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All Journal Bulletin of Electrical Engineering and Informatics Jurnal EECCIS Jurnal Informatika dan Teknik Elektro Terapan PROtek : Jurnal Ilmiah Teknik Elektro Electro Luceat Jurnal Informatika Universitas Pamulang Journal of Renewable Energy and Mechanics EPIC : Journal of Electrical Power, Instrumentation and Control Jurnal Saintika Unpam : Jurnal Sains dan Matematika Unpam Jurnal Teknik Elektro Uniba (JTE Uniba) Indonesian Journal of Electrical Engineering and Computer Science Abdi Laksana : Jurnal Pengabdian Kepada Masyarakat Community Development Journal: Jurnal Pengabdian Masyarakat Reswara: Jurnal Pengabdian Kepada Masyarakat Journal of Electrical Power Control and Automation (JEPCA) Jurnal Pengabdian kepada Masyarakat Nusantara REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Electrices : Jurnal Otomasi Kelistrikan dan Energi Terbarukan Abdimisi Andalasian International Journal of Applied Science, Engineering, and Technology PENGABDIAN SOSIAL KOMMAS: Jurnal Pengabdian Kepada Masyarakat CONSEN: Indonesian Journal of Community Services and Engagement Electrician : Jurnal Rekayasa dan Teknologi Elektro Biner : Jurnal Ilmu Komputer, Teknik dan Multimedia OKTAL : Jurnal Ilmu Komputer dan Sains AMMA : Jurnal Pengabdian Masyarakat Scientica: Jurnal Ilmiah Sains dan Teknologi GEMBIRA (Pengabdian Kepada Masyarakat)
Ojak Abdul Rozak
Universitas Pamulang
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PERANCANGAN MODUL SOFT START DENGAN POWER METER INDIKATOR BERBASIS ARDUINO DAN PZEM-004T UNTUK INDUSTRI RUMAH TANGGA Irsyad Hadi Rahmanto; Ojak Abdul Rozak
Electro Luceat Vol 11 No 2 (2025): Vol. 11 No. 2 (2025) : Electro Luceat (JEC) November - 2025
Publisher : LPPM Poltek ST Paul

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/8q64qb77

Abstract

Electricity is a basic necessity at the household level. Households tend to overlook factors that cause power surges, such as the use of electrical loads that incrush current when turned on. One device that can reduce a incrush current during start-up is softstart. The purpose of this design and testing is to reduce current during the startup of electrical loads and to determine the values of current and electrical energy efficiency before and after the use of the softstart module in real time. The method is design softstart module and powermeter indicator based on Arduino and PZEM-004T. The results show that the voltage at the softstart module output is still within PLN tolerance standards. The voltage and current in test using module for resistive and inductive loads are lower and have an efficiency value of 95% for resistive loads and 94% for inductive loads. The incrush current in both loads increases gradually with a small current value. The conclusion of the study is that the softstart module can reduce starting incrush currents, power consumption, and has good efficiency values. The design of measurement device based on Arduino Uno and the PZEM-004T sensor produced accurate voltage and current measurements.
Development Of A Transformer Oil Temperature And Pressure Monitoring System Using SCADA Labview With Blynk Interface jauza, aura; Rozak , Ojak Abdul
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 20 No. 2 (2026)
Publisher : Faculty of Engineering, Universitas Brawijaya

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Abstract

The increasing demand for electrical energy, driven by industrial growth and technological advancements, has made transformers critical components in power distribution systems, essential for maintaining supply quality. While transformers function to regulate voltage levels, they are susceptible to heat generation from current flow, making temperature monitoring crucial (must remain below 85°C per IEC 60076-2 standard) to prevent failures. This study aims to develop a real-time monitoring system for transformer oil temperature and pressure using SCADA LabVIEW integrated with a Blynk interface. The system employs 4-20mA temperature and pressure transmitters, a Modbus JY-DAM0222 module, a Modbus HF2211 gateway, and an ESP32 microcontroller for data acquisition and transmission. Test results demonstrate high system accuracy with average measurement errors of 0.11% for temperature and 0.02% for pressure. The LabVIEW-Blynk integration enables remote monitoring via mobile devices, allowing early detection of potential transformer faults. This system provides an effective solution to enhance transformer operational reliability in power distribution networks.
IMPLEMENTASI SISTEM KENDALI PENERANGAN BERSUMBER ENERGI PHOTOVOLTAIK DI DARUL AYTAM AL-MUSTAFA GUNUNG SINDUR BOGOR Rini Astuti; Edwar Muallim; Ojak Abdul Rozak
Jurnal Gembira: Pengabdian Kepada Masyarakat Vol 3 No 06 (2025): DESEMBER 2025
Publisher : Media Inovasi Pendidikan dan Publikasi

