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    IR Switch

    I also am interested in this circuit,I am basically doing the same thing,but my beam is a shorter distance( 10 - 12 ") and will be operating a small dc motor( 1.5- 9vdc) so this circuit has capability to run motor without a relay?
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    Random Shock From Water Heater / Geyser

    As being an electrician for 31+ years,I would recommend grounding your water pipe system if it is copper or galvanized,also the water heater itself should be grounded,( I would check my main ground also,because some contractors use cheap clamps that corrode and fall apart because they really...