Car Alarm and Immobilizer

Posted on Mar 24, 2013

The alarm is `set` by opening Sw1. It can be any small 1-amp single-pole change-over switch - but for added security you could use a key-switch. Once Sw1 is opened you have about 10 to 15 seconds to get out of the vehicle and close the door behind you. When you return and open the door the buzzer will sound. You have 10 to 15 seconds to move Sw1 to the `off` position. If you fail to do so, the siren will sound.

Car Alarm and Immobilizer
Click here to download the full size of the above Circuit.

Leave Comment

characters left:

New Circuits



Popular Circuits

Laser Beam Alarm
Wireless On-Off Switch
88 108 mhz pll controller for fm
2 channel audio mixer
Zener Diode Testers
Precision frequency counter tachometer
Analog HF Antenna Analyser
Digital pulse width measurement circuit diagram CD4518 and CD4069 the