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DIY Dynamo USB Charger for a Bicycle | 自作の自転車用のダイナモ充電器(USB) | by Robert Thomson
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DIY Dynamo USB Charger for a Bicycle | 自作の自転車用のダイナモ充電器(USB)

See www.14degrees.org/en/?p=5203 for full instructions on how to make a home made USB charger for your smartphone on your dymano hub equipped bicycle.

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Taken on August 4, 2013