.
• Harian Android. 2014. Pengertian dan Fungsi SD Card. http://www.harianandroid.com/2014/04/pengertian-dan-fungsi-sd-card.html.
• Heranudin. 2011. Rancang Bangun Sistem Keamanan Ruangan Menggunakan Radio Frequency. Skripsi. Depok: FT UI.
• Iswan, Agusta. 2012. Sistem Proteksi Brankas Berpassword Menggunakan Magnetic Doorlock sebagai Penggerak Doorstrike Berbasis Mikrokontroller. Tugas Akhir D3 Teknik Elektro. Semarang: FT UNNES.
• Kho, Dickson. 2012. Dioda dan Fungsi Dioda. http://teknikelektronika.com/-dioda-fungsi-dioda.
• Kho, Dickson. 2012. Pengertian LED (Light Emitting Diode) dan Cara Kerjanya. http://teknikelektronika.com/pengertian-led-light-emitting-diode-cara-kerja.
• Kho, Dickson. Pengertian Resistor dan Jenis Resistor. http://teknikelektronika.com/pengertian-resistor-jenis-jenis-resistor.
• Komponen Elektronika. 2011. Rangkaian Buzzer. http://komponenelektronika.com/rangkaian- buzzer.html.
• MS-1 Magnetic Door Switch datasheet. http://www.braude.ac.il/files/departments/electrical_electronic_engineering/labs/data_pages/p3.pdf
• Nasih, Muhammad Usman. 2013. Alat Pengaman Kendaraan Bermotor Menggunakan Password dan SMS. Tugas Akhir. Yogyakarta: STMIK El Rahma.
• Özcan, Yakut. 2014. Piezoelektrik.
• Paul Malvino, Albert. 2010. Prinsip-Prinsip Elektronika. Jakarta: Erlangga.
• Pemrograman Komputer. 2012. Petunjuk Praktikum Pemrograman Komputer. Semarang: D3 Teknik Elektro UNDIP.
• Prayitno, Indra. 2010. Kupas Tuntas Malwar. Jakarta: Elex Media Komputindo.
• Raspberry Pi Fondation. GPIO Raspberry Pi Model A dan B. https://www.raspberrypi.org/documentation/usage/gpio/2009
• Raspberry Pi Fondation. Setting Up And Apache Web Server On A Raspberry Pi. https://www.raspberrypi.org/documentation/remote-access/web-server/apache.md.
• Raspberrry Pi Fondation. SSH Using Windows. http://raspberrypi.org/documentation/remote-access/ssh/windows.md/2014
• Richardson, Matt dan Shawn Wallace. 2015. Make: Getting Started with Raspberry Pi. Sebastopol: Maker Media.
• Robinson, Andrew dan Mike Cook. 2014. Raspberry Pi Projects. Chichester: John Wiley & Sons Ltd.
• Rohiman, Ao. 2011. Pengertian dan cara kerja router.http://www.catatanteknisi.com/2011/05/pengertian-cara-kerja-router.html.
• Sidik, Betha. 2011. Javascript. Jakarta: Informatika.
• Wahyu. Pengertian Webcam dan Fungsinya. http://wahyu.blog.fisip.uns.ac.id/2011/12/06/pengertian-web-cam-dan-fungsinya.
• Wikipedia. Secure Digital. https://en.wikipedia.org/wiki/Secure_Digital#Micro.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21959
Gema Teknologi; Vol 19, No 1 (2016): April 2016 - October 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/368
2020-04-17T20:07:11Z
gema_teknologi:ART
"101024 2010 eng "
2656-582X
0852-0232
dc
FOR WORK / BEKISTING PADA BANGUNAN GEDUNG BERTINGKAT
Darma, Budhi
Budhi Dharma, in this paper explain that to get a good concrete structure form, need the existence of making of work form (bekisting) the goodness. In this case accuration, strength and also the supporter structure of having to enough of strength. To facilitate installation and also time efficiency in execution of unloading and installation need a correct and good construction. Keywords:bekesting, structure strength
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/368
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/25641
2020-11-05T09:35:25Z
gema_teknologi:ART
"191031 2019 eng "
2656-582X
0852-0232
dc
PENGAMBILAN KEPUTUSAN UNTUK KUALITAS AIR PADA TAMBAK UDANG MENGGUNAKAN FUZZY LOGIC CONTROL
Dwisaputra, Indra
Program Studi D-IV Teknik Elektronika, Politeknik Manufaktur Negeri Bangka Belitung
Rolastin, Boy
Program Studi D-III Teknik Perawatan dan Perbaikan Mesin, Politeknik Manufaktur Negeri Bangka Belitung
Irwan, Irwan
Program Studi D-IV Teknik Elektronika, Politeknik Manufaktur Negeri Bangka Belitung
Sateria, Angga
Program Studi D-III Teknik Perawatan dan Perbaikan Mesin, Politeknik Manufaktur Negeri Bangka Belitung
Shrimp Pond; Water Quality; Decision Making; Fuzzy Logic Control;Logic Control;
Indra Dwisaputra, Boy Rolastin, Irwan, Angga Satera, in this paper explain that one commodity that can be used as a superior post-mining area such as Bangka Belitung is shrimp ponds. Touch of technology is needed because of high rainfall in this area so that changes in temperature, humidity, salinity and pH are more dynamic. Then we need a control to determine the water quality in shrimp ponds to avoid crop failure. This research was conducted by means of simulations to make it easier to analyze the results before applying. Fuzzy logic control (FLC) method is used for the water quality decision making system. By utilizing 3 input variables such as temperature, salinity and pH of water and output is an index of water quality from a scale of 0-100. The Mamdani method is applied to FLC with 27 fuzzy rules. The simulation results show that a change in one of the input variables can cause water quality to drop to 70. When there are changes in the two input variables, it can reduce water quality by 25.1. FLC can work well in decision making for water quality in shrimp culture.
Vocational School Diponegoro University
2019-10-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/25641
Gema Teknologi; Vol 20, No 3 (2019): April 2019 - October 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4783
2020-04-17T20:09:05Z
gema_teknologi:ART
2656-582X
0852-0232
dc
ANALISA KERETAKAN PADA KONSTRUKSI GELADAK UTAMA KM. ADRI XLIV
Djazuli Sa’id, Solichin
Program Studi Diploma III Teknik Perkapalan
Fakultas Teknik Universitas Diponegoro
Solichin Djazuli Sa’id, in this paper explain that ship KM. XLIV Adri is the kind of cargo ship (General Cargo). The ship has been designed in accordance with the rules and regulations of the class (Bureau of Classification Indonesia). From the results of the survey method of research vessel, discovered the damage to construction on the main deck, the cracks on the fulcrum side deck fit the front room and deck beams are broken the back of the main deck. Thus causing the curvature of the floor deck and it needs to be a replacement / repair of components damaged by construction ensuring shipping safety. From the calculation results and field studies, construction damage caused by welding is not good, cutting the material that is not true and the use of payload on the main deck in excess of the permitted capacity.
Key words: Cargo Ship , Construction Damages, Main Deck
Vocational School Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4783
Gema Teknologi; Vol 16, No 4 (2012): October 2011 - April 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/32467
2020-11-12T22:07:58Z
gema_teknologi:ART
"201030 2020 eng "
2656-582X
0852-0232
dc
PENINGKATAN KINERJA SISTEM E-LEARNING DALAM PERSPEKTIF UNIVERSITAS 4.0 MENGGUNAKAN KERANGKA IT BALANCED SCORECARD
Syafitri, Nadidah Ayu
Program Studi Teknik Informatika, Universitas Bina Darma
Herdiansyah, Muhammad Izman
Program Studi Teknik Informatika, Universitas Bina Darma
performance; quality analysis; IT Balanced Scorecar; E-Learning
Bina Darma University (UBD) as one of the university based information technology currently has been assisted by the use of IT in implementing its strategy. University 4.0 is a university that makes students as a learning center and assisted by the use of IT. UBD in conducting learning has been assisted by e-learning which is one of the benchmarks of 4.0 University perspectives. E-Learning implementation assists the learning process by students and lecturers. The performance of the e-learning system has not been measured. Measurements are performed to improve the quality of e-learning systems in the 4.0 university perspective. To perform analysis used the IT framework Balanced Scorecard consisting of four perspectives namely Corporate Contribution/Business Contribution, User Orientation, Operational Excellence and Future Orientation. The result of this research is an improved analysis of quality and strategies to improve the quality of e-learning systems in the 4.0 university perspective.
Vocational School Diponegoro University
2020-11-11 15:02:23
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/32467
Gema Teknologi; Vol 21, No 1 (2020): April 2020 - October 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8910
2020-04-17T20:10:16Z
gema_teknologi:ART
"121001 2012 eng "
2656-582X
0852-0232
dc
DESAIN AIRFOIL MENGGUNAKAN SOFTWARE CAEDIUM
Mangestiyono, Wiji
PSD III Teknik Mesin
Wiji Mangestiyono, in paper airfoil design use caedium software explain that caedium and its add-ons combine to form an easy-to-use Computational Fluid Dynamics (CFD) software system that can help to assess the performance of 3D model. Using Caedium add-ons can create any 2D or 3D geometry or import geometry from another CAD package. Then simulate how a gas (e.g. air) or liquid (e.g. water) will flow over and through geometry. Caedium is simple to learn and efficient to use. Every body can study how the physics of its model changes over time or as modify the model in real time. Caedium's unified simulation environment makes it easy to change the model on the fly and quickly see the results of the changes.
Keywords : Caedium, Airfoil, Computation Fluid Dynamics
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8910
Gema Teknologi; Vol 17, No 1 (2012): April 2012 - October 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8926
2020-04-17T20:11:32Z
gema_teknologi:ART
2656-582X
0852-0232
dc
ACR (AUTOMATIC CONTROL ROBOT) BERBASIS ATMEGA 8535 SEBAGAI APLIKASI MODEL ROBOT MENGGUNAKAN REL
Setiawan, Arif
PSD III Teknik Elektro
Subali, Subali
PSD III Teknik Elektro
Arif Setiawan, Subali, in this paper explain that a fixed rail track used as a railway line. Application of rail as a direct path not only to train. However, there are also robots that use rail movement path. Rail crossings are used as the robot is not made of steel, but a line. This robot uses a single rail line is black with a white stripe background of a width adapted to the sensor mounted on the robot. Photodiode sensor lines will be detected, and then transmitted to the microcontroller 8535 as the brain or the source of the instruction that has been programmed. 8535 will detect the sensor output and then process the data received to proceed to the Driver that is connected to the DC motor. The output of the microcontroller 8535 will also be displayed through the LCD as the display position of the sensor and input characters. As an added speed control robot 4x1 keypad which will give instruction in the form of characters into the Microcontroller.
Keywords: Rail, Sensor Photodiode, Microcontroller 8535, DC Motor Driver, LCD, Keypad, DC Motor.
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8926
Gema Teknologi; Vol 17, No 3 (2013): April 2013 -October 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8937
2020-04-17T20:12:18Z
gema_teknologi:ART
2656-582X
0852-0232
dc
APLIKASI PROGRAMMABLE LOGIC CONTROLLER (PLC) OMRON CP1E NA20 DRA DALAM PROSES PENGATURAN SISTEM KERJA MESIN PEMBUAT PELET IKAN
Dewi, Tiar Kusuma
PSD III Teknik Elektro
Sasmoko, Priyo
PSD III Teknik Elektro
Tiar Kusuma Dewi, Priyo Sasmoko, in paper application of programmable logic controller (PLC) omron CP1E NA20 DRA in control system of fish pellets builders engine explain that better known as PLC or Programmable Logic Controller is an electronic apparatus that works digitally , has a programmable memory , save the commands to perform specific functions such as logic , timing , counting and arithmatik to control different types of machines or processes through modules input / output analog or digital . PLC will run the display module according to the mnemonic code is entered into the PLC via the Programming Console or the CX - Programmer programs . However , here are discussed PLC using the CX - Programmer . OMRON PLC used is CP1E NA20 DRA . PLC works by observing input ( via sensors related ) , then the process and take action as needed , ie turn on or turn off the output ( logic 0 or 1 ) . Users create a program that will then be executed by the PLC in question , so that the tool Fish Pellet Machine Manufacturers Automatic will work as desired .
Keyword : OMRON PLC CP1E NA30 DRA , the CX - Programer
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8937
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/19154
2020-04-17T20:15:55Z
gema_teknologi:ART
"180430 2018 eng "
2656-582X
0852-0232
dc
EKSISTENSI PLTMH CINTA MEKAR DALAM PEMBERDAYAAN MASYARAKAT MELALUI KOPERASI MEKAR SARI DI DESA CINTA MEKAR KECAMATAN SERANG PANJANG KABUPATEN SUBANG PROVINSI JAWA BARAT
Ariyanto, Eko
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Sasmoko, Priyo
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Pamungkas, Zaka Adi
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Potential Water Resources; New and Renewable Energy Power; PLTMH Cinta Mekar; Mekar Sari Cooperative; Community Empowerment;
PLTMH located in CintaMekar Village, SerangPanjang Sub-District, Subang Province, West Java Province, utilizes Ciasem River water, processed so that it has high water fall 17,61 m, water discharge design 1,100 l / s, hydraulic potential of 160 KW, turbine efficiency of 0.73, efficiency of generator 0.89, out put generator 120 KW, loses 4 KW and total electrical energy generated 116 KW. The purpose of development, to help people who were not reached PLN electricity, to empower the community.Empowerment begun from the time of development, where citizens are involved, which then able to become operators. The result of energy from PLTMH is sold to PLN, then the result is reduced for operational costing, maintenance cost, import cost / electricity payment used, depreciation cost of equipment taken from 10% of transactions, divided by two (50% for PT HidropirantiIntiBaktiSadaya, as shareholder) and 50% for Mekar Sari Cooperative, used for community empowerment. Since its operation, people who do not have electricity grid, are connected to electricity. In addition, the proceeds from the sale of electricity to PLN are used to help with the cost of education / scholarship, health, loans for business and cooperative operations. Empowerment implemented or managed Mekar Sari Cooperative. Along with the development of the era, empowerment assistance now being implemented includes: Health Sector in cooperation with Village Midwife, Savings and Loans and Scholarships for Primary School - 10 People and Junior High School - 5 People.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/19154
Gema Teknologi; Vol 19, No 4 (2018): October 2017 - April 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21879
2020-04-17T20:15:05Z
gema_teknologi:ART
"171031 2017 eng "
2656-582X
0852-0232
dc
SIMULASI SISTEM PERINGATAN DINI KETINGGIAN AIR SUNGAI DENGAN MENGGUNAKAN ALARM DAN SMS GATEWAY BERBASIS AT-MEGA 16
Firdaus, Muhammad
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
yuniarto, yuniarto
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Monitoring system; water level; electrode;
Muhammad Firdaus, Yuniarto, in this paper explain that river is one of the important and supporting places for human life, some uses of the river include supporting industrial activities, tourism and much more, besides that many in some river function sites are used as dams for use as an area of electricity generation or just for control water content, but from rivers also natural disasters can occur, which is like a flood caused by overflowing river water The alert system will flood from overflowing rivers until now it cannot work automatically to determine the river's water level. This causes the average local population not to know when the river surface will overflow. In this study a flood detection system was designed that works automatically by knowing the level (level) of the river's water level In designing this tool, the system will be made on the basis of the Atmega 16 microcontroller, where as an input electrodes will be used as detection of water level, and the output will be an alarm with a certain type of sound that adjusts the water level. destination number in the form of notification of the condition of the river water level to be detected.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21879
Gema Teknologi; Vol 19, No 3 (2017): April 2017 - October 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21947
2020-04-17T20:13:58Z
gema_teknologi:ART
"161031 2016 eng "
2656-582X
0852-0232
dc
ALAT UKUR INDUKTANSI DIGITAL BERBASIS ATMEGA 32
Ramdany, Hanna Fury Nur
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Winarno, Heru
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Hanna Fury Nur Ramdany, Heru Winarno in this paper explain that inductors have an important role in the field of electronics. Many values of capacitors and inductors whose values are difficult to translate, namely when capacitors and inductors are of low value and the color of the print is less clear , also considering the human read factor when an analog measuring instrument is used. From these problems, it is designed an inductance measuring instrument (L Meter) whose results can be directly displayed.
