Hi,
I'm looking at making my own hand crank charger.
I do know that I can find "hand crank chargers", by doing that search on Google.com, no problem.
But, I want very much to make my own, and would like some advice.
The ones advertised vary in description, but claim that by turning the crank for 5 minutes, you basically get the same amount in cell phone battery life time (if you have no other means to charge the phone).
The heck with that. I want to make one that gives you 10 minutes of battery life time, for 5 minutes of winding the crank.
Please direct me to a site/page that has a simple diagram of what would be needed for a portable crank device. Of course, this device would have to have some kind of battery / capacitor storage, to temporarily hold the energy produced by the 5 minutes or so of cranking. Please just help get me started if you know of such schematics.
Thanks, George