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Old 12-11-2008, 02:52 AM #1
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Default trip meter

I wanna make a IR trip meter where when the beam is broken like an alarm woulf go off or turn a light on or something. any suggestions?


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Old 12-11-2008, 03:00 AM #2
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Default Re: trip meter

http://www.metacafe.com/watch/113300...serbeams<br /> might be a good place to start. I built one of these but I modified the circuit slightly so it actually stays on after getting tripped.
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