Smart Automatic Power Source Switching and Monitoring System Using Arduino

This paper presents the design and implementation of a smart automatic power source switching and monitoring system based on Arduino technology. The system intelligently prioritizes and selects among grid, generator, and inverter sources, while also integrating photovoltaic (PV) input for efficient battery charging. To enhance operational safety, the design incorporates overvoltage and undervoltage protection mechanisms that safeguard connected equipment under abnormal conditions. A 20×4 Liquid Crystal Display (LCD) provides real-time monitoring of the active source, AC voltage, frequency, PV power, and battery status. The deployed methods for this study to develop an algorithm for detecting and optimizing changes in power supply and demands using Arduino microcontroller and Proteus for the entire system expected performance demonstration purposes in real life. Experimental validation confirms the system’s capability to perform reliable automatic switching, efficient fault detection and recovery, and effective renewable energy integration. The proposed system is cost-effective, scalable, and suitable for both residential and industrial applications in regions with unstable power supply.