Build this single zone DIY burglar alarm using cheap off-the-shelf components. It's suitable for all types of premises - including caravans, campers and mobile homes.
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Cmos Single Zone Intruder Alarm - Photograph

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Cmos Alarm System
Schematic 		The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International


Circuit Board

This is a photograph of the Cmos Single Zone Intruder Alarm circuit board. 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 open and normally-closed input devices such as pressure mats - magnetic reed contacts - micro switches - foil tape - PIRs and Inertia Sensors.


A Photograph Of Ron J's Cmos Single Zone Intruder Alarm - Circuit Board


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Cmos 4081 Burglar
Alarm - Schematic 		The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International
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