A Cmos 4060 Burglar Alarm circuit


Posted on Feb 5, 2014

This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will accommodate all the usual types of normally-closed input devices - such as magnetic reed contacts, foil tape, PIRs etc. But it`s easy to add a normally-open trigger. When the alarm is activated - the siren will sound for a fixed length of time. Then it will switch off - and remain off. The alarm will not reactivate. The Circuit offers a good introduction to the Cmos 4060 and the SCR..


A Cmos 4060 Burglar Alarm circuit
Click here to download the full size of the above Circuit.




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