The research method used in the manufacture of inductance meter measuring instruments is the literature method and laboratory tests using frequency variables generated or read by the oscillator circuit. The inductance measuring instrument designed in this researc is simple and meticulous measuring instrument that can be read and used by everyone. This digital inductance meter can be used to measure inductance - inductance with a level or a range of measurements between 20μH –100mH.
The lower the inductor value measured, the higher the percentage error. So that the tools designed must be able to work well. The average error ratio of an inductance meter with a standard LCR meter is 6.5%. .
Keywords: Measuring, Inductor, Microcontroller and LCD Display
References
• Mimail,B. (2011) Dasar Teknik Elektro Rangkaian Listrik.Malang UB Press.
• Malvino, A.P. (1979). Prinsip-Prinsip Elektronik Edisi Kedua (terjemahan Hanapi Gunawan). Jakarta:Erlangga.
• Malvino, A.P. (1996). Prinsip-Prinsip Dasar Elektronika Edisi Ketiga (terjemahan Prof. M. Barmawi, Ph.D. , M.O. Tjia, Ph.D., Departemen Fisika, Institut Teknlogi Bandung). Jakarta: Erlangga.
• Bishop, O. (2004). Dasar-Dasar Elektronika (terjemahan Irzam Harmein S.T). Jakarta: Erlangga.
• Yuliana, E. (2006). Rancang Bangun Alat Induktansi dan Kapasitansi Meter. Semarang. Universitas Negeri Semarang.
• Amallia, F. (2009). Rancang Bangun Kapasitansi dan Induktansi Meter Menggunakan Mikrokontroler Atmega8 Dengan Tampilan LCD. Jakarta. Universitas Mercu Buana.
• Frank D, Petrezuella. (2001). Elektronika Industri. Yogyakarta: Andi
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21947
Gema Teknologi; Vol 19, No 1 (2016): April 2016 - October 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/363
2020-04-17T20:06:47Z
gema_teknologi:ART
"101024 2010 eng "
2656-582X
0852-0232
dc
EVALUASI KINERJA BANGUNAN AKIBAT PENGARUH GEMPA RENCANA PADA STRUKTUR GEDUNG 3 LANTAI BERDASAR SNI 03-1726-2003
Christiawan, Ignatius
Ignatius Christiawan, in this paper explain that In effort fulfill requirement the well building infrastructure, safety of building user such as building avalanche damage as result of earthquake is principal priority. Due to user safety to building avalanche as result of earthquake then it was issued the Procedure of Earthquake Endurance Planning SNI 03-1726-2003 that regulates of planning, build or operates a building. Problem emerge at the building which have the old regulation plan, so it was need evaluation based on the new regulation. Evaluation is conducted at the 3 floor laboratory and lecturing building. Research was focused on performance evaluation of structure on existing condition relate at regulation of the Procedure of Concrete Structure Calculation for the SNI 2847-2002, application for earthquake based on SNI-1726-2002. SAP 2000 is used to analyze the pushover to obtain the building ductility value and the reduction factor value (R) from the building. The result of material test was obtained fo’ existing 17 Mpa and fy existing 390 Mpa. The result of structure performance evaluation was obtained the service limit performance and the building unlimited performance fulfilling condition SNI – 1726 – 2002. Keywords: plan earthquake, evaluation, safety.
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/363
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/23100
2020-04-17T20:16:46Z
gema_teknologi:ART
"190430 2019 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN PROTOTIPE SISTEM KENDALI IRON REMOVAL FILTER (IRF) PADA UNIT PENGOLAHAN AIR BERSIH BERBASIS PLC
Karyadi, Kukuh
PT. Badak LNG (Persero)
Suseno, Jatmiko Endro
Program Studi Sarjana Terapan Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro
water treatment plant; iron removal filter; PLC; HMI; OPC Server;
Kukuh Karyadi, Jatmiko Endro Suseno in this paper explain that Water is a necessity of life that is very important for mankind. The availability of clean water has been sought to be fulfilled in various ways. One of them is by making a clean water treatment plant that can process water that is not yet suitable for consumption to be more feasible and ready to be consumed for everyday life. The operation of water treatment plant is still manually operated such as in the Iron Removal Filter (IRF) control system so that the processing is not easy to operate. To facilitate the operation of a clean water treatment unit, a control system based on a Programmable Logic Controller (PLC) is created on the Iron Removal Filter (IRF) processing unit. Control system consisting of PLC, relay circuit, power supply and Human Machine Interface (HMI), works to control the clean water processing unit including controlling the process on the IRF automatically. Also made a prototype of a water treatment plant consisting of an aerator unit, an IRF unit, a storage tank, several pumps and several control valves to be controlled by the control system in operation. The control system uses PLC as a control center because PLC is a controller that is simple, easy to program and very reliable as already widely used in the industrial world. The PLC brand used is Omron because it is cheap, reliable and has software named CX-Programmer which is easy in programming. The control system uses laptop computer as an HMI in the operation. HMI uses VTScada software and is connected to a PLC using OPC CX-Server software. The control system that is made can control the clean water processing unit in the form of a prototype. Operation on HMI is so easy and has a very attractive appearance. So it is highly recommended to be used in the actual clean water treatment unit
Vocational School Diponegoro University
2019-05-13 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/23100
Gema Teknologi; Vol 20, No 2 (2019): October 2018 - April 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4711
2020-04-17T20:08:32Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PERKUATAN (STRENGTHENING) STRUKTUR KOLOM DENGAN METODA PENAMBAHAN TULANGAN
Christiawan, Ignatius
Program Studi Diploma III Teknik Sipil
Fakultas Teknik Universitas Diponegoro
Ignatius Chistiawan, in this paper explain that in the management of buildings, frequent damage to buildings due to the increasing load beyond the load plan. Safety of building users to the dangers of building collapse is the main priority.
The addition of load beyond the load on the building plans because of changes in building functions often lead to the collapse of the building. The addition of load beyond the load on the building plans because of changes in building functions often lead to the collapse of buildings. Structural strength evaluation to the condition of existing building is required and when it is necessary to give reinforcement to the plate, beams and columns before adding a new load. additional reinforcement is one way of strengthening the column.
Research was focused on performance evaluation of structure on existing condition relate at regulation of the Procedure of Concrete Structure Calculation for the SNI 2847-2002.
From some previous research, the basics of analysis and design of flexible and practical calculation examples retrofitting columns with the addition of reinforcement can be concluded that this method is easy and practically implemented and can improve the flexural strength of reinforced concrete columns.
Keywords : load addition, evaluation, strength, safety.
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4711
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/32587
2020-11-12T22:08:03Z
gema_teknologi:ART
"201030 2020 eng "
2656-582X
0852-0232
dc
ANALISA PERFORMA KAPAL KM. CIREMAI DENGAN MODIFIKASI PENAMBAHAN PROPELLER HUB CAPS FIN DENGAN METODE EKSPERIMEN
Suharto, Suharto
Prodi D3 Teknologi Perancangan Konstruksi Perkapalan, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro http://www.vokasi.undip.ac.id
Sulaiman, Sulaiman
Prodi D3 Teknologi Perancangan Konstruksi Perkapalan, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro http://www.vokasi.undip.ac.id
Propeller Hub Cap Fins; Propeller; Ship performance; Experimental methods.
The various ship propulsion models there are several considerations in the selection to be applied to the ship, such considerations are required in the planning of the ship's propulsion. With the addition of propeller hub caps fin is expected to deliver a flow model that supports the performance of propulsion systems on ship. The purpose to analyzes the best performance of the propeller shaft engine, representing a comparison of fuel consumption efficiency, as well as ship speed based on the addition of propeller hub caps fin on MV. CEREMAI. Method used was conducted experimentally to determine the performance of the ship's engines before and after using energo pro fin (propeller hub caps fin) with sea trial. Result shows 2% reduction in fuel consumption on the portside main engine and 3% starboard main engine. As well as enabling increased operational speed of KM ships. CIREMAI at 12% with the same rpm round. So selection of ship propeller types affects the performance of enegro profin (propeller hub caps fin).
Vocational School Diponegoro University
2020-11-11 15:02:23
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/32587
Gema Teknologi; Vol 21, No 1 (2020): April 2020 - October 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8811
2020-04-17T20:09:57Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
DUMMY CB SEBAGAI ALAT SIMULATOR KUBIKEL UNTUK PEMELIHARAAN PREVENTIF DAN KOREKTIF GUNA MENGURANGI FREKUENSI PADAM PENYULANG 20 KV (APLIKASI PADA SISTEM SCADA 20 KV PT.PLN (PERSERO) APD JATENG & DIY)
Primanto, Meira Dwi
PSD III Teknik Elektro
Sasmoko, Priyo
PSD III Teknik Elektro
Meira Dwi Primanto, Priyo Sasmoko, in paper dummy CB as cubicle simulator for preventive and corrective maintenance to reduce off frequency 20 KV feeders (20 KV scada system at APD Central Java and Yogyakarta) explain that in 2013, the APD PT.PLN Central Java and Yogyakarta are conducting integration to SCADA at 20 KV feeders in distribution substation. For the next stage has been installed SCADA maintenance should be done periodically. Maintenance can be planned or due to interference with the SCADA system. Maintenance is usually done by the team must perform SCADA Distribution feeder outages and transfer of the load. In the installation of equipment, SCADA team should get a working permit to shut down the feeder, and to transfer the load to another feeder, so that the work has to get permission. SCADA systems are already installed requires maintenance to keep the system reliability. When maintenance SCADA, feeders should be extinguished, whereas for medium voltage customers such as factories, hospitals, and airports should always be channeled electrical energy. Feeder outages and load Delegation KWH lost causes. To the authors attempt to provide solutions that can overcome the missing KWH with a tool innovations made. The author makes a tool such as a dummy circuit breaker simulator 20 KV cubicles. This tool serves Especially when employees perform maintenance or investigation SCADA Disorders, which aims for 20 KV feeders should not be extinguished when performing preventive and corrective maintenance. So the number of frequency of feeder outages can be reduced.
Keywords : Dummy Circuit Breaker, 20 KV PMT, SCADA maintenance.
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8811
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8921
2020-04-17T20:11:10Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PROTOTIPE PENGANGKAT SAMPAH OTOMATIS PADA SALURAN PINTU AIR BERBASIS MIKROKONTROLER ATMEGA 8535
Kurniawan, Abdillah
PSD III Teknik Elektro
Winarno, Heru
PSD III Teknik Elektro
Abdillah Kurniawan, Heru Winarno, in paper prototype of waste lifting automatic on channel floodgate based on microcontroller ATMega 8535 explain that waste generated by the community from day to day more and more. Waste problems increasingly complex society is not discipline, in the sense that many people who throw garbage out of place, including dumped in the river. It can disrupt the flow of water. So in this thesis was designed prototype automatic garbage lifting the sluice channel driven by a 12 volt DC motor, used as a carrier conveyor trash removal results, this prototype design using microcontroller 8535 as the system controller. Minimum System 8535 microcontroller itself is as controller input, output, dc motor driver, rang the buzzer in case of opening the floodgates, and lcd M1632 as a viewer status. Trash removal tool aims to reduce the accumulation of garbage in the canal sluice. With these tools can mitigate human performance.
Keywords: Microcontroller 8535, Lcd M1632, 12 Volt DC Motor, Buzzer
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8921
Gema Teknologi; Vol 17, No 2 (2013): October 2012 - April 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8932
2020-04-17T20:11:56Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PERENCANAAN FILTER PASIF UNTUK MENINGKATKAN KUALITAS DAYA LISTRIK DI KAMPUS DIPLOMA III FAKULTAS TEKNIK UNDIP
Subari, Arkhan
PSD III Teknik Elektro
Manan, Saiful
PSD III Teknik Elektro
Arkhan Subari, Saiful Manan, in this paper explain that most electronic equipment is non-linear load. Likewise with the equipment in campus buildings Diploma III Faculty of Engineering. Non-linear load is a load that has a voltage waveform supplied from non sinusiodal although sinusoidal voltage. Non-sinusoidal wave causes the shape of the voltage becomes distorted or defects that result in decreased quality of power. The defect wave called harmonics. To dampen harmonics on non-linear load can be used filter. With the addition of a filter on the power system, then the waves of unwanted harmonics can be suppressed as small as possible. In addition, harmonic filter at the fundamental frequency can compensate for reactive power and is used to improve the power factor of the system. From the measurement results in the Diploma Program Campus FT Undip found that the influence of harmonic waves big enough. THDv reached 32.13% while the THDi amounted to 7.85%. It affects so cos phi cos phi measured just 0.72. After the installation of a passive filter, the value THDv and THDi be good lebik ie 1.61% and 0.39% to reach 0.94 cos phi measured.
Key word: non-linear loads, non-sinusoidal waveform, harmonics, power factor, filter LC
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8932
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/19149
2020-04-17T20:15:29Z
gema_teknologi:ART
"180430 2018 eng "
2656-582X
0852-0232
dc
APLIKASI METODA CRITICAL PATH METHOD (CPM) DALAM PENJADWALAN KEGIATAN PEMBANGUNAN PERUMAHAN
Sutanto, Sutanto
Teknik Sipil, Sekolah Vokasi, Universitas Diponegoro
housing; scheduling; CPM;
The development of housing development in Indonesia is now showing a very rapid progress in line with the rate of population growth and the increase in income per capita community, so that housing demand is getting bigger. For that much needed planning and scheduling activities of a good housing development projects in accordance with the progress of science and technology in order to have added value to the implementation of the housing development. The Critical Path Method (CPM) application research in guarding housing development activities and the impact on technical constraints in the field is one solution. Based on the results of data processing shows that the use of scheduling activities of housing development projects with Critical Path Method method has resulted in more added value.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/19149
Gema Teknologi; Vol 19, No 4 (2018): October 2017 - April 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21864
2020-04-17T20:14:33Z
gema_teknologi:ART
"170430 2017 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN ALAT PENGATURAN ARAH PUTAR MOTOR DC POWER WINDOWS BERBASIS PLC PANASONIC MENGGUNAKAN HUMAN MACHINE INTERFACE (HMI)
Alfitri, Tafki Aunika Fariz
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Panasonic Programmable Logic Controller (PLC); Relay; Human Machine Interface (HMI);
Tafki Aunika Fariz Alfitri, Iman Setiono, in this paper explain that at this time human life has become more advanced especially in the field of science and technology, all people compete to create technology that is useful and easy for humans. At present the equipment in general has used a remote monitoring and operation system. This system usually uses a microcontroller or PLC as a control. In an effort to facilitate human work, in this case I tried to make a design setting the direction of rotation of the DC power windows. This DC power windows motor is usually used in the car to move the windshield up and down. This Windows power DC motor uses a power supply of 12 volt DC and the output is between 0-5 Volt. This design uses Panasonic PLC as its main control. By using the relay as a reverse rotation setting and forward DC power windows, the motor will automatically move in reverse and forward. The input of a 24 Volt DC panasonic PLC originating from the adapter. The design of this tool can later be applied to a glass in the car by using the Panasonic PLC as its control and other component components needed in the design of the rotary direction arrangement. In the operation by way of toch screen using a human machine interface as a contruction tool to drive the DC power window to spin in reverse or forward.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21864
Gema Teknologi; Vol 19, No 2 (2017): October 2016 - April 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21930
2020-04-17T20:13:04Z
gema_teknologi:ART
"151031 2015 eng "
2656-582X
0852-0232
dc
SISTEM PAKAR KESEHATAN PADA IBU HAMIL BERBASIS MOBILE WEBSITE
Setiyani, Umi
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Subari, Arkhan
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Umi Setiyani, Arkhan Subari, in this paper explain that the maternal mortality rate in Indonesia is still high, every 1 hour, 2 maternal death. Lack of information about the health of pregnant women, to be one cause. By utilizing the WAP ( Wireless Application Protocol ) and expert systems can be made to maternal health expert system -based mobile website. Maternal health expert system is able to diagnose 15 to 61 illnesses symptoms often suffered by pregnant women . Diagnosis of the disease is designed using forward chaining inference engine with the aid of decision tables and decision trees . In addition the system is also able to calculate the daily calories needed by pregnant women using cooper . So with this system can help pregnant mothers to know their health condition .
Keywords : expert system , Wireless Application Protocol , the health of pregnant women.
References
• Natalia, Deasy Astrid. 2006. Pembangunan Sistem Pakar pada Perangkat Mobile dengan WML dan PHP untuk Penyakit Paru pada Anak. Surabaya
• Broto, Adi Sadewo.2010. Perancangan dan Impelentasi Sistem Pakar untuk Analisa Penyakit Dalam. Semarang : Unversitas Diponegoro.
