Automatic Intruder Alarm

Published:2012/11/19 1:30:00 Author:muriel | Keyword: Automatic Intruder , Alarm | From:SeekIC

This is a simple single-zone burglar alarm circuit. Its features include automatic Exit and Entry delays and a timed Bell/Siren Cut-Off. It's designed to be used with the usual types of normally-closed input devices such as - magnetic reed contacts - micro switches - foil tape - and PIRs. But it can be Easily Modified to accept normally-open triggering devices - such as pressure mats.



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