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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.
Arjuna Subject : -
Articles 140 Documents
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Pembuatan Alat Inspeksi Visual Jalur PCB Menggunakan Pengolahan Citra Untuk Kegiatan Praktikum Pengawatan Dan Teknologi PCB Rangga Ade Julianto; Efrizon Efrizon; Hendrick Hendrick; Laxsmy Devy; Suryadi Suryadi; Yul Antonisfia
Elektron : Jurnal Ilmiah Volume 14 Nomor 2 Tahun 2022
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.14.2.295

Abstract

PCBs are very influential on the manufacture of electronic devices, for example when there is even a small number of PCB paths that are cut off or damaged, the electronic device cannot be operated properly. Therefore, in this study, the author tried to create and analyze a defect checking tool on PCBs to replace human vision to make it easier and can save costs. This tool is equipped with the help of a Logitech c920 Webcam and a Raspberry Pi 3b+ microprocessor which is used to store and run programs that have been created on Python programming software, so this tool can be used portablely. With these two technologies, Image Processing can be used to detect objects with the OpenCv library and Google Colab. PCB defect detection tool with the help of Image Processing uses yolo convolutional neural network method to help determine path damage on the PCB. You Only Look Once (YOLO) algorithm with five detection classifications, namely short, open circuit, missing hole, mouse bite, and spur. From the results of the study, the results were obtained that the YOLO algorithm was able to detect these five classifications with a value of mAP@0.5 short 90.67%, open circuit 97.86%, Mouse Bite 94.43%, Missing Hole 96.09%, and spur 97.56%.
Studi Kelayakan Sistem Pentanahan pada Gedung Teknik Elektro Universitas Andalas Yudia Meka Seftiani; Novizon Novizon
Elektron : Jurnal Ilmiah Volume 14 Nomor 2 Tahun 2022
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.14.2.297

Abstract

The grounding system is one part of the electric power system that has an important role in flowing overcurrent from the electric power system to the ground due to electrical power system disturbances or lightning strikes that can endanger the building and its surroundings. This grounding system aims to protect humans, electrical equipment, and electrical installations from the danger of electrical short circuits. In compliance with official regulations, safety standards and according to general electrical installation regulatory standards (PUIL) to avoid the danger of lightning strikes in buildings, it is necessary to have grounding resistance value of less than five ohms and is made as small as possible. In this study, the measurement of grounding resistance seen from the depth of the grounding and the grounding resistance are arranged in parallel. The results of this study indicate that the parallel grounding resistance method produces a more significant reduction in the value of grounding resistance compared to the grounding resistance in a certain depth From the calculation results, the resistance value of the Electrical Engineering Building at Andalas University using a rod electrode with a diameter of 0.016 meters is 24.5 Ω with an electrode depth of 0.5 meters and at a depth of 1 meter a grounding value of 17.52 Ω is obtained. The deeper the depth of the electrode, the smaller the resulting resistance value, and installing a grounding system with the multirod method, namely arranging electrodes in parallel with a certain depth, obtains less resistance compared to not parallelizing the electrodes
Rancang Bangun Purwarupa Sistem Parkir Otomatis Menggunakan RFID dan Sensor IR Proximity Yahya Ega Masyarik; Danny Kurnianto; Nur Afifah Zen
Elektron : Jurnal Ilmiah Volume 14 Nomor 2 Tahun 2022
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.14.2.300

Abstract

Managers of universities have a responsibility to ensure that parking is available for all stakeholders, particularly students. When there is not enough parking space for the quantity of vehicles arriving, issues occur. Consequently, the atmosphere was no longer favorable due to the pandemonium of vehicles that had taken over. This research's objective is to create a working prototype of an vehicles parking system that can control the flow of vehicles into the campus area. This system's controller is a Wemos D1 Mini, which may be used with the ESP 8266 module to connect to the internet, RFID card for students' identities for drivers of motor vehicles, servo motors to control gateways, infrared proximity sensors to count the number of vehicless entering and exiting the parking area, and Google Firebase for student lecture scheduling databases are all examples of technology used in parking area today. The test results reveal that the system can successfully verify the schedule saved in Firebase and read the student's identity contained on the RFID card. Only students with class schedules on that day are permitted access to the parking area.
Optimalisasi Antena Mikrostrip Tiga Pita Untuk Penerapan Pada WLAN dan WiMAX Muhammad Aditya Aditya Nikhaldo; Ikhwana Elfitri
Elektron : Jurnal Ilmiah Volume 14 Nomor 2 Tahun 2022
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.14.2.302

