HiJack car Alarm


Posted on Apr 11, 2012

This circuit is designed primarily for the situation where a hijacker forces the driver from the vehicle. If a door is opened while the ignition is switched on, the circuit will trip. After a few minutes delay - when the thief is at a safe distance - the alarm will sound and the engine will fail. Before fitting this or any other engine cut-out to your vehicle, carefully consider both the safety implications of its possible failure - and the legal consequences of installing a device that could cause an accident. If you decide to proceed, you will need to use the highest standards of materials and workmanship.


HiJack car Alarm
Click here to download the full size of the above Circuit.

You`re going to trip this alarm unintentionally. When you do, the LED will light and the Buzzer will give a short beep. Its length is determined by C3. Its purpose is to alert you to the need to push the reset button. When you push the button the LED




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