SISTEM KONTROL OTOMATIS LAMPU DENGAN PHOTODIODE MENGGUNAKAN RANGKAIAN KOMPARATOR IC UA741

Authors

  • Aulia Nurfauziah Teknologi Rekayasa Instrumentasi dan Kontrol, Politeknik Negeri Indramayu, Jawa Barat
  • Syahid Febrian Anwar Teknologi Rekayasa Instrumentasi dan Kontrol, Politeknik Negeri Indramayu, Jawa Barat
  • Ahmad Rizki Amiruddin Teknologi Rekayasa Instrumentasi dan Kontrol, Politeknik Negeri Indramayu, Jawa Barat
  • Asrila Teknologi Rekayasa Instrumentasi dan Kontrol, Politeknik Negeri Indramayu, Jawa Barat
  • Fauzan Amri Teknologi Rekayasa Instrumentasi dan Kontrol, Politeknik Negeri Indramayu, Jawa Barat
  • Rahajeng Kurnianingtyas Teknologi Rekayasa Instrumentasi dan Kontrol, Politeknik Negeri Indramayu, Jawa Barat

Keywords:

Photodiode sensor, IC UA741, comparator, automatic control, light intensity

Abstract

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.

Downloads

Published

2025-07-30

How to Cite

Nurfauziah, A., Febrian Anwar, S., Rizki Amiruddin, A., Asrila, Amri, F., & Kurnianingtyas, R. (2025). SISTEM KONTROL OTOMATIS LAMPU DENGAN PHOTODIODE MENGGUNAKAN RANGKAIAN KOMPARATOR IC UA741 . JURNAL REKAYASA ENERGI, 4(1), 1–8. Retrieved from https://jre.polindra.ac.id/index.php/jre/article/view/75