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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Transistor Alarm 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 single-zone Transistor Based 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 - and PIRs.

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

Click here if you're new to constructingstripboard projects.

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

Single Zone Transistor Alarm - Photograph

Circuit Board