This is a simple but very useful module
which uses a potential divider to reduce an input voltage by a factor of
5. The Voltage Sensor Module 25V allows you to use the analog input of a
microcontroller to monitor voltages much higher than it capable of
sensing.For example with a 0-5V analog ..
Active Single Pase Voltage Transform Module AC Output Voltage Sensor ZMPT101BZMPT101B AC Voltage Sensor is the best for the purpose of the DIY project, where we need to measure the accurate AC voltage with a voltage transformer. This is an ideal choice to measure the AC voltage using Arduino/ESP8266..