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Itron meter reading — 1

I'm going to build a datalogger for the electric meter attached to my house. It has an IR LED that flashes once for every watt-hour used. I hooked up my oscilloscope directly to an IR photodiode and this is what I saw. The primary pulse is about 10ms wide, but there's another signal in there that I'm curious about…

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Uploaded on September 1, 2009