Testing the first batch of WHEM boards, I discovered a mistake in one of the traces. Out came the rotary tool, and I ground out two trace connections, and soldered in 2 jumpers. This will be corrected on the REV 2 boards. Two tools I would not be without are my WEN Rotary Tool and my Board Holder.
The parts call out is:
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R1 – 100k Ohm
R2, R3, R4, R6, R7, R9, R10 – 10k Ohm
R5, R8 – 44.2 Ohm
C1, C2, C3 – 10uf 16v
I_Sense_1 & I_Sense_2 – SCT016 120a / 40ma (one for each leg of your breaker box)
V_Sense – 9vac transformer
Order boards, parts, and finished assembly at http://arduinotronics.blogspot.com/2016/06/whole-house-energy-monitor.html
R4 isolated and jumpered
Correct V_Sense Schematic – R4 (bottom 10k)
Parts Kit
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