Abstract

Wired WLAN (Wireless Local Area Network) technology emerged as the most widely used network. WLAN is suitable for those who need internet. By using WLAN will be found various advantages for its users. Likewise with WiMAX (Worldwide Interoperability for Microwave Access) wireless technology, WiMAX basically has a function similar to WLAN, but with certain small differences. WLAN can cover one local area, in contrast to WiMAX which can cover a metropolitan area of ​​up to 50km. Antenna is an integral part of WLAN and WiMAX. This paper discusses a three-band microstrip antenna optimized for WLAN and WIMAX technology. The antenna consists of two layers of FR4 (epoxy) printed circuit board (PCB) with a thickness (h) of 1.6 mm, a dielectric constant (εr) of 4.4, and a dielectric loss factor (tan) of 0.02 with dimensions of 35 mm × 48 × 1.6 mm . This antenna is simulated using CST software. The design of the Studio Suite 2018 antenna is done by adjusting the size of the slot spacing, the length of the slot, the size of the ground clearance, and the size of the board length. In this antenna design, the slot size can be increased on the left side of the patch to increase the slot pitch for a deeper return loss, and the right side of the patch to increase the slot pitch for a shorter return loss. The results in the simulation process obtained good working frequency, bandwidth and return loss, the antenna can operate at the expected frequencies, namely 2.4 GHz, 3.2 GHz, 5.1 GHz with a return loss of -42 dB, -44 dB, - 31 dB. Bandwidths 114.4 MHz, 121.2MHz and 287.9MHz.
Penerapan Hypertext Transfer Protocol Web Server untuk Over-The-Air Auto Update Firmware pada Perangkat IoT Iin Karmila Yusri; Kasim Kasim; Andi Muhammad Akbar
Elektron : Jurnal Ilmiah Volume 14 Nomor 2 Tahun 2022
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.14.2.298

Abstract

Devices in the IoT system are located in many places and difficult to be accesses physically by system administrator. Besides, short life cycle of software/firmware requires to be updated periodically in order to improve the embedded system function to meet the system requirements. These conditions shows the difficulty to update the devices physically. Auto update firmware over the air system became a solution for physical acsess and periodically updated problem which developed by implementing Hypertext Transfer Protocol Web Server. This research is part of study of developing IoT Management System in agricultural environment. This system is in form of web application as an interface to control and manage the update system and a software for update firmware that embedded in the IoT devices. The results shows that the system is able to update firmware of the IoT devices that connected to different network at the same time automatically. Besides, this system can serve around 29,000 request for firmware update concurrently.
Kontrol Nutrisi Tanaman Hidroponik Berbasis Monitoring Internet of Things Rouhillah Rouhillah; Inzar Salfikar; Maulidi Ichan
Elektron : Jurnal Ilmiah Volume 14 Nomor 2 Tahun 2022
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.14.2.306

Abstract

Hydroponics is a way of farming that does not use soil, but only uses water that contains nutrients. The growth of hydroponic plants can be influenced by various factors, one of which is a lack of water nutrition in hydroponic plants. Therefore, this study aims to create a system that functions to control water nutrition, as well as the availability of sufficient water in hydroponic reservoirs. This control process uses NodeMCU esp8266 and processes sensor data and then sends it to firebase which will be displayed to Android with Internet of Thing (IoT) technology. If the nutritional condition being monitored is reduced, this nutrition control device will receive input from the sensor to add nutrients automatically. The addition of nutrients uses an on-off control system, when the TDS sensor reads the water nutrients are reduced the nutrient pump will be on until it reaches the initial nutrient setpoint, then the nutrient pump will be off. The result of reading sensor data obtains the percentage error for the Total Dissolve Solid (TDS) sensor with a comparison of TDS meter of 5.746%.
Karakteristik Medan Listrik-Dekat Petir Positive Cloud to Ground Yudia Meka Seftiani; Ariadi Hazmi; Novizon Novizon; Akbar Abadi; Riza Widia
Elektron : Jurnal Ilmiah Volume 15 Nomor 1 Tahun 2023
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.15.1.334

