Here is a great project that will keep your cellphone going when you have no outlet to charge it with. Ben Heck from the Ben Heck show took a cheap wind-up flashlight, added a small diode, resister and a female USB port to make a hand-crank charger for devices that charge via USB.
I wouldn’t recommend using this to completely charge your phone as it would take hours of continuous cranking to get it there, but you can easily get enough juice for a call on a cell phone with just a few minutes of cranking. Its perfect for emergencies.
[Link to The Ben Heck Show]
DIY: Wind-Up Cellphone Charger originally appeared on tech.nocr.at on 2011/01/25.
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