I have some pics from last winter i thought i'd share from my dynamo hub 5v charger project. I finally got it to work but unfortunately it doesn't work well. i think i would have to ride across Canada to fully charge my phone. The output of the hub is 6v 3w if i remember correctly. the first version did not include a diode on the output that resulted in actually draining my phones batter when i rode. I was a lil' discouraged and put it on the back burner for a bit. I finally got it to work successfully but my hub doesn't seem to produce enough juice to charge even a battery pack. I ride my bike often too. At least 30km a day. maybe that's not often but it is for me.
Here is the schematic
and the breadboard prototype
soldered it all together
then wired it up and jammed it into a dental floss container.
I calculated a 1 amp output on the hub. Not sure what i'm missing. Does anyone have any suggestions?