AC voltage detector module

AC Voltage Detector Module The AC Voltage Detector Module is designed to detect the presence of AC voltage and provide a safe, isolated signal to a microcontroller such as Arduino, ESP32, or Raspberry Pi. It is suitable for AC mains monitoring, automation, alarm systems, and electrical safety projects. Key Features Detects AC voltage presence Electrical isolation between AC input and control circuit Suitable for Arduino, ESP32 and other microcontrollers Compact module for easy installation Useful for mains power monitoring and automation Simple input/output interface LED indicator for detection status *Specifications can vary between different versions of this commonly sold module. Please check the exact voltage range printed on your module before listing a specific AC input range. Applications AC mains presence detection Home automation Smart switches Power failure detection Electrical monitoring Relay control systems Arduino & ESP32 projects Industrial automation Safety and alarm systems Important Safety Note AC mains voltage is dangerous. Do not touch or modify the module while connected to mains power. Use proper insulation, enclosure, fusing, and qualified electrical installation practices.