Rancang Bangun Sistem Kendali Penerangan Lampu Otomatis pada Ruang Laboraturium

Abstract

The use of manually controlled lighting systems in laboratory rooms often leads to electrical energy waste due to user negligence in turning off lights when the room is unoccupied or when sufficient natural lighting is available. This study aims to design and implement an automatic lighting control system for laboratory rooms based on the Internet of Things (IoT) to improve energy efficiency. The system utilizes an ESP32 microcontroller as the main controller, a Light Dependent Resistor (LDR) sensor to detect ambient light conditions, an ultrasonic sensor to detect human presence, and an MLX90614 sensor for non-contact body temperature detection. A power supply unit is designed to provide stable voltage to ensure reliable system performance. Experimental results show that the power supply operates properly with an error rate below 1%. The lighting control system functions according to the designed logic with a 100% success rate, where the lights turn on only when the room is dark and human presence is detected. Temperature sensor testing shows a measurement difference of 0.1°C–0.2°C compared to a thermogun. These results indicate that the proposed system operates reliably and is suitable for implementation in laboratory environments.