Quote:
Originally Posted by mejunkhound
Anyone played with building an electronic txv using surplus regular bulb txv?
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Brad_C (from Australia) did some interesting stuff with one he salvaged from a scrap unit. He controlled it with a PIC controller, and wrote a sort of fuzzy logic algorithm to control it.
There was another Aussie, who posted on the 'Manifesto' quite a while ago, who was intending to use a stepper motor to directly dial the valve. Don't know how far he got.
But I think your idea sounds pretty good. There might be an energy-loss issue from the heater, but I couldn't begin to estimate what it could be.
-AC