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All Journal Buletin Ilmiah Sarjana Teknik Elektro Jurnal Ilmu Ekonomi, Pendidikan dan Teknik (IDENTIK) Journal of Science and Engineering
Daeng Rahmatullah
Universitas Negeri Surabaya
Religion Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering

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Rancang Bangun Sistem Proteksi Pengisian Daya Pada Sepeda Listrik Roda Tiga Vokasi Unesa Terintegrasi Panel Surya Yanuar Rahman; Ferly Isnomo Abdi; Warju Warju; Daeng Rahmatullah; Nur Vidia Laksmi B
Jurnal Ilmu Ekonomi, Pendidikan dan Teknik Vol. 3 No. 3 (2026): IDENTIK - Mei
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/identik.v3i3.1543

Abstract

The increasing use of electric bicycles as an environmentally friendly mode of transportation has created a growing need for safe and efficient battery charging systems. One of the main challenges in battery charging systems is the risk of overcharging and overtemperature, which can reduce battery performance and lifespan. This study aims to design and develop a charging protection system for the UNESA Vocational three-wheeled electric bicycle integrated with a solar panel using an ESP32-based Auto Cut-Off method. The developed system utilizes a PZEM-017 voltage sensor, DHT22 and PT100 temperature sensors, and a Solid State Relay (SSR) as an automatic power disconnection actuator. The research employed an experimental method consisting of system design, hardware assembly, functional testing, data collection, and result analysis. Testing was conducted using voltage variations of 54.4 V, 57.6 V, and 60 V for Over Voltage Protection (OVP), and temperature variations of 25°C, 40°C, and 50°C for Over Temperature Protection (OTP). The results indicate that the system successfully detected overcharge and overtemperature conditions and automatically disconnected the charging process according to the predefined set points. The sensor measurement error was found to be less than 1% compared to reference measuring instruments. Furthermore, the hybrid charging system integrating solar panels and grid electricity achieved a remaining battery capacity of 60%, which was higher than the 45% remaining capacity obtained from grid-only charging under the same operating conditions. Therefore, the developed protection system effectively improves battery charging safety while supporting the utilization of renewable energy in three-wheeled electric bicycles.
Sistem Kontrol Time Based Scheduling Menggunakan PLC Untuk Efisiensi Konsumsi Daya Listrik Pada Studio Musik. Gita Rolland Ibanez; Ayusta Lukita Wardani; Daeng Rahmatullah; As’ad Shidqy Aziz
Journal of Science and Engineering Vol. 2 No. 2 (2026)
Publisher : CV. Akira Java BUlu

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Abstract

Unscheduled electricity usage in music studios may lead to energy wastage due to electrical loads remaining switched on outside operating hours. This study aims to design and implement a Time-Based Scheduling system using an Omron Programmable Logic Controller (PLC) and a Haiwell Human–Machine Interface (HMI) to automate the operation of electrical loads according to predetermined schedules. The system is equipped with a PZEM sensor to monitor electrical parameters in real time and a capacitor to compensate reactive power and improve the power factor. the research method consisted of hardware and software design, system implementation, and performance testing. System performance was evaluated by comparing electricity consumption before and after the implementation of the Time-Based Scheduling system. In addition, the accuracy of the PZEM sensor was assessed by comparing its measurements with those obtained using a clamp meter. the results demonstrate that the system successfully controlled electrical loads automatically according to the predefined schedule. The PZEM sensor produced measurements that closely matched the reference instrument, with average deviations of 2.24 V for voltage and 0.0058 A for current. Electricity consumption decreased from 55 Wh to 52 Wh, resulting in an energy saving of 5.45%. Although the reduction in energy consumption was relatively modest, the proposed system improved operational discipline, reduced the potential for human error, and supported more efficient electricity management.
Sistem Monitoring dan Pembatas Stop Kontak Dengan Early Warning Berbasis Node-RED dan Telegram Muhammad Rizal Izzuddin; Aditya Chandra Hermawan; Mahendra Widyartono; Daeng Rahmatullah
Journal of Science and Engineering Vol. 2 No. 2 (2026)
Publisher : CV. Akira Java BUlu

