Nothing makes me happier than seeing watts generated by people. This here is a USB charger capable of harnessing the expansion and contraction of the chest of a breathing geek. It’s a little rough around the edges… but the concept is cool.
I’d love to see one made that attaches a shoe to a person’s belt and charges while walking.
Build one yourself. Here’s a step by step guide that a 10 year old child could follow.