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piezo generator

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Uploaded on May 6, 2009

How can you generate energy from movement or pressure? A simple piezoelectric disk (the kind that you use as a transducer/sounder) can be used in reverse to generate a momentary voltage. This short clip shows how an LED, soldered across the disks of a piezo, illuminates when the disk is tapped or pressed. Notice that the LED lights more effectively when the piezo is pressed rather than tapped...

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