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All Journal Jurnal Teknologi Elektro Jurnal Pengembangan Rekayasa dan Teknologi Elektrika JPKMI (Jurnal Pengabdian Kepada Masyarakat Indonesia) Journal of Community Empowerment
Derman, Derman
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Environmental Science Mechanical Engineering Public Health Social Sciences Transportation

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Pelatihan Pengukuran Menggunakan Alat Ukur Listrik bagi Siswa SMK Walisongo Semarang Erlinasari, Erlinasari; Jayati, Ari Endang; Derman, Derman
JPKMI (Jurnal Pengabdian Kepada Masyarakat Indonesia) Vol 5, No 2: Agustus (2024)
Publisher : ICSE (Institute of Computer Science and Engineering)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstrak: Kemampuan mengoperasikan alat ukur listrik menjadi esensial bagi siswa SMK jurusan Teknik Listrik untuk menunjang praktik di lapangan. Namun, keterbatasan pengetahuan dan pengalaman praktik di sekolah seringkali menjadi kendala. Pelatihan ini bertujuan untuk meningkatkan keterampilan dan pengetahuan siswa SMK Walisongo Semarang dalam mengoperasikan alat ukur listrik, khususnya multimeter, untuk mengukur besaran tegangan dan arus. Pelatihan dilaksanakan pada 7 Mei 2024 dengan 44 peserta dari kelas X. Kegiatan meliputi persiapan, penyampaian materi, praktik pengukuran, dan evaluasi. Pelatihan menunjukkan peningkatan keterampilan penggunaan alat ukur listrik peserta sebesar 88%. Peserta mampu mengoperasikan multimeter dengan baik dan memahami cara mengukur tegangan dan arus. Diharapkan pelatihan ini dapat meningkatkan kesiapan siswa dalam menghadapi praktik di lapangan dan menunjang pembelajaran di sekolah.Abstract: Operating electrical measuring instruments is essential for vocational school students majoring in electrical engineering to support their field practices. However, limited knowledge and practical experience at school often become an obstacle. This training aims to improve the skills and knowledge of SMK Walisongo Semarang students in operating electrical measuring instruments, especially multimeters, to measure voltage and current quantities. The training was conducted on May 7, 2024, with 44 participants from class X. The activities included preparation, material delivery, measurement practice, and evaluation. The training showed an 88% increase in participants' skills in using electrical measuring instruments. Participants were able to operate the multimeter properly and understand how to measure voltage and current. It is hoped that this training can improve students' readiness to face field practices and support learning at school.
Analisa AC Power Automatic Switch Module dengan Metode Dual Power PLN dan Panel Surya Sadewa, Ery; Hilal, Yusuf Nurul; Derman, Derman
Jurnal Teknologi Elektro Vol 15, No 2 (2024)
Publisher : Electrical Engineering, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jte.2024.v15i2.004

Abstract

Power outages can cause disruption of service continuity, especially in service activities in the trade, hospitality, hospital, and industrial sectors. Today the distribution of PLN's electrical energy often fails in distribution due to internal and external factors, to meet the need for continuity of electrical energy, other sources of electrical energy are needed so that if there is a power outage from PLN, consumers' needs for electrical energy are not disturbed. These sources of electrical energy are temporary to serve the electrical load in the utilization of PLN's electrical energy as the main energy source. ATS (Automatic Transfer switch) is a tool that functions to move connections between one electric voltage source and another voltage source automatically or can also be called Automatic COS (Change Over Switch), a one-phase ATS by getting more economical and easy results in maintenance. ATS in this tool can work well in the switching process manually or automatically. When PLN has an outage, there is a time delay of ± 7 seconds before the energy from the solar cell starts. This aims to keep the components from being damaged in the event of an outage.
Innovation of Hybrid Solar and Gas-Powered Maggot Dryer Machine as a Solution for Dry Feed Pinandita, Satria; Jayati, Ari Endang; Derman, Derman; Elawati, Nunung Eni; Ramadan, Bimastyaji Surya
Journal of Community Empowerment Vol. 5 No. 1 (2025): Journal of Community Empowerment
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jce.v5i1.19313

Abstract

Sugihmanik Village, a major tofu production center, produces substantial amounts of organic waste, particularly wastewater that contaminates local rivers and disrupts the surrounding ecosystem. A community service program has been developed to convert tofu waste sludge into maggot feed, followed by drying using a hybrid solar and gas-powered maggot drying machine. Initial activities involved program outreach and technical training on maggot cultivation and the drying process. A drying trial demonstrated that 200 grams of wet maggots were reduced to 114 grams within seven minutes. Monthly drying operations required only four 3-kg LPG cylinders, resulting in 81 kilograms of dry maggots and a potential monthly income of IDR 4.050.000. Environmental degradation caused by tofu waste has been significantly mitigated, while local economic productivity has improved. The drying machine enhances the commercial value of maggots as durable livestock feed. The initiative strengthens the operational sustainability of the Krida Manik Waste Bank and offers a scalable model for resource-based environmental solutions.
RANCANG BANGUN PAKAN IKAN OTOMATIS TENAGA SURYA BERBASIS PROGRAMMABLE LOGIC CONTROLLER Derman, Derman; Destyningtias, Budiani; Suprasetyo, Arif
Jurnal Pengembangan Rekayasa dan Teknologi Vol. 2 No. 2 (2018): November (2018)
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jprt.v14i2.1228

