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.

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