A few weeks ago Keegan Stephan, a bike mechanic and member of environmental group Time's Up! brought with him to the Occupy Wall Street protests a device he built over a year ago to power his ...

With a pedal generator, you can turn human effort into usable energy—ideal for off-grid setups, emergency backups, or just a fun DIY project. This guide gives you a fast-track look at how pedal ...

Lithuanian startup Tukas EV has developed an exercise bike that harnesses the energy you produce while peddling and stores it as a backup source of power for household devices and appliances. The ...