Soccer Ball That Is Also A Portable Generator

(YouTube link)

Many children around the world don't have electricity but they do play soccer. The soccket is a soccer ball that captures energy with every kick. Fifteen minutes of play produces three hours of light.

The sOccket harnesses the kinetic (motion) energy of the soccer ball during normal game play and stores it for later power needs. After play, an LED lamp can be plugged into the sOccket to provide light for reading and other activities normally impossible after dark.

It's a clean, portable generator that can provide light to families in need around the world. Four Harvard students created this project for the American Express-sponsored Take Part program. - Via John Gushue ... Dot Dot Dot

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If the human expends energy to kick the ball around, wouldn't it be more efficient for the human simply to crank a generator?

Sometimes the less glamorous ideas are the ones that work.
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Of course there's always the already-widespread and very inexpensive 'shake torch' - shake for a minute and it gives you 10 minutes of light. Advantage: if the power runs down in the middle of the night you don't have to boot it around the house in the dark until it's recharged.
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