Abstract

This study was conducted on 19 electric field data near positive lightning cloud to ground (+CG). The electric field change of +CG lightning consist of preliminary breakdown (PB) and return stroke (RS). The analysis conducted in this research are: PB/RS ratio, PB-RS separation, pre-return stroke duration, pulse train duration, and individual pulse duration. Furthermore, the relationship between +CG lightning and cloud image satellite was observed the average value of PB/RS ratio, PB-RS separation, prereturn stroke duration, pulse train duration and individual pulse duration were 13,89%, 91,53 ms, 102,23 ms, 1,20 ms,150,31 μs, respectively.
Prototype Sistem Monitoring Nutrisi dan Tingkat pH Air pada Budidaya Hidroponik Sayur Pakcoy Menggunakan Teknologi Internet of Things (IoT) Mafana Nur Hamidah; Nova Indah Safitri; Dimas Wira Akbar; Olivia Sherly Indah Uly; Danny Kurnianto
Elektron : Jurnal Ilmiah Volume 15 Nomor 1 Tahun 2023
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.15.1.336

Abstract

The agricultural industry is critical in supplying food and fiber demands, but there is a demand-supply imbalance due to decreased land availability. Hydroponic techniques can be utilized to alleviate agricultural land loss by using water as a growing medium. Farmers must constantly examine plant condition and harvesting schedules. The pH of the water and nutrients are important indications for hydroponic farmers to monitor. Therefore, the implementation of the Internet of Things (IoT) allows farmers to conduct real-time monitoring more easily and regularly. IoT is defined as a system that allows integrated hardware to communicate with the internet network. The IoT device is built by attaching a NodeMCU 8266 microcontroller to an adapter, which provides electrical voltage while also regulating a water pump that delivers nutrients and water to plants. The acquired data is then transmitted to the blynk program, allowing real-time monitoring of the results via a smartphone. The present research system's usefulness and performance are improved by including pH and TDS sensors. The average accuracy of pH monitoring utilizing a pH sensor and a manual pH meter was 92.09%. Meanwhile, the average accuracy of nutrient monitoring utilizing TDS sensors and a TDS meter was 73.19%.
Peramalan Beban Listrik Kabupaten Pesisir Selatan Dengan Analisis Regresi Zulka Hendri; Efendi Efendi; Junaidi Asrul; Fitriadi Fitriadi
Elektron : Jurnal Ilmiah Volume 15 Nomor 1 Tahun 2023
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.15.1.340

Abstract

The more electric vehicles emerge, the more electricity demand will increase in each region. This will encourage electricity providers to increase the number or capacity of generators. The construction of a new power plant requires load forecasting to determine how much capacity the plant will build. This study aims to predict the electrical load in Pesisir Selatan, West Sumatra until 2031 using linear regression analysis and time series. Forecasting is done on each sector of PLN customers. Forecasting is done based on the PLN customer sector. The forecasting sectors are the household, business, social and government sectors. The four test criteria were carried out are namely the coefficient of determination test (R2), the F test, the T test and the mean absolute percentage error (MAPE). The forecasting results show that in 2031 the electricity load for the household sector is 120.1 MW, the business sector is 5.7 MW, the social sector is 56.9 MW and the government is 9.5 MW.
Reduksi Harmonisa Pada Saluran Distribusi Tenaga Listrik Dengan Filter Daya Aktif Fitriadi .; M. Imran Hamid; Herisanjani Herisanjani; Firmansyah Firmansyah; Zulka Hendri
Elektron : Jurnal Ilmiah Volume 15 Nomor 1 Tahun 2023
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.15.1.350

Abstract

The large use of power converters in distribution lines causes poor power quality such as high produces harmonics in an electric power system that arises due to the operation of non-linear electrical equipment. The presence of harmonics in the power system distribution results in a very large loss in the system. In this paper had been done a simulation of power quality improvement through harmonic reduction using parallel active power filter. Active power filters work with control techniques based on the concept of instantaneous power to determine the amount of compensation currents that must be generated by the power compensator power circuit. The compensating current references generated by the control circuit are used by the hysteresis type controller to provide harmonic compensation arising. From the result of simulation using Simulink MATLAB, the harmonic value (THD) decrease caused by the 3 phase rectifier load on a distribution network which is used as case example. The harmonic value before compensated on the network is 27.85% at each phase, while after computing the harmonic value of the network decreases to 1,43% in R phase, 1,49% in S phase, and 1,34% in T phase.

Page 14 of 14 | Total Record : 140

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