Burglar alarm using ic 555 and an LDR laser pair

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02:33:31

The NC switch is a laser LDR pair and  the NO switch is the reset switch . I'll be writing the explanation for this whole circuit soon. The basic understanding : two ic 555 form a controller oscillator for producing the alarm time .. A  SR latch is used to set and reset the alarm state . I'm doing this one on the top of my mind .There are still a few additions to make it more "fancy"

published 9 years ago

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