WARNING: This design appears to be potentially dangerous. Utmost care should be taken, and ideally professional advice sought, before attempting to construct this item. Moderator (RW)
Yes, this is not safe, so do not build this if you dont understad the risks. I personally will run the Pi over WLAN, but that still doesnt take all the risks away. If broader interest for this "shield" I will fix a safer version, no problem. For now v1.0 is quick and dirty and focus is on power measurment capabilites and ADE7878A capabilites.
I made this module as a bolt on (shield) to RPI B+
Don't know how to edit this wiki so, bear with me before I get this under control.
I logged my energy before via an optical sensor to the meter supplied by the power company , but wanted to see this now on a phase level, that's why I developed this. The Optical sensor giving kWh aggregated will be kept for calibration and aggregated power. I log every minute to an mysql server and via another program I can draw curves for any period of time I have collected data for. This includes also a lot of other parameters like temperature etc.
It's using the Analog Devices ADE7878A for Polyphase Multifunction Energy Metering.
Schematic File:ADE7878A rpi.pdf