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Abstract

Pada sebagian rumah kos lama, satu kWh meter dan satu MCB masih digunakan untuk beberapa kamar sehingga konsumsi energi setiap kamar sulit dipantau secara terpisah dan penggunaan arus pada satu kamar belum tentu mencapai karakteristik pemutusan MCB utama. Penelitian ini mengembangkan sistem pemantauan dan pembatas arus pada satu stop kontak lokal berbasis Internet of Things. Sistem menggunakan ESP32, sensor PZEM-004T, relai, LCD, keypad 4×4, Node-RED, Telegram, dan Google Spreadsheet. Peringatan dini diberikan ketika arus mencapai 90% dari batas yang diatur, sedangkan pemutusan dilakukan ketika arus lebih bertahan selama 2 detik. Batas arus dapat diatur pada rentang 0,50–3,00 A. Hasil pengujian menunjukkan rata-rata kesalahan pengukuran tegangan sebesar 0,07% dan arus sebesar 3,43%. Pada rentang arus 1,68–3,67 A, kesalahan pengukuran berada pada 0,00–1,19%. Waktu tunda internal ESP32 tercatat konsisten sebesar 2,00 detik, sedangkan waktu respons keseluruhan berada pada rentang 3,83–4,77 detik dengan rata-rata 4,26 detik. Sistem mampu beroperasi lebih dari 48 jam dan seluruh fungsi pemantauan serta kontrol melalui Telegram dan Node-RED berhasil pada jarak pengujian hingga 2,5 km. Hasil tersebut menunjukkan bahwa prototipe mampu menjalankan fungsi pemantauan, pembatasan, pencatatan energi, dan kontrol jarak jauh pada kondisi pengujian.
Performance Evaluation of a Rabbit Manure-Based Biogas Power System: Slurry Dynamics, Energy Yield, and Conversion Efficiency As'ad Shidqy Aziz; Deshinta Arrova Dewi; Daeng Rahmatullah; Muhammad ‘Izzuddin Al-Qassam; Ayusta Lukita Wardani; Fithrotul Irda Amaliah; Ridho Hendra Yoga Perdana; Onny Setyawati
Buletin Ilmiah Sarjana Teknik Elektro Vol. 8 No. 4 (2026): August
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v8i4.16870

Abstract

The increasing demand for sustainable energy has encouraged decentralized biogas-based power systems, yet a critical research gap remains regarding their field-scale integration and multi-parameter thermodynamic evaluations under real farming conditions. The research contribution is the field-scale operational integration and continuous performance evaluation of a 500 L rabbit manure biodigester coupled with a three-stage purification unit and a modified 1000 W generator set. Utilizing a transparent, reproducible mathematical framework, fresh rabbit manure was digested under a 37-day hydraulic retention time. Results revealed that the accumulated slurry occupied 35.5% of the biodigester volume, leaving 64.5% available as headspace for passive thermodynamic pressure management. The purified biogas successfully operated a 40 W barn lighting load for 12 h day⁻¹, generating a stable average electrical energy output of 0.485 kWh day⁻¹ and a specific energy yield of 0.202 kWh kg⁻¹ of fresh manure. The integrated system achieved a validated Specific Energy Consumption (SEC) value of 0.99 and an overall energy conversion efficiency of 64.7%. While this investigation is limited by its small-scale setup and a 31-day batch cycle, the practical implications demonstrate that this layout provides a viable, standalone template for circular waste management and rural energy independence, establishing an empirical baseline to motivate future automated or upscaled microgrid architectures.
Off-Grid Savonius Wind-Powered Street Lighting with Cascading Logic Moch. Nur Ramansyah; Reza Rahmadian; Daeng Rahmatullah; Alfarid Hendro Yuwono
Journal of Science and Engineering Vol. 2 No. 2 (2026)
Publisher : CV. Akira Java BUlu

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Abstract

This research addresses the limited electrical lighting on rice-field pathways in Munggugianti Village, Gresik, which creates safety risks for residents and farmers at night. The study aims to design and implement an off-grid wind-powered public street lighting system and evaluate its energy efficiency using a cascading control method. A quantitative experimental approach was applied using an ESP32 microcontroller, a four-blade Savonius wind turbine coupled to a 60 W DC generator, six HC-SR501 PIR sensors, and PZEM-017 electrical sensors. Electrical parameters were monitored in real time through ThingSpeak, while field measurements were conducted over 24-hour cycles for seven days. The system harvested energy under wind speeds from 0.9 to 4.2 m/s and achieved a peak charging power of 11.75 W. The ESP32 control successfully activated the lamps sequentially according to detected motion, with a reported precision of 100%. The cascading mode reduced the load from a peak of 62.04 W during full-on operation to 1.69–5.08 W and reached 0 W when no movement was detected late at night. These results indicate that integrating the Savonius turbine with intelligent cascading control can improve energy utilization in off-grid pathway lighting.
Co-Authors Aditya Chandra Hermawan Alfarid Hendro Yuwono As’ad Shidqy Aziz Ayusta Lukita Wardani Deshinta Arrova Dewi Ferly Isnomo Abdi Fithrotul Irda Amaliah Gita Rolland Ibanez Mahendra Widyartono Moch. Nur Ramansyah Muhammad Rizal Izzuddin Muhammad ‘Izzuddin Al-Qassam Nur Vidia Laksmi B Onny Setyawati Rahmadian, Reza Ridho Hendra Yoga Perdana WARJU Yanuar Rahman