Joined: Nov 2006
Posts: 19,810
Likes: 597
From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
If you search for "bicycle dynamo usb charger" (or something like that) on eBay, you'll find a lot of options. For $20-$40 you can get a complete system including a cheap sidewall dynamo and a converter that transforms the dynamo's AC output to DC in a USB plug. I use one of these with a dynamo hub. There are also more expensive converters, such as the SineWave.
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