Electronic Burglar Alarm System for Automobiles

Abstract

The Burglar alarm gives an alarm sound if any attempt is made to steal the automobiles. The automobile alarm can be designed in different ways depending upon the type of the automobile and place where it is to be fixed in the automobile. The alarm accepts signals from a variety of sources including special sensors and the standard switches in a car such as the door and ignition contacts. The circuit consists of timers triggering circuit, delay and control circuits which provides relay out-put that controls an acoustic transponder (loud speaker or buzzer).