• Giarratano, J.C & Rilley G. 1994. Expert Systems: Principles and Programming, 2sd edition. USA : PWS Publishing Co.
• Kusrini. 2008. Aplikasi Sistem Pakar. Yogyakarta : Penerbit Andi.
• Martin dan Oxman dalam Kusrini. 2006. Aplikasi Sistem Pakar. Yogyakarta : Penerbit Andi.
• Turban, E. 1995. Decision Support System dan Expert System. USA :Prentice Hall International Inc
• Mulyono, Djoko. 2008. Pembangunan Sistem Pakar pada Perangkat Mobile dengan WML dan PHP untuk Menemukan Penyebab Kerusakan Mesin Isuzu Panther. Semarang : Unaki
• Surono, dkk.2009. Bahasa Indonesia Untuk Perguruan Tinggi. Semarang: Fasindo Press
• Mc Leod dalam Turban,E. 1995. Decision Support System dan Expert System. USA : Prentice Hall International Inc.
• Turban dalam Mulyono, Djoko. 2008. Pembangunan Sistem Pakar pada Perangkat Mobile dengan WML dan PHP untuk Menemukan Penyebab Kerusakan Mesin Isuzu Panther. Semarang : Unaki
• Wilson dalam Kusrini. 2006. Aplikasi Sistem Pakar. Yogyakarta : Penerbit Andi.
• Giarratano dan Rilley dalam Kusrini. 2006. Aplikasi Sistem Pakar. Yogyakarta : Penerbit Andi.
• Solichin,Achmad. 2013. Pemrograman Web dengan PHP dan MySQL. Jakarta: UBL
• Juman, Kundang K. 2009. Komunikasi Multimedia.Jakarta
• Nokia. 2002. XHTML Guidlines. Finlandia : Nokia Corporation.
• Priyandari. 2013. Tutorial Database II, Mengenal RDBMS MySQL, http://blog.priyandari.net/2013/tutorial-database-ii-mengenal-rdbms-mysql-1/, diiakses tanggal 15 Agustus 2013.
• Anonim. 2013. XHTML MP (eXtensible HyperText Markup Language Mobile Profile). http://www.developesrhome.com/, diakses tanggal 4 Juni 2013
• Dinkes Jateng. 2011. Profil Kesehatan Jateng 2011. Semarang : Dinkes Jateng
• Setiawan (Ed). 1998. Ilmu Kebidanan, Penyakit Kandungan, dan Keluarga Berencana. Finlandia: Penerbit Buku Kedokteran EGC
• Wiknjosastro, Hanifa. 2005. Ilmu Kandungan. Jakarta : Yayasan Bina Pustaka Sarwono Prawirohardjo.
• Saifuddin, Abdul Bari. 2006. Buku Acuan Nasional Pelayanan Kesehatan Maternal dan Neonatal. Jakarta : Yayasan Bina Pustaka Sarwono Prawirohardjo.
• Poedyasmoro, SKM. 2005. Buku Praktisi Ahli Gizi (Buku Kuliah Politeknik Kesehatan Malang). Malang
• Wahyudi, doni. 2004. Data Mining Email. Bandung
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21930
Gema Teknologi; Vol 18, No 3 (2015): April 2015 - October 2015
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/228
2020-04-17T20:06:21Z
gema_teknologi:ART
2656-582X
0852-0232
dc
RECYCLING OF PINEAPPLE WASTE USING LACTOBACILLUS DELBROECKII TO LACTIC ACID
Moch Busairi, Abdullah
Abdullah, in paper recycling of pineapple waste using lactobacillus delbroeckii to lactic acid, explain that The pineapple wastes juice contains mainly sucrose, glucose, fructose and other nutrients. It therefore can potentially be used as carbon source for organic acid fermentation. Recently, lactic acid has been considered to be an important raw material for production of biodegradable lactate polymer. The experiments were carried out in shake flask fermentation using Lactobacillus delbrueckii. Effect of some parameters such as temperature, initial pH, initial substrate concentration, yeast extract concentration and fermentation time to the yield have been studied. The highest yield was 85.65 % achieved at 40 o C, pH 6.00, 52.5 g/l sugar concentration with 5 g/l yeast extract. There was no significant increasing in lactic acid production was observed if supplementation of yeast extract above 10 %..
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/228
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/22641
2020-04-17T20:16:35Z
gema_teknologi:ART
"190430 2019 eng "
2656-582X
0852-0232
dc
DESAIN SISTEM KENDALI UMPAN BALIK STATE PADA KASUS KONTINYU UNTUK MEJA KERJA CNC
Mangkusasmito, Fakhruddin
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Nugroho, Tsani Hendro
BTMEPPO-Badan Pengkajian dan Penerapan Teknologi
Computer Numerical Control (CNC); work-table motion control; state feedback control; contionous; MATLAB;
Fakhruddin Mangkusasmito, Tsani Hendro Nugroho in this paper explain that One of the important control system in the manufacturing industry is the position control. Mainly in the Computer Numerical Control (CNC) machine, work-table motion control system is used to regulate work-table movements when the machine process a workpieces on it. On standard machines, work-table movements are two axes (X-Y), which is driven by a motor and lead-screw. The discussion in this research only focus on one axis assuming that the systems on both axes are the same and independent. In this research, MATLAB is used to describe the behaviour of the system and also to design appropriate control system in continuos system using state feedback linear controller such as pole placement , tracking system, full order compensator and reduced order compensator. The goal is to obtain a fast response with a rapid rise time and settling time to a step command, while not exceeding an overshoot of 5%. The specification are than a percent overshoot equal to1%, 0,05s settling time and 0,03s rise time. The performance of each control methods are simulated and analyzed to decide the best suit control method for the systems with such criteria. And the result verify that using tracking system controller method achieve such specification with 0% overshoot, 0,04s settling time and 0,028s rise time.
Vocational School Diponegoro University
2019-05-13 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/22641
Gema Teknologi; Vol 20, No 2 (2019): October 2018 - April 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4706
2020-04-17T20:08:02Z
gema_teknologi:ART
2656-582X
0852-0232
dc
INOVASI PEMBUATAN ABON IKAN SEBAGAI SALAH SATU TEKNOLOGI PENGAWETAN IKAN
Kusumayanti, Heny
Program Diploma III Teknik Kimia Fakultas Teknik Undip
Astuti, Widi
Fakultas Teknik Universitas Negeri Semarang
Broto, RTD. Wisnu
Program Diploma III Teknik Kimia Fakultas Teknik Undip
Heny Kusumayanti, Widi Astuti, RTD. Wisnu Broto, in this paper explain that fish is one of the food-stuff which liked many and consumed by societies besides as commodity of export. In general fish quickly experience of the process of obsolence if compared to other food-stuff is so that required by technology processing of fish to length then energy keep him, one of them is processing of fish become shredded fish. Region sub-district of Mangunharjo have big potency in fishery area, by halves societies work as farmer of fishpond. With existence of training to society about expected by society have adequate knowledge so that can exploit the area potency of to improve his life level. Activity method which used in this devotion is method deliver a lecture, method’s practice of concerning way making of shredded fish, and question and answer method. The result show that very enthusiastic society to making process of shredded fish. Require to be done by creativity and innovation in course of processing of shredded fish so that yielded product can certifiable and better.
Keyword : Fish, Processing of fish, Shredded fish.
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4706
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/29301
2020-05-29T15:02:39Z
gema_teknologi:ART
"200430 2020 eng "
2656-582X
0852-0232
dc
UJI EFIKASI FORMULASI RODENTISIDA CAIR DENGAN BAHAN AKTIF PERMENTRIN DAN MALATHION PADA TIKUS SAWAH, TIKUS RUMAH DAN TIKUS POHON DALAM MENCEGAH PENYAKIT LEPTOSPIROSIS
Supriyo, Edy
Program Studi Sarjana Terapan Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.co.id/citations?user=GZLRyrgAAAAJ&hl=id
Pujihastuti, Isti
Program Studi Sarjana Terapan Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
Broto, RTD Wisnu
Program Studi Sarjana Terapan Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
Arifan, Fahmi
Program Studi Sarjana Terapan Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
leptospirosis; field mice; house mice; tree mice
Mice are the main reservoir in transmitting leptospirosis, which is an infectious zoonotic disease caused by pathogenic leptospira bacteria, so it needs to be controlled effectively. Mice control has been using traps or rodenticides. One of the pesticides available is permethrin and malathion, which has been used as an insecticide. The purpose of this study was to determine the effectiveness of insecticide formulas as rodenticides in killing field mice, house mice, and tree mice. In the research of liquid rodenticide formula, the concentration is 0.025; 0.050 and 0.075% of the active ingredients were tested for efficacy against mice. Data analysis in the form of descriptive. The results showed that the absence of mice that died from these three types of mice, which showed a dose of 0.075%, was too small for mice so that they only experienced seizures. So that further testing is needed to make the killing power more effective on mice.
Vocational School Diponegoro University
2020-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/29301
Gema Teknologi; Vol 20, No 4 (2020): October 2019 - April 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8806
2020-04-17T20:09:37Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
OPTIMALISASI PENGUKURAN ARUS OLEH CURRENT TRANSFORMER UNTUK MEMINIMALISIR SUSUT ENERGI PADA PABRIK BAJA PT. INTI GENERAL YAJA STEEL DAERAH SEMARANG BARAT
Amalia, Devita
PSD III Teknik Elektro
Ariyanto, Eko
PSD III Teknik Elektro
kWhmeter adalah suatu alat ukur energi listrik yang mengukur secara langsung hasil kali tegangan, arus, faktor kerja, dan waktu yang bekerja selama jangka waktu tertentu. Pengukuran energi yang dominan adalah pengukuran arus, di mana arus yang diukur melebihi arus yang terdapat di kWh meter. Untuk itu dibutuhkan suatu peralatan instrumen yang dapat menurunkan arus yaitu trafo arus.
Susut distribusi pada sistem kelistrikan dapat terjadi pada alat pengukur dan pembatas (APP) yang dipergunakan dalam transaksi tenaga listrik dengan pelanggan. Susut yang terjadi pada APP ditentukan oleh akurasi APP dan akurasi pembacaan atau pengambilan data hasil pengukuran.
Untuk menghindari atau mengurangi susut tersebut pemilihan trafo arus yang tepat sangat dibutuhkan seperti mengamati seberapa besar ketelitian trafo arus dalam pengukuran. Kelas ketelitian trafo arus, burden, kesalahan sudut, dan juga arus nominal dari sisi primer trafo arus harus diperhatikan. Jika pemilihan tidak sesuai, maka akan memungkinkan terjadinya susut.
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8806
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/37297
2022-06-21T07:53:00Z
gema_teknologi:ART
"210430 2021 eng "
2656-582X
0852-0232
dc
TRANSESTERIFIKASI MINYAK KELAPA MENJADI BIODIESEL DENGAN KATALIS CAO DAN PENERAPAN BIODIESEL (B40) PADA ALAT FOGGING
Bethan, Maria Stefani
Program Studi Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.co.id/citations?user=GZLRyrgAAAAJ&hl=id
Supriyo, Edy
Program Studi Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
biodisel; transesterification; coconut oil
Biodiesel is a renewable fuel from a transesterification reaction in which triglycerides are converted into FAME with alcohol. Previous research proved that coconut oil can be used as biodiesel. This study aimed to determine the effect of temperature (40-60oC), catalyst concentration of CaO 2-5%w/w) and methanol (20-40%w/w) on the yield of biodiesel produced. The yield were then compared with the biodiesel specification from Pertamina, i.e. density, viscosity, acid number, flash point and cetane number. The result of present work showed that the transesterification reaction between coconut oil and methanol with CaO catalyst have got a reaction conversion of 75% at 60oC, for 2 hours. For producing biodisel, the optimum conditions were achieved when using methanol 20% w/w and a concentration of CaO 2% w/w. The specification biodiesel were as followed: density 836 kg/m3, viscosity 3.09 mm2/sec, acid number 0.37 mgKOH/gr, flash point 62oC, and Cetane value 50.5. In the application, biodiesel (B40) from coconut oil on a fogging machine with a noise of 81.5 dB.
Vocational School Diponegoro University
2021-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/37297
Gema Teknologi; Vol 21, No 2 (2021): October 2020 - April 2021
eng
Copyright (c) 2021 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8916
2020-04-17T20:10:44Z
gema_teknologi:ART
"121001 2012 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN APLIKASI PENGUKURAN TINGGI BADAN, BERAT BADAN, SUHU TUBUH, DAN TEKANAN DARAH BERBASIS MIKTROKONTROLER ATMEGA16
Dewi, Ratih Kusuma
PSD III Teknik Elektro
Subari, Arkhan
PSD III Teknik Elektro
Ratih Kusuma Dewi, Arkhan Subari, in paper design and application of measurement stature , body weight , body temperature , and pressure based miktrokontroler atmega16 explain that now almost all uses of automation , both in the world of health . Equipment needed is the automation of the measurement tool capable of measuring several variables simply using a tool . The tool consists of ultrasonic sensors as a means of height measurement , the sensor strain guage as a means of weight measurement , LM35 temperature sensor as a means mengkuran body temperature , as well as a combination of MPX5100DP pressure sensors , motor driver , relay driver , as well as a mini compressor pressure gauge blood . The method used in the manufacture and testing of the tool by comparing the output of this tool with measuring devices in the market . The measurement results will be issued in the form of LCD , Voice Processor , and Database . Height measurement tool using these tools has a percentage error of 1.52 % , while for 2.314 % of body weight , body temperature by 1.62% , to pressure systole of 1.41 % , and for the pressure dystole of 0.858 % .
Keywords : Ultrasonic Sensor, Strain Guage Sensor, Sensor LM35, MPX 5100DP, Microcontroller ATMega16.
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8916
Gema Teknologi; Vol 17, No 1 (2012): April 2012 - October 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8977
2020-04-17T20:12:44Z
gema_teknologi:ART
"150401 2015 eng "
2656-582X
0852-0232
dc
OPTIMASI PELAKSANAAN PENERTIBAN PEMAKAIAN TENAGA LISTRIK (P2TL) SEBAGAI UPAYA PENINGKATAN SAVING KWH DAN PENEKANAN SUSUT NON TEKNIS DI PT. PLN (PERSERO) RAYON SEMARANG SELATAN
Novena Putri, Irene Ega
PSD III Teknik Elektro
Subari, Arkhan
PSD III Teknik Elektro
Irene Ega Novena Putri, Arkhan Subari, in this paper explain that this study will describe the existing condition P2TL implementation in Rayon South Semarang, examine the root of the problem of lack of optimal implementation of P2TL, and describes efforts to optimizing the implementation in Rayon P2TL South Semarang. The method used is a combination of quantitative and qualitative. The approach used to establish the conditions of implementation P2TL is through observation by setting a good standard P2TL, examining implementation procedures and examined the results of the implementation P2TL P2TL in January-March and discussed the obstacles in its implementation. The approach used to discuss in detail P2TL performance in January-March was through discussion violations committed customers, the amount of saving kWh for three months, the effect of saving kWh in the percentage of shrinkage, and effort optimizing the performance of P2TL. Results of this research note that saving kWh obtained in January-March amounted to 48 599 kWh, or approximately 13% of the targeted savings through the implementation P2TL kWh, thus concluded that the performance P2TL not optimal. Effect of kWh saved is able to suppress shrinkage in January by 0.16% and in March by 0.5%. Efforts should be made in order to optimize the implementation of technically P2TL is through Early Detection of Violations. Efforts should be made in order to optimize the implementation of the non technical P2TL is through targeting of saving kWh monthly, fixing TO Rayon, a sweeping legalization customers, regeneration P2TL implementation team, and socialization prepaid electricity.
Keywords: P2TL, shrinkage, saving kWh, TO.
