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midnight security alert

 Most thefts happen after midnight hours when people

enter the second phase of sleep called ‘paradoxical’ sleep.
Here is an energy-saving circuit that causes the thieves to abort the theft
attempt by lighting up the possible sites of intrusion (such as kitchen or
backyard of your house) at around 1:00 am. It automatically resets in the
morning.
The circuit is fully automatic and uses a CMOS IC CD 4060 to get the
desired time delay. Light-dependent resistor LDR1 controls reset pin 12 of
IC1 for its automatic action


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Sun, 20/03/2011 - 21:40

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