The ZMPT101B AC Voltage Sensor Module is a high-precision voltage sensing module designed to measure single-phase AC voltage up to approximately 250 V. It uses a precision ZMPT101B transformer and onboard amplifier circuit to provide an isolated analog sine-wave output with a DC midpoint. The output amplitude can be adjusted using the onboard potentiometer, and the module operates from 5–30 V DC. Ideal for Arduino, ESP32, energy monitoring, power measurement, and AC voltage sensing applications.