Vocational School Diponegoro University
2015-08-21 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8977
Gema Teknologi; Vol 18, No 2 (2015): October 2014 - April 2015
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21079
2020-04-17T20:16:16Z
gema_teknologi:ART
"181116 2018 eng "
2656-582X
0852-0232
dc
PELATIHAN DAN PRAKTEK PEMBUATAN SABUN CUCI TANGAN CAIR DI PKK TEMBALANG PESONA ASRI
Kusumayanti, Heny
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Paramita, Vita
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Wahyunimgsih, Wahyunimgsih
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Amalia, Rizka
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Siregar, Vynda Dindasari
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
Pudiastuningtyas, Nurul
Teknik Kimia, Sekolah Vokasi, Universitas Diponegoro
training and practice; liquid hand washing soap; Tembalang Pesona Asri;
Heny Kusumayanti, Vita Paramita, Wahyunimgsih, RizkaAmalia, Vynda Dindasari Siregar, Nurul Pudiastuningtyas, in this paper explain that soap is used as a cleaning agent. Hand sanitizer is a hand sanitizer which makes it easy and can be carried out by PKK mothers and the community. The purpose of this liquid handwashing soap training and practice is to provide knowledge and appropriate technology to the PKK mothers in Tembalang Pesona Asri RT I RW IV Kramas Semarang, in addition to making their own liquid handwashing for self consumption can also be sold so can increase income. The result of this activity is liquid hand washing soap which is red, has a fragrant odor and when used does not cause roughness in the hand.
Vocational School Diponegoro University
2018-11-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21079
Gema Teknologi; Vol 20, No 1 (2018): April 2018 - October 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21909
2020-04-17T20:13:33Z
gema_teknologi:ART
"160430 2016 eng "
2656-582X
0852-0232
dc
POWER SUPPLY INVERTER DC-DC SEBAGAI SUPPLY AUDIO AMPLIFIER
Wardani, Ilham Setiya
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Manan, Saiful
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Ilham Setiya Wardani, Saiful Manan in this paper explain that Utilization of power electronics components in the process of conversion of electrical energy has been growing from year to year. for controlling power from one form to another is very important and the characteristics of the equipment of power electronics has allowed it. DC-DC converters can also be called a wave DC inverter capable of producing symmetrical widely used and applied in industry and everyday life.In the inverter power supply are made using half-bridge converter topology. Half-bridge converter topology has several advantages that are easy to create and output a lot easier in the controlling. The process of switching at the half bridge converter using mosfet IRFZ44N and executed using ICTL494.In the design of the tool, using the supply is 12 Volt DC that directly goes to IC TL494 and frequency output that is generated directly toward the driver mosfet with the type BC327 used to mesaklarkan mosfet by means of on / off alternately to supply the power transformer intiferit to raise the voltage to 26 volt AC that will be rectified by using fast diode recofery MUR1560 to rectify the AC into DC voltage with the output voltage of +/- 26 volts DC.
Keywords: power supply, inverter, TL494
References
• Barkhordarian, V. Power MOSFET Basics. International Rectifier: California. E-book :www.aosmd.com. Didownload pada april 2016. Pukul 21.15 WIB.
• Hermawan, H. Rancang Bangun Sistem Kendali High Frequency Induction Heating. Skripsi S1 Teknik Elektro. Jakarta: Universitas Indonesia.
• Malvino . 1995. Prinsip-prinsip Elektronika. Jakarta : Erlangga.
• Maruitula, Edison. 2011. Rancang Bangun Flyaback Regulator Untuk Mencatu Sistem Pensaklaran IGBT pada Invereter. Skripsi S1 Teknik Elektro .Depok : Unversitas Indonesia.
• Muis, Saludin. 2013. Perancangan Teori Dan Praktis Power Supply Jenis Switch Mode. Yogyakarta : Graha Ilmu.
• Rasyid, Muhammad H. 1999. Elektronika Daya. Jakarta : PT Prenhallindo.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21909
Gema Teknologi; Vol 18, No 4 (2016): October 2015 - April 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/22033
2020-04-17T20:13:24Z
gema_teknologi:ART
"151031 2015 eng "
2656-582X
0852-0232
dc
WATTMETER DIGITAL DENGAN MIKROKONTROLER DAN ARDUINO UNO 2
Yulian, Eki
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Sasmoko, Priyo
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Eki Yulian, Arkhan Subari in this paper explain that Power consumption in boarding houses still can not be monitored , so that power usage bill payments based solely on electrical equipment used in the room . This would be detrimental to the owner of the boarding when the power consumption is too large . But tenants boarding can also be harmed if rarely use electricity must still pay the electric bill to the owner of the boarding.Thus making the tool use of electricity for the purposes of calculating a dorm room at the end of the project , expected to assist in completing the problem. In this tool using optocoupler sensor mounted on a disc kwh meter analog and microcontroller will process the data readings from sensors optocoupler . The output of this tool will appear on an LCD (liquid circuit display) . Where is the data to be displayed is the amount of power usage and costs to be paid . In addition , the tool uses the SMS facility for monitoring power use. Thus the cost paid by the tenant to the boarding room owner would be more in line with the use of electricity in use by tenants boarding.
Keywords :optocoupler sensor, microcontroller , SMS
DAFTAR PUSTAKA
• Andrianto, Heri. 2008. Pemrograman Mikrokontroler AVR ATMEGA 16 Menggunakan Bahasa C (CodeVisionAVR). Informatika: Bandung
• Bejo, Agus. 2008. C & AVR. Graha Ilmu: Yogyakarta
• Fidzon, Adil. 2011. Miniatur Sistem Parkir Mobil Otomatis Berbasis Mikrokontroler ATmega8535. Undip : Semarang
• Hardika, Doni. 2012. Pembuatan Aplikasi Mikrokontroler ATmega8535 Dalam Otomasi Alat Pencacah Permen Skala Home Industri. Undip : Semarang
• Frank D, Peetruzella. 1996. Elektronika Industri. Andi : Yogyakarta
• Malvino, A.P. 1996. Prinsip-prinsip Elektronika (terjemahan Hanapi Gunawan). Erlangga: Jakarta
• M.C, Sharma. 1993. Praktikal Music dan Sound Circuit. Halaman 123 : New Delhi
• Pratama, LiusWeny. 2009. Sistem Absensi Otomatis Pengunjung Perpustakaan Dengan Menggunakan Radio Frequency Identification. Laporan Tugas Akhir Politeknik Negeri Sriwijaya : Palembang
• Sudjadi. 2005. Teori dan Aplikasi Microcontroller. Graha Ilmu : Yogyakarta
• Sumanto, MA. 1984. Mesin Arus Searah. Andi Offset : Yogyakarta
• Turbian, K. 1973. A Manual for Writers of Term Papers, Theses and Dissertations. 4th. Ed. The University of Chicago Press. Chicago.
• Wardana, E.K. 2013. Pintu Pengaman Untuk Ruang Penyimpanan Dokumen Menggunakan RFID (Radio Frequency Identification) Berbasis Mikrokontroler Atmega16. Undip:Semarang
• Wardani, dkk. 2008. Teknik Menulis Karya Ilmiah. Universitas Terbuka : Jakarta
• Wardhana, Lingga. 2006. Mikrokontroler AVR seri ATMEGA Simulasi, Hardware, dan Aplikasi. Andi : Yogyakarta
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/22033
Gema Teknologi; Vol 18, No 3 (2015): April 2015 - October 2015
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/1627
2020-04-17T20:07:15Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PERENCANAAN KONSTRUKSI BETON SLIPWAY - 150 LWT
Dharma, Budhi
Program Studi Diploma III Teknik Sipil
Fakultas Teknik Universitas Diponegoro
Budhi Dharma, in paper Construction Planning of Slipway - 150 LWT Concrete explain that in shipyard planning major facility types shipyard slipway suitable transverse system was built in the open or closed.To ship with 150 tons LWT according to the register BKI got main dimension vessels = 34 meters LOA,30 meters LP, 6 meters B, the ship draft T = 2,2 meters, and empty vessel draft Tk = 1,18 meters and block coefficient = 0,68.
Of the main dimension of the vessel were then long slipway, heavy lorries and heavy lorries transfer launchers after the total weight is obtained the dimensions of the placement of concrete beam rail and lorry.
Keyword : Slip way and structure concrete
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/1627
Gema Teknologi; Vol 16, No 2 (2011): October 2010 - April 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/25918
2020-11-05T09:35:25Z
gema_teknologi:ART
"191031 2019 eng "
2656-582X
0852-0232
dc
SIMULASI PELIMPAHAN BEBAN PMT OUTGOING PWI 06 SAAT TERJADI OVERLOAD SHEDDING PADA TRAFO INCOMING 03 GARDU INDUK PURWODADI DENGAN MONITORING VT SCADA BERBASIS ARDUINO MEGA 2560
Rizkifadhla, Reza
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Winarno, Heru
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=0dsIvPMAAAAJ
reliability; overload shedding; maneuver
Reza Rizkifadhla, Heru Winarno, in this article explains that overload shedding in incoming transformer occurs due to an increase in load current that exceeds the capacity of the transformer. If overload shedding is not handled, it will cause damage to the transformer, and even cause incoming trip feeders and a very wide blackout effect. Relay overload shedding mounted on incoming feeders works to anticipate overload shedding by deliberately releasing outgoing feeders gradually to reduce the load. This study aims to provide a simulation of the conditions of incoming feeders during normal times, during overload shedding and handling of outgoing feeders deliberately released by carrying out load maneuvers to other feeders with different incoming transformers. Maneuvers are carried out to maintain the reliability of the continuity of electricity distribution. In this study one simulation tool was designed. The design of this tool uses a relay and Arduino Mega 2560 as a control center. Arduino Mega 2560 reads the current using the ZMCT 103C sensor. The simulation is based on the overload shedding event that has occurred in Purwodadi Substation. As for controlling switching equipment and monitoring current and voltage is done using HMI with VT Scada software. In the experiment, 3 incoming normal currents were 2.2 A with a load of 5 12 VAC 5W lamps. Simulated maneuvering error, the load on incoming 3 increased to 2.60 A. This situation is considered to have reached the condition of overload shedding, relay PMT C trip to reduce the load. Incoming 3 returns back to normal, namely 1.68 A. Loads on PMT C that are extinguished are maneuvered to PMT E or PMT F which have different incoming.
Vocational School Diponegoro University
2019-10-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/25918
Gema Teknologi; Vol 20, No 3 (2019): April 2019 - October 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4784
2020-04-17T20:09:11Z
gema_teknologi:ART
2656-582X
0852-0232
dc
ANALISA KARAKTERISTIK BIODIESEL NYAMPLUNG
Darmanto, Seno
Program Diploma III Teknik Mesin Fakultas Teknik Universitas Diponegoro
Sediono, Windu
Program Diploma III Teknik Mesin Fakultas Teknik Universitas Diponegoro
Sarwoko, Sarwoko
Program Diploma III Teknik Perkapalan Fakultas Teknik Universitas Diponegoro
Triyatno, Triyatno
Program Diploma III Teknik Mesin Fakultas Teknik Universitas Diponegoro
Seno Darmanto, Windu Sediono, Sarwoko, Triyatno, in this paper explain that making of callophylum inophylum biodiesel fuel is done alkaly transesterification methode. Alkaly transesterification methode use methanol and basa (NaOH) of catalist. Procedur and setting of research that is consisted in material selection, treatment and setting of composition of methanol and catalist, operational temperature, reaction time, speed and mixer technical will effect quality and conversion level of callophylum inophylum biodiesel. And based data analyzer show that conversion of callophylum inophylum biodiesel can reach 90%. Properties of callophylum inophylum biodiesel show viscosity and flash point of callophylum inophylum biodiesel is ligthly higher than diesel fuel. And caloric value of callophylum inophylum biodiesel is slightly lower than diesel fuel.
Key words: callophylum inophylum, biodiesel, properties, transesterification.
Vocational School Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4784
Gema Teknologi; Vol 16, No 4 (2012): October 2011 - April 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/32266
2020-11-12T22:07:45Z
gema_teknologi:ART
"201030 2020 eng "
2656-582X
0852-0232
dc
ANALISA ENGINE PROPELLER MATCHING (EPM) PADA KAPAL RESCUE BOAT KARENA PERUBAHAN TAHAP POWERING PROCESS
Baital, Muhammad Sawal
Program Studi D-IV Teknik Rekayasa Konstruksi Perkapalan, Sekolah Vokasi, Universitas Diponegoro http://sinta.ristekbrin.go.id/authors/detail?id=6146624&view=overview
Putranto, Ari Bawono
Program Studi D-IV Teknik Rekayasa Otomasi, SekolahVokasi, Universitas Diponegoro
Waluyo, Bambang Sri
Program Studi D-IV Teknik Rekayasa Konstruksi Perkapalan, Sekolah Vokasi, Universitas Diponegoro
engine; EPM; propeller; powering process
This study is to investigate compatibility between installed main engine in ship with propeller design using theoretical approach and data series. A triple screw rescue boat conducted hard chain hull was used for study and analyze the effect of the changes in powering process stage by observing the result of open water efficiency based on Wageningen Data Series with cavitation analysis has been neglected. The study is considered using intersection between propeller thrust with thrust coefficient and open water efficiency on Wageningen B-Series for fixed pitch propeller. The result indicated that propeller characteristic B5-76 with 41% of efficiency has compatibility with specification of installed main engine.
Vocational School Diponegoro University
2020-11-11 15:02:23
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/32266
Gema Teknologi; Vol 21, No 1 (2020): April 2020 - October 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8911
2020-04-17T20:10:21Z
gema_teknologi:ART
"121001 2012 eng "
2656-582X
0852-0232
dc
OTOMATISASI ALAT PENGEPAKAN PERMEN SKALA HOME INDUSTRI BERBASIS MIKROKONTROLER ATMEGA 8535
Arfianto, Dony Hardika
PSD III Teknik Elektro
Subali, Subali
PSD III Teknik Elektro
Dony Hardika Arfianto, Subali, in paper candy automation packing at home industry use ATMEGA 8535 microcontroller explain that in this modernization era, almost all activity uses of automation, both in the industrial middle, upper and home industry. If the process of candy packing can be automated it will be very advantageous for industrial-scale home industry. This candy packaging automation systems using a microcontroller ATmega 8535. The tool consists of a sensor LDR as sensor packaging, the heater as a tool for plastics pressing, conveyor as a driver and microcontroller ATmega 8535 as the main controller. Microcontroller ATmega8535 is one of the artificial Atmel microcontroller that has many uses. Price microcontroller is relatively cheap nowadays, if viewed from its facilities.
Keywords: packing, LDR sensor, heater, microcontroller ATmega8535
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8911
Gema Teknologi; Vol 17, No 1 (2012): April 2012 - October 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8927
2020-04-17T20:11:36Z
gema_teknologi:ART
2656-582X
0852-0232
dc
SIMULASI SISTEM PENGHITUNG JUMLAH MOBIL KELUAR DAN PENGHITUNGAN TARIFNYA BERDASARKAN LAMA WAKTU PADA GEDUNG PARKIR MOBIL BERLANTAI TIGA BERBASIS MIKROKONTROLER ATMEGA 8535
Ary M, Ruky Sandra
PSD III Teknik Elektro
Manan, Saiful
PSD III Teknik Elektro
Ruky Sandra Ary M, Saiful Manan, in this paper explain that parking lot which is widely used today do not present an empty parking location data, causing the vehicle entering the parking area must first find an empty parking space. This led to queues of vehicles becomes unavoidable. Even vehicles must berputarputar first to find an empty parking space. Therefore, it needs a parking system that can alert parking block capacity is still empty. Parking tariff determination system also plays an important role, most of the park determines the rate only on the type of vehicle rather than on how much time parking felt unjust for some people. This study designed a microcontroller-based parking system that can determine the number of cars remaining at the same time counting parking rates is a unified tool that can be divided into two, namely, hardware and software as a mechanical system that will work as a control system and the process of calculating tariffs.
Keywords: parking system, Microcontroller 8535, Infrared, parking rates, Password
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8927
Gema Teknologi; Vol 17, No 3 (2013): April 2013 -October 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8938
2020-04-17T20:12:22Z
gema_teknologi:ART
2656-582X
0852-0232
dc
EFFEK SAMPING PENGGUNAAN PONSEL
Enny, Enny
PSD III Teknik Elektro
Enny, in this paper explain that many mobile phone users around the us, but only a portion of the concerned about the dangers of cell phones. This paper was compiled to determine the impact and solutions of cell phone radiation. Mobile phones emit electromagnetic waves which will affect the surrounding environment. Based on existing information, cell phone radiation is thought to cause cancer. Waves emitted from mobile phones over the air is causing electromagnetic radiation. Potential disrubtion of health consequences of radiation electromagnetic field has become an issue which examined till now, so found a variety of health disorders as a result of mobile phone users that includes the impact of mild and severe impact. Experts have discovered some efforts to minimize the effects of cell phone radiation on health of mobile phone users. Every user should know the dangers of mobile phone users. Radiation caused cell phone not only arise when used, but when putting a cell phone in your Pocket can also be exposed to any radiation. Therefore, mobile users need to know how to use a cell phone. Users should pay attention to the level of radiation caused by cell phones, so that the influence of electromagnetic radiation on health can be scaled down for mobile users.
