I need a 'hand crank charger' schematic or example.

[George]

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

 

[CWatters]

"George" <spamproofemail@here.com> wrote in message
news:uqnuj0pn0cm4q23jjtbc5gmdv0c1tj1q6i@4ax.com...

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.

No problem if you have stronger arms. Perhaps just buy one and change the
gearing by a factor of 2.