auto theft alarm

R. Rastetter auto theft alarm Readers who are in the habit of parking their cars close to lampposts at night may presume that the vehicle is considerably safer in a well lit area. However, it could be mentioned that car thieves, as a rule, like to see what they are getting! Further precautions are, therefore, very necessary, or your car could still be found to be gone. Alarm circuits for this purPose must be: a. reliable; b. easy to operate, and c. failsafe. After all, if the neighbours have been woken uP several times on previous occasions due to false alarms, it may not be easy to maintain good re- door switch S2. If required, the interior (courtesy) light can be made to remain lit by replacing diode D6 with a wire link. A point worthy of note is the fact that no matter how fast the would-be car thief opens and closes the door, the alarm will remain active since the relay has operated. The other contact of the relay, relb, enables the charge path for capacitors C2 and C3. At the...