Keywords: side effects of cell phone use
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8938
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/19170
2020-04-17T20:15:58Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PEMBUATAN CREAM DETERGENT UNTUK MENINGKATKAN KETRAMPILAN IBU-IBU PKK
Kusumayanti, Heny
Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro
Budiyono, Budiyono
Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro
Dwimawanti, Ida Hayu
Departemen Administrasi Publik, FISIP, Universitas Diponegoro
Yesiana, Reny
Departemen Sipil dan Perencanaan, Sekolah Vokasi, Universitas Diponegoro
Purwanto, Agus
Fakultas Ekonomika dan Bisnis, Universitas Diponegoro
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Cream detergent; PKK ladies; training;
Cream detergent is often used in everyday life, serves to wash and clean the dirt (fat). In order to commemorate the day of kartini in 2018, held a training on making cream detergent in Kp. Krapyak RT 07 RW 11 Bintoro Demak. The pH cream detergent generated from this training is 11, this is in accordance with SNI 0062: 2016, where the pH max cream detergent is 11. The purpose of this devotion provides the transfer of science and technology appropriately to the mother of PKK and also to provide skills and entrepreneurship to PKK mothers.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/19170
Gema Teknologi; Vol 19, No 4 (2018): October 2017 - April 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21880
2020-04-17T20:15:09Z
gema_teknologi:ART
"171031 2017 eng "
2656-582X
0852-0232
dc
IMPLEMENTASI SCADA UNTUK MONITORING DAN CONTROLING SERTA KOORDINASI SISTEM PROTEKSI GARDU INDUK SISTEM 1,5 BREAKER PADA GARDU INDUK TEGANGAN EKSTRA TINGGI BERBASIS ARDUINO MEGA 2560 DENGAN TAMPILAN HMI
Gumelar B, Muhammad Adi
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Ariyanto, Eko
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
1.5 Breaker; Substation Protection; SCADA;
Muhammad Adi Gumelar B, Eko Ariyanto, SCADA is one tool that can monitor and control the system at the substation and can coordinate the protection system area when a disturbance occurs. SCADA monitors the device continuously. This paper is to understand Differential protection areas, CCP, Buspro, and CBF that work when there is interference, namely internal and external interference by applying SCADA as its coordination. 12V DC relay is used as PMT, ACS712 as CT, and Ethernet Shield as Modbus to connect Arduino Mega 2560 with SCADA. Arduino Mega 2560 functions as a controlling center of input and output. The input used is the ACS712 sensor as a detector of the current flowing in the circuit. The Arduino Mega 2560 output signal will be sent to SCADA using an Ethernet Shield and router. Status of substations 1.5 breakers can be monitored with HMI from anywhere by using the SCADA application. In the event of a disturbance, each ACS712 will start reading the current changes and will be processed by Arduino Mega 2560, so that it can determine the protection area that works and trip the relay, SCADA will automatically record disturbances and give an alarm to occur by turning on the protection LED and sounding buzzer alarm.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21880
Gema Teknologi; Vol 19, No 3 (2017): April 2017 - October 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21949
2020-04-17T20:14:01Z
gema_teknologi:ART
"161031 2016 eng "
2656-582X
0852-0232
dc
OTOMATISASI PENGATUR SUHU DAN WAKTU PADA PENYANGRAI KOPI ( ROASTER COFFEE ) BERBASIS ATMEGA 16 PADA TAMPILAN LCD ( LIQUID CRYSTAL DISPLAY )
Ristiawan, Masde
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Ariyanto, Eko
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Masde Ristiawan, Eko Ariyanto Roasting is one of the most important processes in processing coffee beans. So it takes an automatic coffee roaster machine that can support the home roasting process. Basically, this coffee roaster is a heating device, the temperature is regulated following the input setpoint. The heating process is produced by electric heating elements which are controlled by the relay. The temperature sensor used is K type MAXX 6675 Thermocouple. The minimum system of ATmega 16 is used as the overall system control, Users can monitor temperature values and timers, which are displayed via the LCD display. In roasting coffee, roasting weight and temperature are very influential in the length of roasting time. Maximum capacity of 350 gram coffee roasters. To roast coffee with a weight of 100 grams at a temperature of 100 ° C it takes 34 minutes for light maturity and a temperature of 130 ° C with the same weight takes 18 minutes.
Keywords : Thermocouple, Relay, Temperature, Sistem Minimum ATmega 16, LCD, Roaster Coffee.
References
• Sutanto, N. (2012). Rancang Bangun Coffee Producting Machine. Surabaya: Universitas Wijaya Putra.
• Wijaya, A. (2011). Rancang Bangun Alat Pemanas dan Pengaduk Terintergrasi dengan Temperatur dan Kecepatan Terkendali Berbasis Mikrokontroler. Depok : Universitas Indonesia.
• Perdana, Y. (2012). Rancang Bangun Alat Penyangrai Kacang Tanah dengan Penggerak Motor DC Berbasis Mikrokontroler AT89s51. Jakarta: Universitas Negeri Jakarta.
• Kurniawan, R. (2014). Sistem Pengendalian Suhu Menggunakan Metode Fuzzy Logic Pada Tungku Mesin Penyangrai Kopi. Jember : Universitas Jember.
• Amiq, B. (2015). Rancang Bangun Alat Penyangrai Kopi Semi Otomatis dengan Kapasitas 5Kg. Surabaya: Universitas Negeri Surabaya.
• Hartanto, S. (2012). Prototipe Pintu Bendungan Otomatis Berbasis Mikrokontroler ATmega 16. Yogyakarta: Universitas Negeri Yogyakarta.
• Kholatingulloh, T. (2015). Otomatisasi Pengatur Suhu dan Waktu Pada Oven Listrik Berbasis arduino yang ditampilkan pada LCD. Semarang: Universitas Diponegoro.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21949
Gema Teknologi; Vol 19, No 1 (2016): April 2016 - October 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/364
2020-04-17T20:06:51Z
gema_teknologi:ART
"101024 2010 eng "
2656-582X
0852-0232
dc
PROFIL SURJA HUBUNG KARENA PROSES ENERGIZED (PEMBERIAN TENAGA) PADA SALURAN TRANSMISI 500 KV
Yuniarto, Yuniarto
Yuniarto, in this paper explain that transient over voltage that happened because switching surge have to
be paid attention to don't cause the damage equipments of insulation coordination system. This research aim to
perceive the transient over voltage at the end of 500 kv transmission line caused energized process by using EMTP
(Electromagnetic Transients Program) as toll to simulate the energized process. Data for this research was taken
from 500 kv transmission line Ungaran-Pedan. From this research was expected can become a reference for power
company in planning insulation coordination at transmission line.
Result of research show that transient over voltage at the end of 500 kv transmission line caused energized
process reach more or less twice its nominal voltage
Key word : energized, karateristik, transient over voltage, EMTP
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/364
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/25922
2020-11-05T09:35:25Z
gema_teknologi:ART
"191031 2019 eng "
2656-582X
0852-0232
dc
SIMULASI DAN MONITORING KOORDINASI RECLOSER DAN SSO PADA JARINGAN DISTRIBUSI 20 KV PT. PLN (PERSERO) AREA SEMARANG PENYULANG KALISARI 07 BERBASIS ARDUINO MEGA 2560 DAN VT SCADA 11.2
Zuraida, Hanif
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Winarno, Heru
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=0dsIvPMAAAAJ
coordination of recloser and LBS SSO; ZMCT103C sensor; Arduino Mega 2560
Hanif Zuraida, Heru Winarno, in this article describes the simulation of protection equipment coordination systems, especially in the recloser and sectionalizer areas. Coordination between protective equipment to improve the network reliability system so that in the event of a disturbance, the area affected by the disturbance does not spread widely. The simulation tool is made using OMRON LY2N 12V relay, ULN2803 relay driver circuit, ZMCT103C current sensor, voltage divider voltage sensor, pull down, 12V 6W lamp as a load and several resistors with different resistivity values as interference. Arduino Mega 2560 is used as the central controller for the entire circuit. After the experiment, the results obtained are when the normal network current at the recloser is 0.86 A and the current at the LBS SSO1 is 0.43. The recloser and LBS SSO1 coordination lies in zone 2 and 3 disturbances. When simulated zone 2 interference, the recloser current rises to 1.28 A, causing reclose / trip to lock out recloser. When the recloser feels a fault current in zone 3 of 1.06 A and LBS SSO1 senses a current of 0.64 A. The recloser as protective equipment will open first within 1000 ms after sensing the disturbance. When the recloser opens, the voltage on the SSO will be 0 volts and the SSO will open within 1000 ms after the current and disturbance requirements are met. Then the recloser will close again after 2000 ms from the open condition.
Vocational School Diponegoro University
2019-10-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/25922
Gema Teknologi; Vol 20, No 3 (2019): April 2019 - October 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4712
2020-04-17T20:08:38Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PENGUJIAN MODEL DRIVING CYCLE KENDARAAN HONDA CITY BERBAHAN BAKAR PREMIUM
Mrihardjono, Juli
Program Magister Teknik Mesin, Program Pascasarjana UNDIP Semarang
Sinaga, Nazaruddin
Teknik Mesin, Universitas Diponegoro, Semarang
Juli Mriharjono, Nazaruddin Sinaga, in this paper explain that a driving cycle model can be used to estimate fuel consumption and exhaust gas emission. Driving cycle varies significantly for traffic conditions. Testing of driving cycle model, for a specific vehicle, is needed so that able to be used as fuel consumption and emissions estimation on real traffics. This paper studied driving cycle model in a laboratory. The EPA standard was reffered as the testing procedure. The vehicle used was Honda City 1.5L fueling with gasoline (premium - in Indonesia). The result shows that driving cycle model profile meets with the EPA standard. Changing gears, which affect to vehicle speed, was not affect significantly to fuel consumption which indicated by constant AFR during the cycle. The factors that cause the difference speed of vehicle were gas pedal operated manually, timing of changing gear, and gear operation time duration.
Keywords: Driving cycle, exhaust gas emissions, fuel consumption
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4712
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/32287
2020-11-12T22:07:53Z
gema_teknologi:ART
"201030 2020 eng "
2656-582X
0852-0232
dc
EKSTRAKSI SENYAWA BIOAKTIF THEAFLAVIN TEH OOLONG (CAMELLIA SINESIS) DENGAN AIR SEBAGAI GREEN SOLVENT
Amalia, Rizka
Program Studi Sarjana Terapan Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro http://orcid.org/0000-0002-6578-9757
Yulianto, Mohamad Endy
Program Studi Sarjana Terapan Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
Purwantisari, Susiana
Program Studi Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro
Yudanto, Yusuf Arya
Program Studi Sarjana Terapan Teknologi Rekayasa Kimia Industri, Sekolah Vokasi, Universitas Diponegoro
Pangestu, Ilyas Teguh
Program Studi D-III Teknologi Kimia, Sekolah Vokasi, Universitas Diponegoro
teh oolong; theaflavin; ekstraksi; green solvent; SARS-CoV-2
Theaflavin, a polyphenolic compounds found in oolong tea and black tea, thought to have medicinal potency. Theaflavins and their derivatives such as theaflavin gallate have shown a broad spectrum of antiviral activity against several viruses, including influenza A, B and hepatitis C viruses. Previous research show that theaflavins could inhibit RdRp activity through blocking the active site in the catalytic pocket of RdRp in SARS‐CoV‐2, SARS‐CoV and MERS‐CoV.. This research aims to extract theaflavins in oolong tea with water solvent at a temperature of 100oC, pressure > 1 atm and varied extraction times (10-60 minutes). The effect of oolong tea extraction time towards the theaflavin content was observed. The results showed that with the longer extraction time, the theaflavin levels were reduced due to the degradation of thermal theaflavins into thearubigins. The model exponential equation obtained is y=14,91488 e-0,2631x + 0,11865, with the R2=0.99161. The best operating conditions was obtained at 10 minutes of extraction time, resulted in 1.19% of the total theaflavin content of oolong tea.
Vocational School Diponegoro University
2020-11-11 15:02:23
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/32287
Gema Teknologi; Vol 21, No 1 (2020): April 2020 - October 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8812
2020-04-17T20:10:01Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
OPTIMALISASI HMI SCADA UNTUK MONITORING DAN KONTROL REPEATER RADIO KOMUNIKASI MENGGUNAKAN MODEM GPRS INTEK J65i-X
Aufa, Al Anamila Nur
PSD III Teknik Elektro
Yuwono, Teguh
PSD III Teknik Elektro
Al Anamila Nur Aufa, Teguh Yuwono, in paper SCADA HMI optimization for monitoring and control repeater using radio communication modem GPRS INTEK J65i–X explain that radio communications at PT PLN ( Persero ) APD Central Java and Yogyakarta is still a major communication medium for coordinating the work , both maintenance and handling of interference between units . Repeaters in this case an important role in the communication process between APD dispatcher JTY with Area - Area and officers in the field because of the presence of the communication range of the repeater spacing becomes wider . In operation repeaters can be susceptible to interference that can result in radio communications in the areas covered by the repeater to be disrupted so that the communication between the dispatcher APD JTY with Area - Area and field workers to be blocked. Handling repeater for this disorder is not maximized due to the lack of real time monitoring of the state of the repeater , so that when the repeater impaired in the device or on the supply , the clerk did not know in person and just waiting for a report from the repeater keeper at any time at the shelter is not a repeater . There needs to be a device that can monitor the state of the repeater , which if detected interference at the source , supply and radio , PPE JTY officer may direct monitoring , so that it can assist in the handling and analysis of causes of hearing disorders without having to come to the site . GPRS Modem Utilization Intek J65i - X allows retrieval status of the repeater equipment where it can not be done at this time . With facilities tapped digital inputs and digital outputs on the modem , any condition of equipments such as radio signal repeater RX , TX radio signal , battery , charger and 220V supply state of the supply voltage can be detected . From changes in the supply voltage available , can be detected by a GPRS modem Intek J65i - X so that when there is an interruption in the HMI SCADA can termonitoring in real time . With the monitoring and control of a radio repeater communications , personnel no longer need to go to the location (site ) only to find the cause of the disturbance . Interference analysis can also be performed before treatment is held further disruption . Reset control radio can also be done quickly if the radio have to hang in its operation , so that the future will be able to improve the performance of SCADA systems PT PLN ( Persero ) APD Central Java and DI Yogyakarta.
Keywords : repeater , modem GPRS Intek J65i - X , auxiliary relays , monitoring and control , HMI SCADA
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8812
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8922
2020-04-17T20:11:14Z
gema_teknologi:ART
2656-582X
0852-0232
dc
THERMAL OVERLOAD RELAY SEBAGAI PENGAMAN OVERLOAD PADA MINIATUR GARDU INDUK BERBASIS PROGRAMMABLE LOGIC CONTROLLER (PLC) CP1E-E40DR-A
Pradika, Hendy
PSD III Teknik Elektro
Moediyono, Moediyono
PSD III Teknik Elektro
Hendy Pradika, Moediyono, in paper thermal overload relay as a overload safety in miniature of substation based on programmable logic controller (PLC) CP1E-E40DR-A explain that at the substation there is a protective device that is very vital function, which we often refer breaker Power (PMT) or also called Circuit Breaker (CB). The function of the PMT itself is to connect or disconnect current / power corresponding branches if there is interference in substations or other transmission device or in the event of overload. At the substation's miniature PMT function is replaced by a contactor that functions more or less the same. Contactor performance is governed by OMRON CP1E PLC-E40DR-A which had previously received input from the Thermal Overload Relay in the event of overload. Thermal Overload Relay works on the principle of expansion and bimetal objects. When exposed to high current object, then the object will expand so it will bend and break the current. Excessive current will generate heat, so it can bend bimetal.Hal object will cause the contactor is connected to the Thermal Overload Relay will decide the electric current through the contactor. With this tool, we can realize the expected electric power system more secure in terms of security and reliability so as not to harm humans and the environment.
