https://jre.polindra.ac.id/index.php/jre <p>Jurnal Rekayasa Energi (JRE) merupakan jurnal ilmiah yang diterbitkan oleh Pusat Penelitian dan Pengabdian Masyarakat, Politeknik Negeri Indramayu. Jurnal ini berisi tulisan yang diangkat dari hasil penelitian dan kajian analisis di bidang rekayasa energi, meliputi energi baru terbarukan, konversi energi, manajemen dan audit energi, komputasi energi, sistem refrigerasi dan tata udara, hingga instrumentasi kontrol. Penulis karya ilmiah dalam jurnal ini berasal dari dosen dan peneliti dari berbagai lembaga/institusi pendidikan, penelitian, dan pengembangan. Jurnal ini diterbitkan 2 (dua) kali dalam satu tahun yaitu pada Bulan Juni dan November.</p> <p>Jurnal Rekayasa Energi (JRE) is a scientific journal published by Research and Community Service Center, Politeknik Negeri Indramayu. This journal contains articles based on research and analytical studies in the field of energy engineering, covering new renewable energy, energy conversion, energy management and auditing, energy computing, refrigeration systems and air conditioning, up to control instrumentation. The authors of scientific papers in this journal are lecturers and researches from various educational, research, and development institutions. This journal is published 2 (two) times a year, namely in June and November.</p> <p>e-ISSN: 2985-3443 (online), p-ISSN: 2985-3427 (print).</p> Politeknik Negeri Indramayu en-US JURNAL REKAYASA ENERGI 2985-3427 https://jre.polindra.ac.id/index.php/jre/article/view/75 <p><em>This research presents the design and implementation of an automatic lamp control system using a photodiode sensor and an IC UA741 comparator circuit. The aim is to develop a system capable of responding to changes in light intensity in real-time to control the ON/OFF state of the lamp. The method involves designing a light detection circuit with a photodiode, signal conditioning, and voltage comparison using the UA741 comparator. Experimental results show that the output voltage of the photodiode is directly proportional to the incident light intensity. During testing, a maximum voltage of 3.6 V was recorded when the photodiode was exposed to light from 5 LEDs, with the voltage decreasing as the number of light sources was reduced. The system successfully switches the lamp on automatically when the light intensity falls below a defined threshold and switches it off when the light exceeds this threshold. This design offers an energy-efficient lighting control system with simple architecture, low cost, and high responsiveness, making it suitable for household applications or small public areas.</em></p> Aulia Nurfauziah Syahid Febrian Anwar Ahmad Rizki Amiruddin Asrila Fauzan Amri Rahajeng Kurnianingtyas Copyright (c) 2025 JURNAL REKAYASA ENERGI 2025-07-30 2025-07-30 4 1 1 8