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Step 5Tweaking...
Turn on the laser and point it at the photocell box. You will have to adjust the resistor so the photocell is sensitive to the laser pointing at it during the day. At night, when the laserbeam is broken, the siren will sound.
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Apr 4, 2011. 10:31 AMxqw
says:
plz tell how cn v adjst the resistor
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Sep 25, 2010. 10:27 AMdasimpson1981
says:
the best idea here would be put the ldr in a tube so it gets less amient light
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Feb 20, 2009. 3:57 AMakinich
says:
how do you adjust the resistor
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