Keywords: substations, protection, PMT, overload, contactors, Thermal Overload Relay, Omron PLC CP1E-E40DR-A
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8922
Gema Teknologi; Vol 17, No 2 (2013): October 2012 - April 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8933
2020-04-17T20:12:02Z
gema_teknologi:ART
2656-582X
0852-0232
dc
PENGEMBANGAN ADSORBENT BED UNTUK PENINGKATAN KONDUKTIVITAS TERMAL MELALUI PENAMBAHAN PARTIKEL METAL ALUMINIUM
Ariwibowo, Didik
PSD III Teknik Mesin
Sutrisno, Sutrisno
PSD III Teknik Mesin
Didik Ariwibowo, Sutrisno, in this paper explain that this research is to increase thermal conductivity of a adsorbent bed by adding metal particles in it so that the bed become a granule-mixed bed. The adsorbent bed contains activated-carbon granule and aluminium particles. The research activity include: design and fabrication of adsorbent bed prototype following thermal performance study of the adsorbent bed. The thermal performance study of the adsorbent bed was conducted by varying metal/adsorbent ratio of 5%, 10%, 15% by volume. The result showed that adding 5%, 10%, and 15% aluminium particles into adsorbent bed has increased its thermal conductivity, those are 10,9 Wm-1K-1; 21,9 Wm-1K-1; and 30,9 Wm-1K-1 respectively from 1,6 Wm-1K-1 activated carbon thermal conductivity. The values of experimental thermal conductivity were higher than those of calculated thermal conductivity. The percentage of the difference between experimental thermal conductivity and calculated thermal conductivity decreased as bed surface temperature increased. The relatively higher percentage was in 45% whereas the lower was 10%. The lower range of the difference was 10-20% occurred in 55-65 oC temperature range.
Key words: adsorbent bed, metal/adsorbent ratio, thermal conductivity
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8933
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/19150
2020-04-17T20:15:33Z
gema_teknologi:ART
"180430 2018 eng "
2656-582X
0852-0232
dc
REALISASI PENGENDALI ON-OFF HISTERISIS DENGAN OPERATIONAL AMPLIFIER (OP-AMP)
Tadeus, Dista Yoel
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Manan, Saiful
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
On-Off Controller; Chattering; Hysterisis; Op-Amp Comparator;
The realization of the On-Off control system can be built using the comparator principle. The principle has a weakness that is the possibility of chattering due to 'thin' limit of comparator switching. Low immunity to noise increases chances of chattering, if not anticipated it will cause 'fatigue' on actuator thus reducing component’s lifetime. Hysteresis has features to suppress chattering. This article describes how to realize the hysteresis On-Off controller using Operational Amplifier (Op-Amp) which is simple and cheap discrete electronics component, by modifying the Op-Amp comparator circuit so that it has the hysteresis band with minimum and maximum limit variable so that the reference point of the comparator can be shifted.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/19150
Gema Teknologi; Vol 19, No 4 (2018): October 2017 - April 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21865
2020-04-17T20:14:39Z
gema_teknologi:ART
"170430 2017 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN PINTU WAHANA OTOMATIS MENGGUNAKAN SENSOR ULTRASONIK HC-SR04 SEBAGAI PENGUKUR TINGGI BADAN DAN SENSOR LOAD CELL DENGAN HX711 SEBAGAI PENGUKUR BERAT BADAN BERBASIS ARDUINO MEGA 2560
Lutfiyanto, Agung Hanifan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Automatic door; Arduino Mega 2560; HC-SR04 Ultrasonic sensor; Load Cell sensor; Servo Motor;
Agung Hanifan Lutfiyanto, Arkhan Subari, in this paper explain that at present, profit plyaground still uses manual measurement to select visitors who will enter the vehicle. Measuring just selecting one's height by putting aside weight can have a negative impact on the smoothness and safety of the playing area. Therefore, an automation is needed to measure body weight and height to be safer from game accidents and increase vehicle life to avoid damage. This design makes the device an automatic vehicle area entrance system using Arduino Mega 2560 for the main controller system supported by various sensors namely HC-SR04 ultrasonic sensor as a measure of prospective visitor height, 100 Kg Load Cell sensor as a measure of prospective visitor's weight and motor servo as the opening and closing door of the vehicle. When prospective visitors will enter the vehicle, prospective visitors stand on their height and weight gauges. Furthermore, Arduino compares with the standard height and weight previously set. If the weight and height are in accordance with the standard, the door will open automatically and visitors can enter the vehicle. For testing the prospective visitor's height as measured by the HC-SR04 ultrasonic sensor has an average error ratio of 1.01%, while testing prospective visitor's weight measured by sensor Load Cell has an average error ratio of 2.90% and is calculated quite accurate.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21865
Gema Teknologi; Vol 19, No 2 (2017): October 2016 - April 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21931
2020-04-17T20:13:08Z
gema_teknologi:ART
"151031 2015 eng "
2656-582X
0852-0232
dc
ALAT PENGHITUNG BERAT BADAN MANUSIA DENGAN STANDART BODY MASS INDEX (BMI) MENGGUNAKAN SENSOR LOAD CELL BERBASIS ARDUINO MEGA 2560 R3
Dewantara, Dewantara
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Sasmoko, Priyo
Program Studi Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Dewantara, Priyo Sasmoko, in this paper explain that a measuring instrument is a tool used by humans to help determine parameters such as height and weight. Most height and weight gauges used today still use simple and still conventional equipment. In addition, if manually, there are still frequent measurement errors that come from the measuring instrument itself or from the human. This happens because of inaccuracies in reading measuring instruments that lack precision or perhaps from the human factor itself. The purpose of this study was to create a digital height and weight automation system accompanied by displaying its ideal weight based on height. This system is built using Arduino as a system controller. The ultrasonic sensor is used as a measure of height. Load cell is used as a measure of weight. And a 20x4 LCD to display the output. From testing and analyzing the results of measurements of height according to the actual height, the results of measurements of weight have an error percentage of 0.53% - 2.77%. The system determines the ideal or not body weight based on BMI.
Keywords: 20x4 LCD, Load Cell Sensor, Arduino.
References
• Fogaswara, Eka. 2013. Prinsip Dasar Kelistrikan dan konversi energy untuk SMK/MAK. Bandung: CV ARMICO.
• Massimo dkk, Arduino/Genuino Mega 2560. 28 Juli 2015. https://www.arduino.cc/en/Ma in/ArduinoBoardMega2560. Diakses pada 28 Juli 2015.
• Anonim. Sensor. 5 September 2015. http://id.wikipedia.org/wiki/sensor. Diakses pada 5 September 2015
• Anonim. HX711 Weight Scale ADC Modul. 6 September 2015. http://www.vcc2gnd.com/Diakses pada 6 September 2015
• Arifai, Samsul. Dkk, 2014, Rangkain Catu Daya. http://s3.amazonaws.com/academia.e du.documents/ Diakses pada 24 Agustus 2015
• Malvino, Prinsip-prinsip Elektronika, Buku satu, Salemba Teknika, hal 66
• Anonim. Catu daya. 6 September 2015. http://profil.widodoonline.com /Elektronika/komponen/praktik um/teori-dasar-catu-daya.html
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21931
Gema Teknologi; Vol 18, No 3 (2015): April 2015 - October 2015
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/308
2020-04-17T20:06:31Z
gema_teknologi:ART
"101023 2010 eng "
2656-582X
0852-0232
dc
DAMPAK PEMBANGUNAN PLTN TERHADAP PERUBAHAN TATA RUANG KABUPATEN JEPARA
Setia Budi, Bambang
Bambang Setiabudi, in paper Study on effect of the NPP development toward spatial planning at District of Jepara had been done to support government policy according to governmental rule No. 5, Year of 2006 concerning National Energy Policy which nuclear energy is chosen as one of alternative energy source. The study was done by estimating growth of resident naturally with geometric method, increase of constructing labor pursuant to requirement of standard, and growth of resident as impact of economics growth and then to predict the land use change due to facilities requirement. Research result indicates that change of space pattern of non-agriculture settlement is equal to 15%. It also shows that growth of resident density rises to level of 31-45 person per ha.
Keywords : spatial planning, geometric, input-output analysis, policy
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/308
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/22707
2020-04-17T20:16:39Z
gema_teknologi:ART
"190430 2019 eng "
2656-582X
0852-0232
dc
DESKRIPSI TEKNIS PENGENDALI TINGGI MUKA CAIRAN INDUSTRI METODE FLOATLESS OMRON 61F
Tadeus, Dista Yoel
Teknik Elektro, Sekolah Vokasi , Universitas Diponegoro
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Liquid / Water Level Controller; floatless controller; Omron 61F;
Device for controlling liquid/water level using the floatless method uses the character of liquid conductivity as an electric current carrying medium. Excitation voltage is generated by the controller and passed to the electrode through an insulated conductor cable. The electrode is submerged in a tank or liquid storage vessel and directly becomes the lower limit and upper limit of the liquid level. Omron 61F is one of the industry-standard floatless control devices that is simple, compact and relatively inexpensive and easily available on the market. Some applications for controlling liquid levels such as water supply and drainage can be done easily and simple wiring. Omron 61F provides a variety of controller types that are tailored to the application conditions and the type of liquid used, ranging from purified clean water, dirty water, salt water, to several types of acidic liquids.
Vocational School Diponegoro University
2019-05-13 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/22707
Gema Teknologi; Vol 20, No 2 (2019): October 2018 - April 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4707
2020-04-17T20:08:59Z
gema_teknologi:ART
2656-582X
0852-0232
dc
SIMULASI SISTEM EKSITASI UNTUK KONDENSATOR SINKRON PADA PEMBANGKIT LISTRIK TENAGA ANGIN
Sukmadi, Tejo
Jurusan Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Tejo Sukmadi, in paper a model of wind energy power generation excitation system will be simulated. The focuse was on the modelling and parameters optimization of the DC1A type excitation systems for synchronous condenser as voltage regulation on the power plant. Excitation system optimization is made by using genetic algorithms method. The parameters optimization should have the optimal combination and the voltage regulation of wind energy power plants model find the best vale when there is a change in the wind speed. The simulation and analysis found that systems with excitation system parameterized combination of genetic algorithms experiment using crossovers opportunities 0.6 and mutations opportunities 0.032, which Ka = 297.2350, Ke = 0.6162, Kf = 0.01, Ta = 0.01, Te = 0.01 and Tf = 0.6278 is the best combination of excitation parameters obtained. By generating the 115.6604 ITAE value, over shoot 1,54%, steady state 0,44 s, the smallest voltage value after wind speed change is 0.9957 pu and the largest voltage value after wind speed change is 1.0025 pu.
Keywords : wind energy power generation, excitation system, synchronous condenser, genetic algorithms.
Vocational School Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4707
Gema Teknologi; Vol 16, No 4 (2012): October 2011 - April 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/29381
2020-05-29T15:02:39Z
gema_teknologi:ART
"200430 2020 eng "
2656-582X
0852-0232
dc
IMPLEMENTASI IDENTIFIKASI SISTEM METODE BLACK BOX PADA MOTOR DC MENGGUNAKAN CORRELATION ANALYSIS DAN MODEL ARX
Mangkusasmito, Fakhruddin
STr.Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro
Tadeus, Dista Yoel
STr.Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro
Subari, Arkhan
STr.Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=_PO4HH0AAAAJ http://orcid.org/0000-0002-0425-0619
Identification System, DC Motor; PRBS; correlation analyisis; ARX Model; MATLAB
The identification system is a procedure to obtain a model of a system, then of the model will be validated to see the accuracy of the model is obtained, compared to the input-output results obtained from the experiments. In the identification system itself known two methods, the method of "non-parametric" and "parametric". On the other hand, DC motor is a type of motor that uses direct electric current to produce rotational mechanical energy and is widely used in various applications. In this study, input and output data acquisition will be performed on the Feedback brand DC motor, and the data will be processed so that the system model is obtained by the black box method. The data will then be processed with the help of MATLAB software. The input signal used in this experiment is Pseudorandom binary sequence (PRBS), which is used because it has a wide frequency range. The signal is generated by an arduino uno microcontroller. From the test results it was found that the validation of the non parametric system model with the correlation analysis method has a fitness value of = 83.19%, while the validation of the parametric system model with the least square ARX method has a fitness value of = 80.59%.
Vocational School Diponegoro University
2020-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/29381
Gema Teknologi; Vol 20, No 4 (2020): October 2019 - April 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8807
2020-04-17T20:09:41Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
SISTEM PENYIRAMAN TANAMAN ANGGREK MENGGUNAKAN SENSOR KELEMBABAN DENGAN PROGRAM BORLAND DELPHI 7 BERBASIS MODUL ARDUINO UNO R3
Widhi, Happy Nugrahaning
PSD III Teknik Elektro Undip
Winarno, Heru
PSD III Teknik Elektro Undip
Happy Nugrahaning Widhi, Heru Winarno, in paper orchid plant watering system using humidity sensor used Borland Delphi 7 based on arduino uno R3 explain that the utilization of variable moisture for plant watering orchids do not fully utilized. At this time watering orchids is still done manually. It certainly took a lot of time, by making a watering system based on this moisture will save time. To determine the value of temperature and humidity used SHT-11 module is capable of detecting the temperature from -40C to 123,8˚C and relative humidity from 0% RH to 100% RH. Watering plants Phalaenopsis amabilis orchids species do when the SHT-11 detects the humidity inside the orchids house below 60% RH. Watering is carried out by spraying water from above directly into the plant’s roots. The method of watering is intended that the water can be poured directly absorbed by the plant. This control system controlled by arduino uno microcontroller. As for the computer control system, used Borland Delphi 7 to make aplication for control. So this watering system is divided into two they are automated systems and control through computer system
Keywords: Module SHT-11, Arduino UNO, Borland Delphi 7.
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8807
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/36650
2022-06-21T07:53:00Z
gema_teknologi:ART
"210430 2021 eng "
2656-582X
0852-0232
dc
PENGEMBANGAN KONSEP OPEN GOVERMENT UNTUK MENINGKATKAN KUALITAS LAYANAN KOTA PALEMBANG (STUDI KASUS : KOTA PALEMBANG)
Romadhon, Tri Akhyari
Program Studi Teknik Informatika, Universitas Bina Darma
Herdiansyah, M. Izman
Program Studi Teknik Informatika, Universitas Bina Darma
E-government; Open Government; Quality
Open Government is committed to improving the quality of information availability on government activities, supporting civil society participation in government, upholding professional standards in public administration to prevent corruption, abuse of power and increasing access to the use of new technologies to support accountability and openness. Currently, many governments have implemented e-government which supports the government's goals in open government. Where, e-government is used to describe the use of technology in carrying out several government tasks. The city government of Palembang has several applications or e-government systems that are open government. The city government of Palembang has not made a quality measurement of the e-government that has been implemented, so it is not known the level of quality in each application or system implemented. Based on this explanation, it is necessary to analyze the level of service quality in the system that has been implemented by the Palembang City Government.
Vocational School Diponegoro University
2021-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/36650
Gema Teknologi; Vol 21, No 2 (2021): October 2020 - April 2021
eng
Copyright (c) 2021 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8917
2020-04-17T20:10:50Z
gema_teknologi:ART
"130401 2013 eng "
2656-582X
0852-0232
dc
KWH METER DIGITAL DENGAN SISTEM PRABAYAR BERBASIS IC BL0932 DAN MIKROKONTROLER 38024
Lukito, Bimo Kristianto
PSD III Teknik Elektro
Winarno, Heru
PSD III Teknik Elektro
Bimo Kristianto Lukito, Heru Winarno, in paper prepaid digital KWH meter based on IC BL0932 and microcontroller 38024 explain that an analog meter kWh used by PLN placed in homes. Has several drawbacks, including the effects of age and weather making its numbers less opaque and can be seen. Read error resulted in the use of electrical power and recording electricity bills electricity that could harm users. To overcome these problems made a digital kWh meter with prepaid systems, with the advantages of digital display are lit and large enough. The system replaced the way payments are prepaid, by using an electronic prepaid card replacement bills. Digital kWh meter is controlled by a microcontroller with type 38024 and type IC BL0932 uses a function to read the voltage and current (with load reaches 1300 watts) to determine the energy used in home installations using the LCD as a data viewer that the amount of electrical energy used at home . The payment system by purchasing an electronic voucher, containing a digital scale (functioning as a pulse) as a comparison of the amount of energy used. This system automatically decides if the magnitude of the voltage reaches a value of 0.
