Originally Posted by
jeneralist
Let's say I'm already convinced -- looking for USB power, rather than to directly power lights. What's a good resource to look at to figure out all the bits and pieces I'll need?
Do you want to solder one together or do you want to buy? I soldered one together for under $10 in parts. But if you don't know how to do that, you are better off buying a complete one.
In addition to the ones mentioned by Bmike, I think B&M now makes one with a USB port built into a headlight. If interested, check Peter White's website.