Getting off the Grid
Free Plans To Build your own Bicycle Generator Pedal Power Station. Fauna. Bicycle Powered Generator. I skim a few Usenet newsgroups daily, among them misc.survivalism and alt.energy.homepower.
Frequently posters on these two groups will inquire about generating electricity using a stationary bike coupled to some sort of generator. Most replies are to the effect that while it’s possible to do this, the amount of power output by such a rig when pedaled by the average person wouldn’t be worth the effort.