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Modulated LED - Listen to a beam of light.

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Audio signals can be carried in radio waves through space and in electrical pulses through wires. Other forms of electromagnetic radiation, including visible light, can carry audio signals, too. You can build a simple device in which the signal from a radio is transmitted on a beam of light traveling between a light-emitting diode (LED) and a solar cell.

Modulated-LED

Modulated-LED

Prepared by SAVOAN SEREYBOTH and IE PORCHOUNG

Comments   

0 #2 Administrator 2010-12-21 10:30
to 3.5mm audio jack.
0 #1 simarron 2010-12-17 05:28
i was wondering that did u connect the LED light to the 3.5mm audio jack or the sound wire inside of the radio?

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