Transmit Audio With a Laser Pointer!

Heres an intresting article. Its instructions how to make a transmitter and reciever that uses a laser beam instead of radio frequencies.
Using a simple laser pointer, a few misc parts, and about 15 minutes, you can make a simple laser communicator that converts a sound source into light that travels across a room, and back [...]

Source: http://www.scotthough.com/transmit-audio-with-a-laser-pointer/

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