You just knew that any bicycle related gadgetry was gonna come from those "fiets" lovin' Dutch, eh? Sure enough, Mark Hoekstra has managed to convert a standard dynamo electric generator into an iPod ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

Click to open image viewer. This model of a direct-current generator was designed by Elihu Thomson to produce a constant voltage. It could also be used as a motor that would maintain a constant speed.