Arduino-based Single Phase AC Voltage Measurement with Under Voltage Protection

Abstract: This project focuses on the development of an Arduino-based system for measuring single-phase AC voltage and providing under-voltage protection. The system uses a voltage sensor to monitor the AC voltage level and an Arduino microcontroller to process the data. When the voltage falls below a pre-set threshold, indicating under-voltage conditions, the system activates a relay to disconnect the load, preventing potential damage to connected equipment. The user can adjust the threshold voltage according to their requirements, providing flexibility in various applications. The system also includes realtime voltage monitoring, which can be displayed on an LCD screen for easy access. The combination of voltage measurement, undervoltage detection, and protection ensures that sensitive devices are safeguarded from potential electrical issues. This Arduinobased solution offers a cost-effective and reliable method for improving electrical safety and equipment longevity in residential and industrial settings