Theft preventer alarm


Posted on Feb 4, 2014

This circuit utilising a 555 timer IC can be used as an alarm system to prevent the theft of your luggage, burglars breaking into your house etc. The alarms goes ON when a thin wire, usually as thin as a hair is broken. The circuit is straightforward. It uses a 555 IC wired as an astable multivibrator to produce a tone of frequency of about 1kHz w


Theft preventer alarm
Click here to download the full size of the above Circuit.

hich gives out a shrill noise to scare away the burglar.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

RS232 reciever schematic
Balanced-tmos-vco
Electronic Coin Toss
Early VDO Tachometer Guts
Simple Switched Servo Driver
Efficient Fan Speed Controller



Top