An SCR Based Burglar Alarm

Published:2012/11/19 1:32:00 Author:muriel | Keyword: SCR , Based Burglar, Alarm | From:SeekIC

This is a simple SCR based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell cut-off and Reset. 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. The basic alarm has a single zone with Exit/Entry delays. This will be adequate in many situations. However - larger buildings are better divided into zones. The modular design means that you can Add Any Number Of Zones to the system. These Instant zones may be triggered by normally-open as well as normally-closed input devices.



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