This was our first generator, designed for a standard 26″-wheel bicycle to reverse-drive a permanent magnet motor. Metal can be found at a junkyard, and a 24-volt motor can be purchased off Craigslist to serve as a generator. There is no cheaper, quicker way to do it. This model has been showcased for purposes of emergency preparedness.
Click here or tap the image below for a high-resolution PDF drawing, so you can make your own:
