Automatic Turn-Off Alarm With Delay

Posted on Apr 6, 2012

In this circuit, IC1A and IC1B act as a monostable multivibrator. Any input from the sensors SI through

Automatic Turn-Off Alarm With Delay
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S5 forces IC1A to produce logic low, which causes IC1B to turn on Ql until C3 changes through R6. This action resets the latch formed by IC1A and IC1B.

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