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Abstract

Instalasi kelistrikan tidak tertata dengan baik beresiko kebakaran akibat korsleting dan menyebabkan biaya listrik mahal. Masalah ini berdampak terhadap keamanan dan keberlangsungan operasional. PkM ini bertujuan untuk menambah sumber energi alternatif bersumber photovoltaik dilengkapi pewaktu pada penerangan lapangan dalam meningkatkan kenyamanan kegiatan santri. Diterapkan metode analisis kebutuhan, pemilihan bahan standar, pemasangan instalasi, pengujian dan evaluasi dengan melibatkan santri. Hasil menunjukkan peningkatan signifikan dalam aspek tata kelola instalasi dan mengurangi risiko kebakaran akibat korsleting. Partisipasi santri menjadi faktor kunci keberhasilan yang menciptakan rasa memiliki dan kesadaran akan pentingnya keamanan instalasi listrik. Selanjutnya diperlukan pemeliharaan rutin instalasi dan edukasi berkala. Kegiatan ini menunjukkan kontribusi nyata dalam pemberdayaan masyarakat melalui pendekatan inovatif dan berkelanjutan.
Experimental Study of Sea Wave Power Plant with Mechanical Buoying System Juhana; Abdul Rozak, Ojak; Citra Dewa, Digo
Journal of Renewable Energy and Mechanics Vol. 5 No. 02 (2022): REM VOL 5 NO 02 2022
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2022.10196

Abstract

The need for electrical energy in Indonesia continues to increase, triggering an electrical energy crisis due to the increasing number of consumers of electrical energy which has an impact on the reduction of non-renewable fossil energy sources. Alternative energy sourced from new and renewable energy is needed, the use of electric generators from ocean wave energy in coastal areas needs to be empowered to be used as electrical energy that is useful for the community. This ocean wave power plant consists of: generator, power storage and voltage riser. A fixed magnetic generator connected to the buoy ball, the kinetic energy and potential energy of the ocean waves move the buoy ball so that the generator can rotate and produce electrical energy. This system can be used as a 12 V direct current (DC) battery charger as a backup energy supply and then increased to 220 V alternating current (AC) using an inverter. The average result of generator rotation is 182.34 ratio per minute (RPM). The average voltage generated by the generator is 12.53 V and the average current is 1.06 A and the output voltage of the inverter is 217 V when the load is 100 W.
Analysis The Effect of Solar Radiation on The Efficiency of PV Plant 50 kWp Rooftop UNPAM Viktor Abdul Rozak, Ojak; Tri Mulyadi, Rohmat; Nurfadilah, Hafidz
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.12181

Abstract

The potential for solar energy in indonesia which is a tropical country is very large with an insolation of around 4.5 Kwh/m2/day. Solar energy in the form of radiation waves will affect the power generated by solar panels and the efficiency of solar panels in generating power. This study was conducted at PV plant pamulang university which has a total of 108 panels with 6 strings and 18 panels in each string. The data in this study were taken per string to see the difference of efficiency in each string. The main problem of this study is to find out how much power and efficiency generated by PV plant against solar radiation. The purpose of this study is to understand and analyze the effect of solar radiation on power and efficiency. The method used is a quantitative descriptive method using a seaward irradiance meter to measure the average daily radiation per string and isolarcloud software to retrieve data from the voltage and current per string. The data taken is then calculated using a formula and then described using tables. Study shows that heat from the weather will result in decreased efficiency and the results of the analysis for a day the average value of radiation is 544.19 w/m2, the average power is 4227.79 watt and the resulting average efficiency is 18.57%.
Pengaruh Penyambungan PLTMH Terhadap Tegangan Jatuh pada Penyulang BBLA Anto Carmanto; Ojak Abdul Rozak; Yusup Muhammad Syakir
OKTAL : Jurnal Ilmu Komputer dan Sains Vol 4 No 08 (2025): OKTAL : Jurnal Ilmu Komputer Dan Sains
Publisher : CV. Multi Kreasi Media

