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Learn audio transmission with light

Believe it or not. We can send the audio with light. Today was fun for friends to play with their children, Learn about the equipment or use a transducer system. The change of light energy. Into electrical energy. And the change of electrical energy into sound. Change from light to sound. Light that we see. May be mixed with the audio signal.We normally can not detect it. But this be Light Wave Receiver circuit can tell it, perform take sound signal from the light by modify from the light into pieces hear at a loudspeaker. By the circuit uses LM741…

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