Laser Beam Alarm


Posted on Jul 24, 2012

This Alarm can be used to protect your property, Inside or Outside. And it can protect a Very Large area such as the complete perimeter of your yard. Be Aware: There are some Possible Drawbacks: Snow or Fog could Block the Beam, Giving a False Alarm.


Laser Beam Alarm
Click here to download the full size of the above Circuit.

You may also want to Build More than one of these alarms, so as to detect intruders in Different area`s, Making a More Refined System. It uses the Cheap "Laser Pointers" (Slightly Modified) as the laser light source and they are found




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