Abstract

Pemberian pakan merupakan salah satu hal penting untuk usaha budidaya ikan. Saat ini pemberian pakan umumnya masih tergantung pada sumber daya manusia yang bersifat manual. Oleh karena itu dirancang alat untuk memberi pakan ikan yang dapat bekerja secara otomatis berdasarkan waktu atau jadwal pemberian pakan dan takaran pakan. Pakan ikan otomatis ini menggunakan PLC (Programmable Logic Controller) yang merupakan pengontrol utama, Inverter sebagai pengubah tegangan DC ke AC dari panel surya ke charge controller, Panel surya sebagai pembangkit listrik yang diperoleh dari sinar matahari yang dilengkapi dengan charge controller dan aki sebagai penyimpan dan penyalur tegangan. Hasil Penelitian menunjukkan bahwa alat penjadwalan pakan ikan otomatis tenaga surya menggunakan PLC telah berfungsi dengan baik. Alat tersebut bekerja berdasarkan sistem penjadwalan yang telah di setting melalui software cx-one programmer ke PLC. Alat akan bekerja sesuai jadwal yang telah diatur yaitu jam 7 pagi dan jam 4 sore serta kapasitas pakan yang keluar sudah terencana yaitu 1 Menit 30 detik. Pada saat pengujian nilai rata-rata tegangan solar cell tanpa beban   adalah 38,69 Vdc, sedangkan pada posisi berbeban didapatkan 36,92 Vdc, nilai rata-rata arus solar cell tanpa beban   adalah 1,80 A, sedangkan pada posisi berbeban didapatkan 1,56 A. Nilai rata-rata daya solar cell tanpa beban   adalah 70,02 W, sedangkan pada posisi berbeban didapatkan 48,74 W dan juga pada inverter menghasilkan daya keluaran rata-rata adalah 201,43 W
PENGOPTIMALAN SEL ELEKTRODA (MAGNESIUM AIR BATTERY) PADA LAMPU EMERGENCY SEBAGAI SOLUSI ENERGI ALTERNATIF Lestari, Diah Aryati Puji; Derman, Derman
Jurnal Pengembangan Rekayasa dan Teknologi Vol. 4 No. 2 (2020): November (2020)
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jprt.v16i2.2996

Abstract

Pemerintah telah mulai melaksanakan pemadaman bergilir, dengan adanya pemadaman bergilir masyarakat menggunakan lilin untuk penerangan. Tetapi lilin kurang efektif digunakan karena lilin terbuat dari bahan parafin, dimana parafin merupakan senyawa hidrokarbon dan senyawa alkana. Lilin parafin yang kebanyakan digunakan masyarakat pada jaman sekarang ini merupakan zat yang terbuat dari hasil penyulingan minyak bumi, pada jaman sekarang ini juga dapat diperoleh dari hasil sintesis.Selain adanya pemadaman bergilir dan pengurangan penggunaan lilin. Ada hal lain yang mendorong adanya inovasi yaitu sebagian besar kebutuhan listrik menggunakan sumber energi minyak bumi. Sebagian besar kebutuhan listrik menggunakan sumber energi minyak bumi. Cadangan minyak bumi semakin menipis, sehingga harga bahan bakar minyak mengalami kenaikan. Untuk menghemat listrik dan minyak bumi diperlukan penggunaan lampu emergency. Lampu emergency memiliki daya listrik yang cukup lama, ia akan tetap menyala hingga lima jam. Pada penelitian ini dihasilkan pengoptimalan sel elektroda (magnesium air battery) pada lampu emergency paling besar didapatkan jika sel elektroda tersebut disusun secara seri sebanyak 4 sel yang menghasilkan tegangan dan arus listrik paling besar. Tegangan dan arus listrik masing-masing yang dihasilkan sel elektroda 4 sel ini adalah 3,982 volt dan 0,02667 ampere.    
MODEL SISTEM INFORMASI MONITORING PERKULIAHAN FAKULTAS TEKNIK UNIVERSITAS SEMARANG BERBASIS WEB Derman, Derman; Harmini, Harmini
Elektrika Vol. 10 No. 2 (2018): Oktober 2018
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (729.65 KB) | DOI: 10.26623/elektrika.v10i2.1260

Abstract

The development of Information Technology is increasingly demanding that Higher Education to provide information quickly to meet the needs of Information and Monitoring Course for Lecturers, Students and Admin staff. This study aims to design a Model Information System and Monitoring Course at the Faculty of Engineering, University of Semarang Web-based. Coverage includes lecture planning, lecturing, evaluation of lecturing, control of lecturing and improvement of lecture planning. This research produces an application of Information System and Monitoring model of lecturing which aims to facilitate and accelerate the preparation of time, room and course schedule and ease in monitoring the attendance status of lecturers in class either to students or other parties in real time without having to come to campus check board information . The contribution of this research results will greatly affect the application of science and technology for higher education institutions and to realize the development of Faculty of Engineering Semarang University as a leading Faculty in 2023. The method used is dynamic priorities method which prioritizes the process that has the highest priority and is able to respond to changes in the system environment operate. Modeling the system using XAMPP package in which integrated MySQL module for database purposes, PHP for management of information systems, and Apache for simulation purposes. The results showed the implementation of the application of Information Systems Monitoring System Lectures Faculty of Engineering, University of Semarang goes well.
Co-Authors Ari Endang Jayati Budiani Destyningtias Elawati, Nunung Eni Erlinasari, Erlinasari Harmini, Harmini Hilal, Yusuf Nurul Lestari, Diah Aryati Puji Ramadan, Bimastyaji Surya Satria Pinandita Suprasetyo, Arif Wrahatnala, Ery Sadewa Yudha