Keywords : digital kWh meter, IC BL0932, microcontroller 38024
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8917
Gema Teknologi; Vol 17, No 2 (2013): October 2012 - April 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8978
2020-04-17T20:12:48Z
gema_teknologi:ART
"150401 2015 eng "
2656-582X
0852-0232
dc
SENSOR FIBER OPTIK BF4R SEBAGAI PENDETEKSI WARNA PADA ALAT PENSORTIR BOBBIN BENANG BERBASIS PLC OMRON CP1E-N 30 DRA DAN SCADA
Fasila, Akbar Tandu
PSD III Teknik Elektro
Winarno, Heru
PSD III Teknik Elektro
Akbar Tandu Fasila, Heru Winarno, in this paper explain that in the modern era, the progress of technology is very important in their daily lives, particularly in the industrial sector. Changes to automated manual system is very developed in order to achieve the maximum point of production and reduce the level of error that often occur in manual systems. It also affects the yarn spinning industry yanl, g now utilize the tools pensortir menerapkkan yarn bobbins with pneumatic system, PLC and SCADA. Planning tool making this sort can not be separated from the fiber optic sensor for identifying the color on each bobbin thread through the intensity of light that is captured by a fiber optic sensor tersbut. The workings of the system works and consists of two cylinders Pneumatic that serves as the actuator, two sensors fiber optics for detecting the light intensity on the bobbin thread, one unit PLC OMRON CP1E-N 30 DRA as the main controller systems, and SCADA as the monitoring system works.
Keywords: Bobbin Thread, PLC, SCADA, Fiber Optic Sensor.
Vocational School Diponegoro University
2015-08-21 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8978
Gema Teknologi; Vol 18, No 2 (2015): October 2014 - April 2015
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21081
2020-04-17T20:16:20Z
gema_teknologi:ART
"181116 2018 eng "
2656-582X
0852-0232
dc
STANDART PELAYANAN MINIMAL (SPM) DAN SISTEM LASING PADA KAPAL RO-RO UNTUK KESELAMATAN TRANSPORTASI PENYEBRANGAN LAUT (Studi Kasus KMP. LEGUNDI)
Ariany, Zulfaidah
Teknik Perkapalan, Sekolah Vokasi, Universitas Diponegoro
Hendra, A
Teknik Perkapalan, Sekolah Vokasi, Universitas Diponegoro
Febriary, Samual
Teknik Perkapalan, Sekolah Vokasi, Universitas Diponegoro
Minimum Service Standards (SPM); Lasing System; Ferry R0-Ro Ship;
Zulfaidah Ariany, A Hendra, Samual Febriary, in this paper explain that LEGUNDI is a Passanger Ship which has a Surabaya - Lombok shipping route capable of transporting passengers and vehicles in relatively large numbers. Research Minimum Service Standards (SPM) and Lasing System on Ro-Ro Ship for Marine Transportation Safety is aimed to know about Minimum Service Standards (SPM) and how to handle the Lasing system on Ro-Ro KMP LEGUNDY. The reference used is Minister of Transportation Regulation no 30 of 2016 regarding minimum service standard. The analysis used is simulation of shear load calculation on vehicle in Car Deck so get output layout of vehicle parking layout. The result of simulation of the calculation got the total load when the car shifted 35,5 KN then it can be suggested using breaking strength: 60 kN (6 ton) and Weight 0.35 kg based on Break Load Capacity Table for Chain Lasingbe typed in one paragraph and one-column format.
Vocational School Diponegoro University
2018-11-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21081
Gema Teknologi; Vol 20, No 1 (2018): April 2018 - October 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21910
2020-04-17T20:13:40Z
gema_teknologi:ART
"160430 2016 eng "
2656-582X
0852-0232
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ALAT PEMANTAU PENGOSONGAN AKUMULATOR 12V/ 5Ah BERBASIS ARDUIONO UNO
Putri, Tsamaroh Nidaa
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Sasmoko, Priyo
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Tsamaroh Nidaa Putri, Priyo Sasmoko explains that accumulator is a combination of several pieces of cells used for altering the chemical energy into electricity energy used in motor vehicles. Accumulators are used continuously will shrink and drop so it needs to be recharged. To know the state of the battery voltage drop experienced the need for a measurement to determine the ability of the accumulator. Design manufacture accumulator discharge monitoring tool consists of a voltage divider circuit to know the big accumulator voltage in percentage form. Used also an ACS712 current sensor to detect the discharge current and LM35 temperature sensor to determine the temperature of the accumulator. The control system used is the Arduino UNO microcontroller and an LCD for displaying the measurement data. Normal voltage ranges accumulator 12,5V - 13,8V. Accumulator with a capacity of 5Ah takes 8 hours to process discharge when using 20 watt lamp load. If the voltage of the first accumulator on the LCD shows the percentage of 0 % then automatically the system will work to discharge for a second accumulator. The duration of use depends on the large accumulator load used.
Keyword:Accumulator, ACS712, capacity accumulator, Arduino UNO
References
• Agustin, Leonandi. 2015. Rancang Bangun Sistem Monitoring Kondisi Aki Pada Kendaraan Bermotor. Skripsi. Universitas Tanjungpura Pontianak.
• Andri, Helly. 2010. Rancang Bangun System Battery Charging Automatic. Skripsi S1 Teknik Elektro Fakultas Teknik Universitas Indonesia.
• Asnan, Zainal. 2007. Alat Pengecekan Kapasitas Aki (Accu) Berbasis Personal Computer. Skripsi. Universitas Katolik Widya Mandala Surabaya.
• Bishop, Owen. 2004. Dasar-dasar Elektronika. Jakarta: Erlangga, Alih Bahasa Irzam Harmein.
• Fadli, Usman. 2015. Aplikasi Sensor Arus ACS712 Dan Borland Delphi 7.0 untuk Monitoring Penggunaan Daya Listrik pada Rumah Berbasis Arduino UNO. Tugas Akhir. Universitas Diponegoro.
• Frank D. Petruzella., 2001, Elektronika Industri. Yogyakarta: Penerbit ANDI, Penerjemah Suminto, Drs. MA.,
• Kadir, Abdul. 2013. Panduan Praktis Mempelajari Aplikasi Mikrokontroler dan Pemrogamannya Menggunakan Arduino. Yogyakarta: Penerbit ANDI.
• Marpaung, May Harpri Rabiman. 2014. Monitoring Suhu dengan Menggunakan Sensor Suhu LM35 Serta Pengaturan Suhu Pada Otomatisasi Dispenser Berbasis Arduino UNO dengan Tampilan LCD. Tugas Akhir. Universitas Diponegoro.
• Salim, Emil. 2014. Perancangan dan Implementasi Telemetri Suhu Berbasis Arduino UNO, Skripsi. Universitas Sumatra Utara.
• Setiyawan, Danang Duwi. 2015. Pengisi Baterai Akumulator Otomatis Berbasis Mikrokontroller. Tugas Akhir. Universitas Gajah Mada.
• Tooley, Michael. 2003. Rangkaian Elektronik Prinsip dan Aplikasi. Jakarta: Erlangga, Alih Bahasa Irzam Harmein
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21910
Gema Teknologi; Vol 18, No 4 (2016): October 2015 - April 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/22133
2020-04-17T20:07:37Z
gema_teknologi:ART
"110430 2011 eng "
2656-582X
0852-0232
dc
RISET APLIKASI KESELAMATAN KEBAKARAN DI KAPAL
Ariany, Zulfaidah
Program Studi Diploma III Teknik Perkapalan Fakultas Teknik Universitas Diponegoro
Zulfaidah Ariany, in this paper explain that fire ship at sea is a dangerous thing, both on the ship itself or on its passengers. Crew boat had put out the fire without the help of other collateral. Without a good extinguishing system will certainly result in damage to the ship and would endanger the safety of the soul crew and passenger ships.
Ship fire safety research conducted by various parties including government organizations and non governmental organizations and academic institutions related to fire safety aspects of shipping and ship.
The need for revision of regulations that have been enacted sail for this through the provision of research. Research conducted to gain understanding of the dangers that may occur on the ship, and a good method for controlling and extinguishing the fire. Research that was conducted earlier used as a basis in research notes or to come.
Keywords : ship fire, fire safety
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/22133
Gema Teknologi; Vol 16, No 2 (2011): October 2010 - April 2011
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/1628
2020-04-17T20:07:19Z
gema_teknologi:ART
2656-582X
0852-0232
dc
METODOLOGI PENGEMBANGAN MODEL SIMULASI UNTUK EVALUASI KESELAMATAN PENUMPANG FREEFALL LIFEBOAT
Windyandari, Aulia
Program Diploma III Teknik Perkapalan
Fakultas Teknik Universitas Diponegoro
Aulia Windyandari, in paper simulation model of development method for passenger savety evaluation of freefaal lifeboat explain that since the launching procedure of Freefall Lifeboat (FFL) may have an impact with the water surface, the occupant injury is possible be occured in the evacuation process of the offshore structures. The FFL shock acceleration has been conducted by the impact force when the lifeboat entry the water surface. If the shock acceleration over the human conciousness allowance, the serious injury will be happened during the FFL launching.
According to the conditions, the IMO regulations have standard for the acceptance criteria of FFL shock acceleration induced by water entry impact load. The results measurement of Combined Acceleration Ratio Index (CAR) or Combined Dynamic Response Ratio Index (CDRR) should be comply with the IMO index criteria.
In this paper, the methodology of FFL acceleration response prediction by the simulation model analysis will be proposed. The simulation model will be developed by using LS-Dyna code. The Simplified Arbitratry Lagrangian Eulerian Coupling will be used to define the coupling analysis between the Lifeboats (Lagrangian elements) with Water Fluids (the Eulerian Elements)
Keywords: Free Fall Lifeboat, Response Acceleration, Impact Load
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/1628
Gema Teknologi; Vol 16, No 2 (2011): October 2010 - April 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/26233
2020-05-29T15:02:39Z
gema_teknologi:ART
"200430 2020 eng "
2656-582X
0852-0232
dc
AKUISISI DATA MENGGUNAKAN LABVIEW DENGAN ARDUINO SEBAGAI PERANGKAT KERAS BERBIAYA RENDAH
Bagenda, Dadan Nurdin
Elektronika, Politeknik Negeri Bandung https://scholar.google.com/citations?hl=id&user=gf-emYAAAAAJ
Rudati, Paula Santi
Elektronika, Politeknik Negeri Bandung
Low Price DAQ; LabView; LINX; Arduino DAQ
Industrial and academic laboratories cannot be separated from the use of DAQ, most of industrial automation generally requires massive amounts of DAQ and high speed. DAQ LabView software provides various facilities so that projects can be faster. Honestly, the price of hardware for DAQ is relatively expensive, luckily LabView give the opportunity to support ability many hardware including Arduino Board. Using the LINX library from Makerhub are free, so that the DAQ Practicum as industry standard can be done by affordable prices. The results without Linx, the average travel time for serial deliveries is 5.98 us/byte at 2Mbps. With Linx, "loop rate (Hz)" feature is valid as a 2-time (trigger-echo) measurement, and the data transmission time is below 20.41 ms, the digital DAQ of 2-way by (trigger-echo) is 20.41, also flip-flop transmission has an average time 13.7 ms/loop, also analog DAQ from LM35 have average time 7.87 ms/loop.
Vocational School Diponegoro University
2020-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/26233
Gema Teknologi; Vol 20, No 4 (2020): October 2019 - April 2020
eng
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/download/26233/74710
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4785
2020-04-17T20:09:15Z
gema_teknologi:ART
2656-582X
0852-0232
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EKSTRAKSI ASAM LEMAK BEBAS DARI MINYAK NABATI DENGAN METANOL KAJIAN PERPINDAHAN MASSA
Wahyuningsih, Wahyuningsih
Program Studi Diploma III Teknik Kimia
Fakultas Teknik Universitas Diponegoro
Endy Yulianto, Moh
Program Studi Diploma III Teknik Kimia
Fakultas Teknik Universitas Diponegoro
Wahyuningsih, Moh Endy Yulianto, in this paper explain that extraction of free fatty acids from vegetable oils with methanol performed in batch stirred tank, in a variety of conditions. Variables experiments in liquid-liquid extraction including temperature, solvent ratio and rotational speed stirrer. This study aims to develop a correlation coefficient of mass transfer in extraction of free fatty acids from vegetable oils methanol. Rresearch was conducted in two phases. Was the first stage liquid-liquid extraction experiments in laboratory. Second step is the development of an empirical correlation for the mass transfer coefficients in the form of numbers not berdemensi results showed that the greater the temperature, turn the mixer speed and solvent-feed ratio of the mass transfer koffisien gained greater. Mass transfer coefficient expressed in Sherwood number and correlated against the Reynolds number, Schmitd, (dP / dT) and (L / S), the results obtained:
Sh = 4,669 x 10-5 Re 0,462 Sc0,5 (dP/dT)0,308 (L/S)0,187
If used to calculate the mass transfer coefficients, have an average error of 8.79% for the regression line. This equation was developed in the Re number range 3169 to 11 750; numbers Sc 6321 to 9896, (dp / dT) from 0.0007 to 0.0013 and (L / S) of 0.333 to 1.
Keywords: nabati oil extraction
Vocational School Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4785
Gema Teknologi; Vol 16, No 4 (2012): October 2011 - April 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/31659
2022-06-21T07:53:00Z
gema_teknologi:ART
"210430 2021 eng "
2656-582X
0852-0232
dc
SISTEM INVENTARISASI PENGGUNAAN PERALATAN DAN BAHAN PADA MEJA PRAKTIKUM PLC DI POLITEKNIK MANUFAKTUR NEGERI BANGKA BELITUNG MENGGUNAKAN BARCODE SCANNER
Nofriyani, Nofriyani
Politeknik Manufaktur Negeri Bangka Belitung
Budiono, Adhi
Politeknik Manufaktur Negeri Bangka Belitung
Charlotha, Charlotha
Politeknik Manufaktur Negeri Bangka Belitung
Dwisaputra, Indra
Politeknik Manufaktur Negeri Bangka Belitung
Ramdhani, Dedy
Politeknik Manufaktur Negeri Bangka Belitung
barcode; inventory; PLC
In the Programmable Logic Controller (PLC) course at Polmanbabel, students use a practicum table containing practicum equipment such as computer units, compressors, PLC units, pneumatic valves, sensors, jumper cables, etc. Before and after practicum, students are required to do an inventory of equipment and materials contained on this practicum desk. The inventory process is still done manually, where students write the name of the equipment, check the presence of the equipment, and calculate the amount. The thing that was complained by lecturers was the confiscation of practicum time as a result of the manual inventory process. Based on this, a new inventory system was created that uses the application and is equipped with a barcode scanner that is able to minimize the time and possibility of misplacement of the device. Based on the results of experiments, it can be seen that this system is able to minimize inventory time by an average of 14.65 minutes compared to manual inventory systems.
Vocational School Diponegoro University
2021-04-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/31659
Gema Teknologi; Vol 21, No 2 (2021): October 2020 - April 2021
eng
Copyright (c) 2021 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8912
2020-04-17T20:10:26Z
gema_teknologi:ART
"121001 2012 eng "
2656-582X
0852-0232
dc
PEMAKAIAN BAHAN BAKAR GAS MENJADI ALTERNATIF BAGI KENDARAAN BERMOTOR BERBAHAN BAKAR PREMIUM
Indartono, Indartono
PSD III Teknik Mesin
Indartono, in paper use of alternative fuel gas for a motor vehicle fuel oil explain that in many ways energy efficiency can also be more than just preservation. Energy efficiency is an attempt to reduce the use of petroleum materials and the selection of alternative fuels. Improved energy efficiency is also an environmental demands, because it can reduce air pollution, acid rain control the incidence and protect the earth from global warming, which may occur due to buildup of carbon dioxide in the atmosphere. One of the alternative fuel is CNG. In motor vehicles, CNG usage advantages include lower price, the exhaust gas is cleaner burning results and the potential source is still very large.
Keywords: energy efficiency, fuel, CNG
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8912
Gema Teknologi; Vol 17, No 1 (2012): April 2012 - October 2012
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8928
2020-04-17T20:11:40Z
gema_teknologi:ART
2656-582X
0852-0232
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PEMANFAATAN SMS GATEWAY DENGAN GAMMU DAN WEBCAM BERBASIS VISUAL BASIC 6.0 PADA SISTEM KEAMANAN RUMAH
Islahuddin, Muhammad Ishaq
PSD III Teknik Elektro
Subari, Arkhan
PSD III Teknik Elektro
Muhammad Ishaq Islahuddin, Arkhan Subari, in this paper explain that in a home security system is very important information dissemination system. One of them by the use of SMS Gateway. By using Gammu and MySQL as a database and use a webcam as a tool for monitoring room in the house. The way this system works is a home security system using a PIR sensor detecting human movement. After that, if the data from the sensors in the microcontroller. Microcontroller then sends the data to a computer through a serial port. On the computer there is a VB 6.0 application. when the PIR sensor detects the presence of a human, the computer will be otomstis capture and send SMS alerts to a database of numbers that have been stored.
