Design and Implementation of a Microcontroller-Based AC Current and Voltage Monitoring System
DOI:
https://doi.org/10.26740/inajet.v9n1.p13-19Keywords:
AC monitoring, current sensor, voltage sensor, ESP8266, industrial electrical maintenanceAbstract
Reliable monitoring of electrical parameters is essential to ensure safe and efficient operation of industrial power systems. In industrial environments, manual measurement of electrical parameters such as voltage and current is often time-consuming and lacks real-time capabilities, which may increase the risk of undetected overloads and equipment failure. This study presents the design and implementation of a microcontroller-based AC current and voltage monitoring system developed as part of an industrial internship program at PT Hume Sakti Indonesia, a precast concrete manufacturing company. The proposed system utilises an ESP8266 microcontroller as the main processing unit, combined with an SCT-013 current sensor and a ZMPT101B voltage sensor to measure AC electrical parameters in real time. The acquired sensor data are processed to obtain effective RMS values of current and voltage, which are then displayed on a 16×2 LCD module using I²C communication. The system is powered by a portable Li-ion battery supported by a charging and voltage regulation module. Experimental testing results demonstrate that the developed prototype is capable of measuring AC current and voltage reliably under different load conditions. The system provides stable readings, clear visualisation, and safe non-invasive measurement, making it suitable as a low-cost monitoring tool for electrical maintenance applications. The proposed system contributes to improving operational awareness, preventive maintenance, and electrical safety in industrial environments.
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