The story of the fidget spinner generator

 Fidget spinners became trending toys in 2017. I bought one, I look at it I've spin it. Than I read an article " How many fidget spinners can power a light bulb? " , you can still find the article here : The article . They said "as spinning 54,000 simultaneously could power an LED bulb for an hour ". It looks like I have a problem with the bulbs, again 😅. If it wasn't so hard with the small generator ( you can read the story here : Small generators story) to light a domestic bulb I will probably have a small chance with the fidget spinner.

So, lets get to work ! 

What do we know ? 

Moving a magnet inside or near a coil of wire, pushes the electrons in the wire and creates an electrical current.

First lets try to light a small led (case 1 ) , to see how it works, I will think about the domestic led bulb later ( case 2 ).

The model is simple in this first case , all we need are neodymium magnet discs (3 peace), a fidget spinner with iron insertions, a coil with thin wire and many turns and a led.





Why is possible ? Energy is transferred from one state to another. The rotor is rotated ( the fidget spinner ) and this mechanical rotation is converted to electrical energy in the stator (the coil ) resulting AC ( alternating current )







For a moment I said, apparently there is no way to light a domestic led with a single fidget spinner, but what if I barrow the setups from the small generator? 

It will works ....hmmm


Now case 2 

VIDEO : 9 W domestic bulb and fidget spinner generator : 



It works ! 

Author : S.T. Bucharest Romania

Email: sciencetoolbar@gmail.com

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