Soon to be release, a dynamo charger for phones.
Hardy groundbreaking is it?
http://www.theregister.co.uk/2010/06/03/nokia_bicycle/
Nokia phone charger
Re: Nokia phone charger
Here's one i put together. Would only cost less than a squid. 4 diodes and a capacitor wired in a bridge.
Charges my Nokia phone when i am on the turbo.
There's lot's more for the technically minded here. viewtopic.php?f=5&t=17084
Charges my Nokia phone when i am on the turbo.
- Click to enlarge
There's lot's more for the technically minded here. viewtopic.php?f=5&t=17084
At the last count:- Peugeot 531 pro, Dawes Discovery Tandem, Dawes Kingpin X3, Raleigh 20 stowaway X2, 1965 Moulton deluxe, Falcon K2 MTB dropped bar tourer, Rudge Bi frame folder, Longstaff trike conversion on a Giant XTC 840 
Re: Nokia phone charger
I was thinking of something similar (but more techy). The voltage drop across the regulator bothered me so I was considering a precision rectifier (FET's instead of diodes, using an op-amp to detect the incoming polarity). A single diode and smoothing cap would provide the initial 'kick' to get the op-amp up and running.
Not as cheap as yours and if yours works well enough then probably not a lot of point. But I figured the voltage may be only around 3.5v or so after the bridge which wouldn't be enough for some of the stuff I wanted to run. I guess you didn't have this problem?
Not as cheap as yours and if yours works well enough then probably not a lot of point. But I figured the voltage may be only around 3.5v or so after the bridge which wouldn't be enough for some of the stuff I wanted to run. I guess you didn't have this problem?