The ZMPT101B is a single-phase Alternating Current (AC) voltage sensor module. This module includes an on-board voltage transformer which performs the function of galvanic isolation, supports up to 250 Vac input voltages and deliversthrough its output terminal an analog sine wave with adjustable amplitude by using the on-board potentiometer. This module could be used together with a current transformer to measure power consumption.Specifications:Input signal voltage: up to 250VACSupply Voltage: 3.3-5VOutput signal: 0-5VSize: 50 x 20mmDatasheet of transformerBoard Schematic