Battery Powered Burglar Alarm

Published:2012/11/19 1:36:00 Author:muriel | Keyword: Battery Powered, Burglar Alarm | From:SeekIC

This is a single zone alarm - with independently adjustable Exit, Entry and Siren Cut-Off timers. It will accommodate the usual types of normally-closed input devices - such as magnetic-reed contacts, foil tape and PIRs. When the alarm is activated - the Siren will sound for up to 20-minutes. Then it will switch off - and remain off. The alarm will not re-activate. If you wish - you can use a mains power supply. But the extremely low standby current makes battery power a realistic option. I've used a 9-volt supply in the drawing - but the circuit will work at anything from 5 to 15-volts. All you need do is select a Siren, Buzzer, and Relay to suit the voltage you're using.



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