See PDF on github page.
There are many aspects of this circuit that I have not verified yet, however it has been serving it's purpose so far.
The use for this board thus far was to monitor the temperature in my Aunt's basement because she had become sick last year and unable to live at home. I could see that the heater was working by current draw and that the temperature was above freezing. The board has remained in use all winter and worked flawlessly. Additionally I could see when someone was in the house because of the lights being turned on and off (this proved useful at one time because it provided the exact time of an incident).
I just got the go ahead to put this board in a heat treatment/annealing furnace and start collecting data in an industrial setting. What I am hoping to accomplish here is to be able to see when the heating coils or igniter begin to fail so that they can be replaced before causing down time or loss of product.
As the project progresses I plan on monitoring voltage to provide true power readings, as well as other sensors and control boards as necessary.
What I hope to provide for home use is a box that can be installed by an electrician and monitor power consumption and provide feedback for automation systems.