turn on an LED in Yoyo

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Cyrus the Great

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hi.I want to turn on an LED without using battery.and I want to put it in Yoyo . in fact I want to use manically potential to turn on the LED.pleas help me to do this
 

Poor choice of wording

I think they mean "mechanical", generating the electrical power from the rotation of the yoyo. It isn't as easy at it seems, the magnets have to spin at a different rate to the 'core' for it to work as a dynamo.

Brian.
 

sorry for my mistake.yes as betwixt said I want to use mechanical potential to turn on the LED.So is there any other idea to help me to do this project?
 

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