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Elektron Jurnal Ilmiah
Published by Politeknik Negeri Padang
ISSN : 20856989     EISSN : 26544733     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering
Elektron Jurnal Ilmiah (EJI) is a peer-reviewed journal which is published by Department of Electrical Engineering, Politeknik Negeri Padang. The ISSN number is 2085-6989. EJI published the first edition in 2009 and since 2014, EJI publishes in Juni and December. The scopes of the journal are: electrical power, telecommunication, control, electronic and robotics.
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Articles 7 Documents
 1 
Search results for , issue "Volume 12 Nomor 2 Tahun 2020" : 7 Documents clear
Analisis Paralelisasi Konverter Melalui Multi Input - Single Output Transformator Frekuensi Tinggi dengan MatLab Simulink Fitriadi Fitriadi; Valdi Rizki Yandri; Herisanjani Herisanjani
Elektron : Jurnal Ilmiah Volume 12 Nomor 2 Tahun 2020
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.12.2.162

Abstract

Two parallel converters DC/AC with isolated control can be applied by a high frequency transformer with a switching pattern. However, the switching pattern and control technique of the converter needs more research so the process of electrical energy distribution on the parallel output side can produce the optimum value. Furthermore, in this research, parallelization method is applied by utilizing two converters in high frequency transformer with multi input-single output capability controlled by Matlab/Simulink. The input side of transformer consists of two full bridge converters while secondary side represents the parallelization of output side. Two converters DC/AC is simulated by phase shifted full bridge (PSFB) of switching pattern and voltage mode control (VMC) technique. The distribution condition of optimum energy is investigated by observation of influences of ON condition duration of each switching period cycle on input converter to ON condition duration of secondary transformer terminal. The ON condition duration of each converter with switching PSFB is the condition depends on shifted/delay phase of signal on gate control. According to this simulation, optimum ON condition occurs when shifted/delay phase of each gate control signal converter is 135° (α1=α2=135°) and this condition is more efficient than phase of gate control signal is 45° (α1=α2=45°). The simulation results show that larger α of converters give the optimum distribution.
Sistem Otomatis Pompa Air dan Sabun pada Wastafel Pencuci Tangan Andrizal Andrizal; Yultrisna Yultrisna; Junaldi Junaldi; Tuti Anggraini; Anton Anton
Elektron : Jurnal Ilmiah Volume 12 Nomor 2 Tahun 2020
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.12.2.168

Abstract

Washing hands is an activity that should be routinely carried out by every individual, especially during the COVID-19 pandemic like today. There are many factors that make someone feel lazy and don't want to wash their hands, one of which is not wanting to be bothered by hand washing activities such as taking soap, turning the faucet and others. Experiments have been carried out in the form of testing the response of the sensor to detect the user's hand based on the distance and the reading angle. Furthermore, the ability to set the delay time for rubbing hands is tested to activate the water tap pump for rinsing. Based on the results of trials and analyzes carried out, the sensor response is obtained at a minimum distance of 4 cm and a maximum distance of 140 cm with a view or response area of 1100 horizontal positions and 850 in the vertical position. The water pump and soap pump are active for 3 seconds when the user's hand is detected by the sensor approaching the end of the water tap. The water tap pump comes back on after being delayed for 23 seconds, and the system is able to operate 100% automatically. Thus the minimum time for users to rub their hands for 20 seconds according to health standard protocols can be met.
Rancang Bangun Generator PWM Berbasis Mikrokontroler AVR ATmega Firdaus firdaus; Rivanol Chadri; Nasrullah Nasrullah
Elektron : Jurnal Ilmiah Volume 12 Nomor 2 Tahun 2020
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.12.2.171

Abstract

PWM is widely used in the fields of automatic control, power electronics and cellular communications. Previous research designed a PWM generator using the OMAP-L138 chip to produce a simple, high-precision, flexible and portable circuit. Another generator uses a single board computer FEZ Panda III and an Arduino board for power inverters. While the FPGA Spartan 3 is also used to generate PWM signals that can vary the duty cycle. In this paper, the PWM signal generator is made using the AVR ATmega8535 microcontroller where the frequency parameters and the output signal duty cycle can be adjusted via the keypad. The signal is tested using a measuring instrument for its accuracy. The ATmega AVR microcontroller family has a timer / counter with one of its operating modes, namely fast PWM. In order to change the frequency and duty cycle as desired, the ICR register is used to store the TOP value and the OCR register for the MAX value. The OCR value determine the duty cycle and the ICR value specify the frequency. The results are the higher the PWM frequency, the greater the value of the measured and desired frequency difference, this is because the large frequency makes ICR register value becomes small even though the frequency divider at minimum value. The difference between measurements and calculations on the Duty Cycle gives the result under 1%. This difference also occurs due to the rounding of the ICR and OCR values, but at a frequency of 20 kHz and a 25% Duty Cycle where the ICR value is 599 and OCR is 116 resulting in the minimum difference in frequency and Duty Cycle. From the experiments that have been carried out, the design of the PWM generator based on the AVR ATmega microcontroller has been successfully realized
Aplikasi Monitoring Air Pada Water Torn Secara Otomatis Berbasis Android dan Di Dukung Oleh Mikrokontroller Dwiny Meidelfi; Andre Febrian Kasmar; Fanni Sukma; Anggie Meyfrian Pratama
Elektron : Jurnal Ilmiah Volume 12 Nomor 2 Tahun 2020
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.12.2.174

