Build this vehicle hijack alarm using cheap off-the-shelf components.
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Hijack Alarm No.3 - Photograph

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ANTI - HIJACK
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Hijack Alarm No.3
Schematic
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Circuit Board

This is a photograph of the Cmos based Hijack Alarm No.3 circuit board. Like the first two Hijack Alarms - if a door is opened while the ignition is switched on - the circuit will trip. And after a few minutes delay - when the thief is at a safe distance - the Siren will sound. But this time the engine doesn't go on to fail automatically. Instead - it will continue to run until the ignition is switched off. Then - it won't re-start.


A Photograph Of Ron J's 
Hijack Alarm No.3 - Circuit Board


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Hijack Alarm No.3
Schematic
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