transistor based single zone alarm


Posted on Feb 7, 2014

The circuit features automatic Exit and Entry delays, timed Bell Cut-off and System Reset. It has provision for normally-open and normally-closed switches and will suit the usual input devices (Pressure Mats, Magnetic Reed contacts, Foil Tape, PIRs and Inertia Sensors)..


transistor based single zone alarm
Click here to download the full size of the above Circuit.




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