Pratt student and designer Elizabeth Joy Wong has built a simple bicycle powered generator that could be used nearly anywhere.

Pratt student and designer Elizabeth Joy Wong has built a simple bicycle powered generator that could be used nearly anywhere. Using the device is easy – pedaling the bike causes a friction drum to spin an alternator, which generates electricity. A battery pack stores the power for later use.

There is no word whether this model is fully functional, but other designs on the market, such as the Pedal-A-Watt, can generate enough juice to power small appliances (and provide a good work out).

The Pedal-A-Watt site explains more:

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