November 2008
Intermediate to advanced
192 pages
8h 32m
English
TALK IN SECRET OVER YOUR PRIVATE LASER BEAM LIGHT LINK.



LIGHT CONVERSATION: No one will suspect you’re communicating through a laser.
Photography by Garry McLeod
How would you like to talk over a laser beam? In about 15 minutes you can set up your own laser communication system using a cheap laser pointer and a few parts from RadioShack. The audio signal from a microphone varies the power feeding ...
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