Monday, June 23, 2008

We have signal

After messing around for a while I am getting good results with my phototransistor design by using AC coupling and some opamp buffering and a gain stages. Next up is to see if my phototransistor gets saturated in full sunlight. To get around it, I might have to add some IR filtering. Shading the meter would be a good option, but I think the electric company might have issues with that...

Oh, if you are just tuning in, check out my power post to get some context. This is my device for optically reading the spinning disk on my electric power meter so that I can compute peak power demand and make an informed decision on changing my electricity rates.

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