Mini AC Power Meter

Mini AC Power Meter

This PCB is a small AC power meter. I made it because I need to use it in a power supply that I'm building.

It can measure both current and voltage and the resolution is 16-bit. It is galvanically separated so it is safe to use it with anything else you want to connect it to.


There is a microprocessor on the PCB that calculates the true RMS values ​​for both current and voltage. There is a UART that can send the values ​​to a master computer. It can also communicate directly with an ordinary PC via a regular terminal program. The Baud rate is 2MBaud.

The PCB dimensions are 51 x 37 mm and it is hand soldered.

TL Tech 2016 - Mini AC Power Meter