Laser Surveillance System for under $20
Using a basic laser pointer and a sensative amplifier it is possible to listen in on conversations through exterior windows! The price of $20 is simply an estimate, in my case I did not need to buy anything.The system described in this instructable works on the same principle as commercial projects like this:
http://www.electromax.com/laser.htmlhttp://www.electromax.com/laser.html
(This photo is of a military laser exparament, but its the best laser picture I could drum up.)
By: navaburo Source: Instructables.com