Abstract

Control and monitoring of water in a tank is a computer instrumentation needed in industry. This research discusses a water monitoring application in water torn automatically based on android and supported by a microcontroller. One of the developing technology fields is microcontroller technology. In designing this device, it uses a NodeMCU microcontroller as a data processor and an ultrasonic sensor as data input as well as a buzzer and servo. An ultrasonic sensor is a device that can measure the distance of an object by utilizing reflected ultrasonic waves. This water monitoring uses firebase as a database to store data. To display measurement data, the interface is also designed using the Android Studio application software in the form of graphs, pump status, and water notifications. The test results show that the ultrasonic sensor used is able to measure water levels from 2 cm to 20 cm with an average measurement error of 4.93%. Water monitoring is designed to be able to produce a system output response according to the reference value given. In addition, water level monitoring can be displayed on the Android software interactively
Pemanfaatan Data Mining dalam Penentuan Rekomendasi Mustahik (Penerima Zakat) Andi Abdul malik Ahmad; Zawiyah Saharuna; Muhammad Fajri Raharjo
Elektron : Jurnal Ilmiah Volume 12 Nomor 2 Tahun 2020
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.12.2.182

Abstract

This study applies data mining in determining recommendations for mustahik. The application is carried out using a classification method with an artificial neural network algorithm where the attributes used are age and type of work of the head of the family, the condition and ownership of the residence, the place of sewage, family monthly income, number of dependents, and diet. Tests are carried out using a combination of values ​​between learning rate, epoch, k-fold, and hidden layer neurons. Based on the test results from the classification process, it is found that the artificial neural network algorithm has the highest accuracy when the number of hidden layer neurons is six, the learning rate is one, the fold is seven, and the number of epochs is 200, which is 92.09%. The test results are then displayed on the Mustahik information system page.
Efektivitas Vertical Screw Sebagai Feeder Mangkuk Kotor Pada Mesin Pencuci Mangkuk Ototmatis Edilla Edilla; Hendriko Hendriko; Daud Suherman
Elektron : Jurnal Ilmiah Volume 12 Nomor 2 Tahun 2020
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.12.2.184

Abstract

The bowl feeder is a tool feeder for the process of separating the bowls one by one from the stack arranged vertically and then the bowl will cross the conveyor. Some industries have created screw and pneumatic methods for feeding plastic bowl. However, the existing type of bowl beside plastics there are also ceramics. Ceramic bowl are widely used for culinary. In this final project a bowl feeder device has been made where the process is by placing a dirty bowl in the container so that the bowl will pass one by one to 4 screws which are driven by a dc torque motor which functions for the separation process from the stack. Next, after the bowl reaches the conveyor, it will cross to get to the washing process which is driven by a dc torque motor. The feeder speed can be adjusted using pulse width modulation so it can have variations of speed in the feeder bowl process to get to the washing process. This feeder is able to feed 1411,7 bowl per hour using combination speed of 80 rpm screw motor and 135 rpm conveyor motor.
Perancangan Aplikasi Chatbot Sebagai Media E-Learning Bagi Siswa Muhammad Alifyan Zulkarnain; Muhammad Fajri Raharjo; Meylanie Olivya
Elektron : Jurnal Ilmiah Volume 12 Nomor 2 Tahun 2020
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.12.2.188

Abstract

The conventional question and answer method has limited time, space and level of understanding from each student so that it becomes an obstacle to the ineffective teaching and learning process. Global pandemic events that have a negative impact on the education sector. So that the teaching and learning process is temporarily stopped at school and diverted online. This study aims to produce a chatbot application as a media for distance learning that helps the teaching and learning process of teachers and students . In practice, This research uses telegram as a chatbot media. The method used for data collection is by interview, literature study, and observation. Testing will be carried out with a black box, calculation of accuracy, and a user acceptance test in the form of distributing questionnaires. The results of this study produce a Chatbot Application as an E-Learning Media for Students that can help teachers in providing distance learning to students efficiently and easily.

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