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April 18, 2017 AT 9:00 am

Modulated LED: Physics & Perception Science Activity #MakerEducation

ModulatedLED DSC 0282 H

Another fun activity from the Exploratorium Teacher Institute Project.

Audio signals can be carried by radio waves or as electrical pulses in wires. Other forms of electromagnetic radiation, such as visible light, can also carry audio signals. In this Snack, you can build a simple device that will transmit audio signals from a radio or digital-music player via a blinking LED to a solar cell.

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