Bicycle Power adaptor for Freerunner

Alexander Mueller XelaRellum at
Tue Feb 17 16:23:12 CET 2009

Thanks a lot. Yes, I recall having seen this article. But didnt read it 
back then. And of course I threw out my old c't s quite some time ago. 
But will have a real close look at this.


Konstantin schrieb:
> Hi there!
>> Hey all,
>> is anybody out there who is using the FR on longer trips for navigation 
>> and/or geocaching? How did you solve the power problem?
>> I would love to have an adapter from my hub generator for the 
>> Freerunner. Should not be too difficult. Something to convert AC to DC 
>> and then maybe some switching thing to getthe right voltage (DC/DC 
>> converter or what).
>> Does anybody have a solution or some hints?
> Assuming you're from Germany due to your name and mail provider ( ;) ), the
> computer magazine c't had an interesting workshop-article explaining how to
> build a voltage converter with rechargable battery to power devices via usb with
> the hub generator of a bike.
> The Article can be found here:
> (alas, not for free, they want 60 cents for it - alternatively, you can ask
> someone with a c't subscription for the article)
> They also had a multi-parted workshop in their TV show, a link to the archives
> can be found here:
> hth,
> Konstantin
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