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Thursday, March 29, 2012

Light and Laser communication !

Transmitting sound using LED or a cheap laser pointer and receiving it using a photovoltaic cell and a small amplified speaker! The Audio signal modulates the power feeding the laser pointer and so it does change its brightness corresponding to the change in the amplitude of the audio signal. A solar cell converts the variations in light back to electrical signal and outputs it to the small amplified speaker ! 

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