How do those optical flame sensors work? Applying voltage to it and changing resistance when it sees a flame or does it produce voltage when it sees a flame. I like the idea but don't know how to work it into a useful circuit.
The water heater is in tandem with a woodburner so the pump operation is independent of the burner on the waterheater. The water heater is to take up the slack when I am not home or its really cold out. Would like to get an idea of how much it runs in a day.
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Today's Featured Article - Talk of the Town: Removin Broken Bolts - by Staff. Another great discussion from the Tool Talk Discussion Forum. The discussion started out with the following post: " How would I remove a bolt thats broken off in a piece of metal and I want to save the treads in the metal and then put in a new bolt. "
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