This project shows you how to build a simple safe electricity energy monitor based on Arduino. It’s suit for measure how much electrical energy you use in your home.
This mains ac meter uses AC to AC power adapter to measure voltage and clip on CT sensor to measure mains current. It can calculate real power, apparent power, power factor, rms voltage, rms current. For display you can add LCD to the project or connect it to a computer or data logger for more advance analysis. This non-invasive AC meter is designed by Trystan Lea
Project Firmware, Schematic and Documentation