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Abstract

Micro hydro power plants (PLTMH) are environmentally friendly alternative plants at PT. PLN ULP Pamempeuk has one of the feeders that is synchronized with PLTMH to increase power to the feeder. In some of these channels, there is a voltage drop that exceeds the standard limit of SPLN number 73 in 1987, it was 5%. In this thesis, a calculation was made of the magnitude of the voltage drop before and after it was interconnected with the PLTMH. From the calculation results before being interconnected with the PLTMH, there were four substations that experienced voltage drops, namely Substation WNGC-1018 by 6.585%, BOJ-441 by 5.825%, SUK-024 by 6.815%, and TLL-882 by 6.110%. To reduce the voltage drop, in addition to being synchronized with PLTMH, PLN also added two substations, namely the CPKP–999 substation with a transformer capacity of 100 kVA to reduce the voltage drop at the WNGC–1018 substation to 2.514%, then the KCU-808 substation with a transformer capacity of 100kVA to reduce the voltage drop at the SUK-024 substation to 4.284%. Then, the results of the calculation after being interconnected with the PLTMH, there are two substations that are still experiencing voltage drops, namely 1,272,076 volts with a percentage of 6.360% at substation B0J - 441 and 1,243,193 Volts with a percentage of 6.215% at substation TTL-882. Then, the repair solution that is carried out is to relocate the substation location. The substations that have changed locations are BOJ substation – 441 from 22,900 kms to 11,484 and TLL-882 substation from 23,650 kms to 9,802 kms. This location change reduces the voltage drop in the two substations, where previously the BOJ-441 substation had a voltage drop to 319.856 volts with a percentage decrease from 6.360% to 1.599% and in the TLL-882 substation, the voltage fell to 213.533 volts with a percentage decrease from 6.215% to 1.067%.
Implementation of Classroom Audio System to Increase Learning Effectiveness at Khazanah Kebajikan Vocational School : Implementasi Sistem Audio Ruang Kelas untuk Meningkatkan Efektivitas Pembelajaran di SMK Khazanah Kebajikan Muhammad Wahyu Taqwana; Ryan Aryadi; Oki Supriyadi; Ojak Abdul Rozak
CONSEN: Indonesian Journal of Community Services and Engagement Vol. 5 No. 2 (2025): Consen: Indonesian Journal of Community Services and Engagement
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/consen.v5i2.2346

Abstract

The availability of an adequate audio system is an important component in supporting the effectiveness of communication and learning in schools. SMK Khazanah Kebajikan is still facing limited audio facilities so that the sound of announcements and material delivery is not heard evenly in the classroom. This Community Service activity aims to improve the quality of communication and the teaching-learning process through the installation of a standardized classroom audio system. The stages of the activity include needs and permitting surveys, site reviews, preparation of tools and materials, participant training, device installation, sound quality testing, and overall evaluation. The installation was carried out by Electrical Engineering students of Pamulang University as a form of application of knowledge and collaboration with the school. The test results showed a significant improvement in sound quality, characterized by more even audio distribution, clearer voice, and improved communication comfort in learning activities. The evaluation of the activity also showed an increase in participants' understanding from 40% to 80% after participating in the installation training. This program has a direct impact in the form of increasing the efficiency of school communication while increasing student competence in the practice of audio system installation. This activity is expected to be sustainable and can be replicated in other schools to support the improvement of the quality of educational facilities.
Efficiency and performance ratio of photovoltaics on a 50 kWp Universitas Pamulang Viktor rooftop solar power plant Ojak Abdul Rozak; Aripin Triyanto; Heri Kusnadi
Bulletin of Electrical Engineering and Informatics Vol 13, No 1: February 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v13i1.5557

Abstract

To overcome the fossil energy crisis due to the increasing need for electrical energy, new renewable energy sources are needed. Due to technological developments in the fields of transportation, industry, household, and commercial use. Indonesia’s geography has the potential to apply new renewable energy, more specifically photovoltaic (PV). However, it is greatly influenced by environmental factors such as solar radiation, voltage, which have an impact on the output power efficiency and performance. So, it is necessary to test both measurements and calculations to see the optimization of output power and PV efficiency. From previous research, it has not been carried out, especially in the experimental method Universitas Pamulang: measurement and empirical and for a sufficiently high capacity with the aim of optimal output power. Methods of measuring sunlight intensity, voltage and current, the calculation of converting sunlight intensity to solar constellation, power, efficiency, and performance ratio (PR). The average value being 721 W/m2 an efficiency value of 19.9% and a value PR is obtained of 0.967 or 96.7% is still realistic. So that the system is declared optimal.
Implementasi Monitoring pH Berbasis IoT-PLTS pada Pembenihan Ikan Yogi Priyo Istiyono; Ojak Abdul Rozak; Bintang Pamungkas; Risna Dianiti Arifin; Muhammad Rizqi; Puad Bagas Sanjaya
Jurnal Pengabdian kepada Masyarakat Nusantara Vol. 7 No. 2 (2026): Edisi Mei - Agustus
Publisher : Lembaga Dongan Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/jpkmn.v7i2.9303

