DIY Bicycle-Powered Cell Phone Charger from Makezine, Google+ & RadioShack
Earlier in the week they showed you how to make a bike exhaust tailpipe to amplify the card in the spokes.
The second bicycle themed summer Maker Camp session from Makezine and Google+ goes live Saturday, July 13, at 11am PT/2pm ET on Makezine’s G+ page. They’ll offer live Q&A for the project there, or you can grab the project details from their website and do it on your own time. No, it ain’t pretty, and perhaps not even all that efficient, but it’s as much about learning as it is actually making the thing. Which might help you figure out ways to hack existing dynamos (like this and this) to suit your own needs.
Check the video below to see how it works…