Tuesday, July 5, 2016

Whole House Energy Monitor - Part 2

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:

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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