I found this thread after pondering how to regulate the fan for my hot-air solar collector. Given that I'm trying to make it from my junk pile, I'm thinking of making a big bi-metallic strip by riveting brass and steel together, and using it to control a microswitch. The operating range can be set by distance along the strip, and the temperature by proximity to the strip, na? Any better ideas? Could I just use a refrigerator thermostat, and adjust the heck out of it? Or how about the thermostat from an electric heater with the on-off reversed?
|