Having read previous posts i’m going to push the button on a Revo.
I’ve looked into the charging a GPS aspect a bit and decided to keep it simple
During the day i just want to unplug the lead from the back of the Revo and plug it into a magic box ( kept in the front of my frame bag ) i want the output from the box to be usb so i can charge either a GPS on the bars or my phone in the frame bag. This solution would have a strong chance of being waterproof and reliable
Does anyone know of a simple / lightweight / box that does this.
Cheers Mark

K-lite

I’ve just received my revo – first impressions are very good indeed. I’m also after a charging solution, and I think I’m going to go with a kemo 172n. Looks like it will kick out 800ma at 5v, which should be ok to charge most USB powered stuff at a decent rate.
Available from Here

If I have time I may experiment with building my own solution – a bridge rectifier, smoothing capacitor and 5v voltage regulator is probably all that is needed and will save £££.

Would this do the trick?

http://www.use1.com/exposure-lights/accessories/smart-port-plus/boost-cable

Straight out of the back port of the Revo?

I might be wrong but i believe the revos output is not regulated so youll probably struggle , also to power both the light and the garmin – might be asking a bit much of the hub. There are a few gizmos that add inline switching and regulate the output though. Not sure what they are called try rob dean hove or paul erringtons blogs for details

http://cyclingabout.com/index.php/2012/03/list-of-hub-dynamo-power-supplies-for-usb-devices/

Thanks for all the replys
In the end i have gone for a brightbikelabs.com revolution from the states
pricey but seems well engineered.
I’ve ordered my Revo aswell so i let you all know
Mark