Keywords : Webcam, SMS Gateway, Gammu, MySQL, Visual Basic 6.0 .
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8928
Gema Teknologi; Vol 17, No 3 (2013): April 2013 -October 2013
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8939
2020-04-17T20:12:25Z
gema_teknologi:ART
2656-582X
0852-0232
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APLIKASI METODA LINE OF BALANCE (LOB) DAN METODA CRITICAL PATH METHOD (CPM) DALAM PENJADWALAN KEGIATAN PEMBANGUNAN PERUMAHAN
Sutanto, Sutanto
PSD III Teknik Sipil
Sutanto, in this paper explain that line of Balance is a variation of the linear scheduling method that allows the operating balance so that all activities can continue. In the various International leteratur usually shown as Line of Balance scheduling tool that is only suitable for the project - a project that is composed of repetitive activities, and is not suitable for non-repetitive projects. Network method is introduced towards the end of the 1950s by a team of engineers and mathematicians from Dupont company is working with the Rand Corporation, in an effort to develop a management control system. These systems are intended to plan and control a large number of which have a complex dependency relationship in the construction of engineering design problems and maintenance. Businesses - emphasized efforts to seek methods to minimize the costs, in conjunction with the completion of a period of activity. The system was then known as the critical path method (Critical Path Method/CPM). Research application method Line of Balance (LOB) and Critical Path Method (CPM) scheduling activities in residential construction and the impact on the field of technical constraints is one solution . Conclusions obtained from the results of the research, the use of residential construction projects activities scheduling with Line of Balance method combined with the Critical Path Method method would have added value.
Keywords: Housing Development, Application lob and CPM scheduling method.
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8939
Gema Teknologi; Vol 17, No 4 (2014): October 2013 - April 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21075
2020-04-17T20:16:02Z
gema_teknologi:ART
"181116 2018 eng "
2656-582X
0852-0232
dc
DESKRIPSI TEKNIS PENGENDALI TEMPERATUR INDUSTRI SEBAGAI BAGIAN DARI SISTEM REGULASI TEMPERATUR
Tadeus, Dista Yoel
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Setiono, Iman
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Temperature regulation; industrial temperature controller; ON-OFF control; PID
Dista Yoel Tadeus, Iman Setiono, in this paper explain that temperature regulation is one of the most important needs for the industry. Lots of processes and production are carried out under certain temperature conditions and free from interference. Industrial temperature controller is one of the basic equipment to meet these needs. On the market there are various types, specifications, and brands of temperature controllers, but have similarities with one another mainly lies in the basic functions of temperature regulation capabilities. This article describes the background of industrial temperature controllers principal, also covers control concepts, basic controller configurations, control methods, actuator equipment support, and examples of sensor parameter settings and controls on the Autonics TC4S series temperature controllers.
Vocational School Diponegoro University
2018-11-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21075
Gema Teknologi; Vol 20, No 1 (2018): April 2018 - October 2018
eng
Copyright (c) 2018 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21881
2020-04-17T20:15:13Z
gema_teknologi:ART
"171031 2017 eng "
2656-582X
0852-0232
dc
RANCANG BANGUN MEMONITOR ARUS DAN TEGANGAN SERTA KECEPATAN MOTOR INDUKSI 3 FASA MENGGUNAKAN WEB BERBASIS ARDUINO DUE
Wilutomo, Resnu Mauliyana Mukti
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
Yuwono, Teguh
Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro
voltage sensor; current sensor; speed sensor; C ++ language programming; PHP;
Resnu Mauliyana Mukti Wilutomo, Teguh Yuwono, 3 phase induction motor must work well and safely. Many types of interference have the potential to interfere with motor performance or even damage the motor itself, including due to power instability which includes imbalance between phase voltages and more phase currents. Monitoring an industrial activity especially monitoring the protection system is very important, it is intended that the disturbance that occurs in the 3 phase induction motor can be analyzed for the value and type of interference. Rapid technological development requires a monitoring system that is practical, fast and accurate. Sensors installed on this device are current sensors, voltage sensors, and speed sensors. The read, current, voltage and speed will be used as input signals to Arduino using the ADC (Analog to Digital Converter) process, Arduino programming uses C ++ language. ESP8266 wifi module) will upload the data from the ADC (Analog to Digital Converter) process to the database which is then displayed on the web using the available internet network. The web programming language used is PHP. This tool makes it easy to monitor a 3 phase induction motor because it can be done anytime and anywhere. There was a difference of ± 0.24A between the Tang Ampere measuring instrument and reading on the web. A ± 4V difference occurs between the Multimeter measuring instrument with readings on the Web. The maximum speed of the 3-phase induction motor with no load is 22Rpm between the tachometer gauge and the web display.
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21881
Gema Teknologi; Vol 19, No 3 (2017): April 2017 - October 2017
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/21956
2020-04-17T20:14:06Z
gema_teknologi:ART
"161031 2016 eng "
2656-582X
0852-0232
dc
ALAT UKUR TDS (TOTAL DISSOLVED SOLID) AIR GARAM DENGAN RESISTIF SEBAGAI INDIKATOR
Dewa, Aloisius Wisnu Lalita
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Sasmoko, Priyo
Program Studi Diploma III Teknik Elektro
Sekolah Vokasi Universitas Diponegoro
Aloisius Wisnu Lalita Dewa, Priyo Sasmoko in this paper explain that, physical water quality can be identified in various ways, one of which is measuring the amount of solute called Total Dissolved Solid (TDS). This study aims to design and make a TDS solution by using two electrodes as sensors. These two electrodes flow alternating current and negative values alternately into water. Analog signal in the form of voltage is read by the microcontroller by converting it into a digital signal, then the microcontroller processes the data and displays the TDS value. Tests are carried out by measuring the same solution using TDS meters and salt water TDS. Testing starts from a solution of 175 ppm to 8500 ppm. Making solutions based on TDS meter factory production. The results of salt water TDS measurements showed that the measured tds values increased from 173 ppm to 8007 ppm. Error reading at 8500 ppm, this is because the reading distance of salt water TDS is only up to 8260 ppm.
Keywords : TDS, conductivity, electroda, measurement device.
References
• Malvino. 1995. Prinsip-prinsip Elektronkai. Jakarta : Erlangga.
• Rusmadi, Dedy. 2001. Mengenal Komponen Elektronika. Bandung : Pionir Jaya
• Sumariyah, Yulianto. T, Priyono J, 2006. Rancang Bangun Sistem Pengukur Konduktivitas Larutan Elektrolit Menggunakan Mikrokontoler AT89C51. Program Studi Fisika Fakultas MIPA Universitas Diponegoro. Semarang.
• Utomo, D. 2012. Alat pengukur resistansi konduktivitas. dan Total dissolved solids air dengan Teknik dorong-tarik. Program Studi Sistem Komputer. Fakultas Teknik Elektronika dan Komputer. Universitas Kristen Satya Wacana. Salatiga.
• Wiono.A,Rahmawati. E, 2014. Perancangan Dan Pembuatan Alat Ukur Konduktivitas Larutan Berbasis Mikrokontroler. Program Studi Fisika Fakultas MIPA Universitas Negeri Surabaya. Surabaya
Vocational School Diponegoro University
2018-05-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/21956
Gema Teknologi; Vol 19, No 1 (2016): April 2016 - October 2016
eng
Copyright (c) 2019 GEMA TEKNOLOGI
oai:ojs.ejournal.undip.ac.id:article/365
2020-04-17T20:06:56Z
gema_teknologi:ART
"101024 2010 eng "
2656-582X
0852-0232
dc
PENGARUH BENTUK DAN BERAT DALAM PERANCANGAN KAPAL BARANG CEPAT
Julianto Sasono, Eko
Eko Julianto Sasono, in this paper explain that cargo ship express represent the ship type developed and
checked by Japan government in order to overcoming transportation problems by transport service in the land.
Cargo ship express developed in two form, that is type of TSL-F and TSL-A. Determination form and ship weight
express this very having an in with of speed and load capacity, in the plan laboured by a cargo ship express own the
big cargo hold and light machine.
Keywords : Cargo ship express, load capacity, speed.
Vocational School Diponegoro University
2010-10-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/365
Gema Teknologi; Vol 16, No 1 (2010): April 2010 - October 2010
eng
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oai:ojs.ejournal.undip.ac.id:article/25779
2020-11-05T09:35:25Z
gema_teknologi:ART
"191031 2019 eng "
2656-582X
0852-0232
dc
KINERJA ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS (OFDMA) PADA TEKNOLOGI RADIO OVER FIBER (ROF)
Rakhmania, Amalia Eka
Jurusan Teknik Elektro, Politeknik Negeri Malang http://amaliarakhmania.wordpress.com http://orcid.org/0000-0002-6996-8496
Pramono, Sholeh Hadi
Jurusan Teknik Elektro, Universitas Brawijaya Malang
Kurniawan, Dwi Fadila
Jurusan Teknik Elektro, Universitas Brawijaya Malang
noise; performance; OFDMA; radio over fiber; wavelength
Amalia Eka Rakhmania, Sholeh Hadi Pramono, Dwi Fadila Kurniawan, in this paper explain that radio over Fiber (RoF) is a technology that integrates wireless and wireline transmission system to transmit radio signal through optical fibre cable. This paper evaluates the performance of Orthogonal Frequency Division Multiple Access (OFDMA) implemented in RoF system for mobile WiMAX network. RoF channel model includes both optical fiber with Relative Intensity Noise, shot noise, thermal noise, and chromatic dispersion, and also wireless channel with Additive White Gaussian Noise (AWGN). Through simulation, signal to noise ratio (SNR), channel capacity, bit rate, and bit error rate (BER) with the influence of optical fiber length and wavelength. Result shows that optical fiber length is proportional to SNR, channel capacity, and bit rate but inversely proportional to BER. 1550 nm wavelength has better channel capacity but lesser bit rate than 1310 nm.
Vocational School Diponegoro University
2019-10-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/25779
Gema Teknologi; Vol 20, No 3 (2019): April 2019 - October 2019
eng
Copyright (c) 2019 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/4713
2020-04-17T20:08:43Z
gema_teknologi:ART
2656-582X
0852-0232
dc
SIMULATOR GENERATOR HARMONIK
Sasmoko, Priyo
Program Diploma III Teknik Elektro
Fakultas Teknik Universitas Diponegoro
Priyo Sasmoko, in this paper explain that the need of electric power recently progressively complex, not only the requirement of availability of electricity, but the quality of energy have become prime facie demand. Studies of electricity quality have been conducted by many experts, one of them is about harmonic. Harmonic represent waving current or tension which is tension distortion at electric power system mains so that can result unideal waveform. The study of harmonic required appliance or obyek which need to be checked. In this research Simulator Generator Harmonik is made a harmonic generator module which can deputize the appliance or obyek yielding harmonic with harmonic component and the THD which can be varried. This module works by dividing one cycle of mains become some slots so it can be got harmonic component as desired. To change the THD,a variation of linear load is used so that the ratio of non-linear load current can be varried.
Keywords : Simulator, Harmonic component, THD
Vocational School Diponegoro University
2012-02-06 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/4713
Gema Teknologi; Vol 16, No 3 (2011): April 2011 - October 2011
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/32875
2020-11-12T22:08:11Z
gema_teknologi:ART
"201030 2020 eng "
2656-582X
0852-0232
dc
ANALISIS NILAI HAMBATAN TOTAL DENGAN PERUBAHAN SARAT KAPAL KM. KENDHAGA NUSANTARA 6
Utomo, Budi
Program Studi D3 Teknologi Perancangan dan Konstuksi Kapal, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro http://www.vokasi.undip.ac.id
Sulaiman, Sulaiman
Program Studi D3 Teknologi Perancangan dan Konstuksi Kapal, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro http://www.vokasi.undip.ac.id
Ship Resistance; Ship Draught; Km. Kendhaga Nusantara 6
The calculation of total resistance value is important of ship because affects the speed of fluid flow that occurs, as well as the speed of the ship.So that in the designing new ships, sea trials are needed to find out whatever the preparedness of the ship is planned. The purpose is to obtain the value of the total resistance and the coefficient of ship resistance KM. Kendhaga Nusantara 6 uses the calculation method for each ship draught/loading condition. The Method used is experimental method with numerical value approach, Denny Mumford theory and Froude's number. The results show that the largest Total Resistance (Rt) is 5646,02 kN, it was found when speed of ship was 12 knots and draught ship 3,5 meters, with a coefficient value (Ct) of 7,757 x 10-3. The difference in value (Ct) is 0,032x10-3 or 0.41%, and it is still in the criteria because it is below 5%.
Vocational School Diponegoro University
2020-11-11 15:02:23
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/32875
Gema Teknologi; Vol 21, No 1 (2020): April 2020 - October 2020
eng
Copyright (c) 2020 Gema Teknologi
oai:ojs.ejournal.undip.ac.id:article/8813
2020-04-17T20:10:04Z
gema_teknologi:ART
"141001 2014 eng "
2656-582X
0852-0232
dc
APLIKASI SMART CARD PADA METERAN AIR DIGITAL PRABAYAR BERBASIS ARDUINO MEGA 2560
Rafik, Adhila
PSD III Teknik Elektro
Yuniarto, Yuniarto
PSD III Teknik Elektro
Adhila Rafik, Yuniarto, in paper smart card application in prepaid digital water meter based on arduino mega 2560 explain that water is a daily necessity, to get a decent clean water to be used, we can use the services of the service taps to get water, but the post-pay payment method used taps raises its own problems, namely the problem of payment arrears. To resolve the issue of payment methods can be converted to a prepaid system, so the use of water dilakuakn after the user makes a payment in advance, many prepaid methods, one of which is the smart card is a plastic card in which there is a microcontroller chip that makes it possible to encrypt the data that there didalamya so not just anyone can read and menulisa data into the card, the use of smart cards as a payment method for a digital prepaid water meter taps, can overcome the problem of payment arrears. Because the use of RFID technology allows the User just close the smart card reader to its user.
Keywords: smart cards, prepaid, RFID
Vocational School Diponegoro University
2015-07-22 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8813
Gema Teknologi; Vol 18, No 1 (2014): April 2014 - October 2014
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8923
2020-04-17T20:11:19Z
gema_teknologi:ART
2656-582X
0852-0232
dc
SISTEM KEAMANAN RUMAH OTOMATIS MENGGUNAKAN SENSOR PIR, SENSOR SUHU, SENSOR GAS YANG TERHUBUNG DENGAN TELEPON SELULER BERBASIS MIKROKONTROLER ATMEGA8 DAN MIKROKONTROLER ATMEGA162 DENGAN BACKUP DAYA
Sekar A, Khanina Rizki
PSD III Teknik Elektro
Subali, Subali
PSD III Teknik Elektro
Khanina Rizki Sekar A, Subali, in paper Auto home security system using PIR sensor, temperature sensor, gas sensor connected with mobile phone based on microcontroller atmega162 and atmega8 with backup power explain that given the innumerable acts of criminality is happening around us, especially that threaten the security of residence so that the sense of security and peace becomes expensive. Along with the development of increasingly advanced technology make things easier including the automated home security systems are equipped with sensors, microcontrollers used as modem wavecom regulator as well as an information medium. Where in this system, every room in the house mounted sensor that functions to monitor the condition of the house. The sensor used is a PIR sensor for motion detection, temperature sensor to determine the room temperature and gas sensors to detect gas leaks. Results of the work detection sensor will be processed by a microcontroller ATmega8 then forwarded to the ATMega162 microcontroller via a serial port. Further information will be sent to the mobile phone via modem wavecom homeowners, so homeowners can know the condition of the house. The system is equipped with a battery backup, intended for home security control system to keep working in case of power outage suddenly.
Keywords: PIR Sensor, Temperature Sensor, Gas Sensor, Microcontroller, Battery Backup
Vocational School Diponegoro University
2015-08-04 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/gema_teknologi/article/view/8923
Gema Teknologi; Vol 17, No 2 (2013): October 2012 - April 2013
eng
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