Abstract

Pemantauan pH di UPTD Budidaya Benih Ikan Bojongsari masih dilakukan secara manual dan berkala. Hasil observasi awal menunjukkan belum tersedia sensor permanen, dashboard jarak jauh, pencatatan otomatis, maupun sumber energi PLTS. Kegiatan Pengabdian kepada Masyarakat ini bertujuan mengimplementasikan sistem monitoring pH berbasis Internet of Things (IoT) yang didukung Pembangkit Listrik Tenaga Surya (PLTS). Metode kegiatan meliputi survei kebutuhan, perancangan, perakitan, pemrograman ESP32, instalasi, pengujian fungsional, pelatihan, dan evaluasi mitra. Sistem mengintegrasikan sensor pH, suhu, dan TDS dengan LCD dan dashboard web. Hasil uji menunjukkan seluruh fungsi utama yang diuji dapat bekerja; tegangan panel surya terukur 17,32 V, tegangan baterai 12,01 V, dan keluaran sistem 12,14 V. Dashboard menampilkan suhu 24,3 °C, pH 9,3, dan TDS 65 ppm; nilai pH tersebut kemudian diklasifikasikan sebagai kondisi basa/tidak normal. Evaluasi delapan butir oleh satu perwakilan mitra menghasilkan skor rata-rata 4,25 dari skala 5, dengan 75% butir berkategori puas dan 25% sangat puas. Karena kegiatan belum menggunakan pre-test-post-test, kalibrasi pembanding jangka panjang, dan evaluasi biologis, hasil ini ditafsirkan sebagai keberhasilan implementasi fungsional dan penerimaan awal mitra, bukan bukti peningkatan kompetensi atau kelangsungan hidup benih ikan.
Co-Authors A. Triyanto Abdul Hakim, Fikri Aditya Aditya Agus Ardianto, Donie Ahmad Faisal Mohamad Ayob Ahmad Solihin Aliashim Albani Anto Carmanto Arif Falah Ariyawan Sunardi Awaluddin Saputra Barru Arrosyid Bintang Pamungkas Bobik Setiawan Carmanto, Anto Citra Dewa, Digo Didit Maulana Digo Citra Dewa Donie Agus Ardianto Edwar Muallim Elfirza Rosiana Erik Agustian Yulanda Fajar Wahyu Saputra Fajar, Kurnia Galuh Ika Pratama Putri Hafidh Arief, Muhamad Hafidz Nurfadilah Hafiz Nabil Nurwahid Hedy Aditya Baskhara Hedy Aditya Baskhara Ikhsan Priyambudi, Ghani Irsyad Hadi Rahmanto Irvan Irvan J. Setiawan Jamal A. Rachman Saprin Jan Setiawan Januarianto, Teren jauza, aura Juhana Juhana Juhana Juhana Karsun Karsun Kiswanta Kiswanta Kiswanto Kiswanto Kusnadi, Heri Marfin Marfin Marfin Mohd Zamri Ibrahim Muhamad Zalani Daud Muhammad Rizqi Muhammad Wahyu Taqwana Muhammad Zulfiqar Ramadhan Nurhadi Nurfadilah, Hafidz Nurkahfi Irwansyah Nurkahfi Irwansyah Oki Supriyadi Oky Supriadi Pamungkas, Yoga Adi Pranoto Budi Laksono Pratama Putri, Galuh Ika Puad Bagas Sanjaya Putra Sidiq, Arya Raynaldi Cristian Rendra Sasmita Rifqi Muwaffiq Rini Astuti Risna Dianiti Arifin Rohmat Tri Mulyadi Ronaldo Sinaga Ryan Aryadi Saputra, Awaluddin Seflahir Dinata Suminto Suminto Sunardi Sunardi Supriyadi, Jajang Syaiful Bakhri Taufik Prasetio Toto Raharjo Toto Raharjo Tri Mulyadi, Rohmat Triyanto, Aripin W. A. Nurtiyanto Woro Agus N. Woro Agus Nurtiyanto Woro Agus Nurtiyanto4 Yogi Priyo Istiyono Yoyok Dwi Setyo P Yusup Muhammad Syakir Yuwono, Fajar