Editing Electric generator (section)

===Human powered electrical generators===
{{main|Self-powered equipment}}
A generator can also be driven by human [[muscle]] power (for instance, in field radio station equipment).

[[File:Day 47 Occupy Wall Street November 2 2011 Shankbone 15.JPG|thumb|Protesters at [[Occupy Wall Street]] using bicycles connected to a motor and one-way diode to charge batteries for their electronics<ref>[http://cityroom.blogs.nytimes.com/2011/10/30/with-generators-gone-wall-street-protesters-try-bicycle-power/ With Generators Gone, Wall Street Protesters Try Bicycle Power], Colin Moynihan, ''New York Times'', 30 October 2011; accessed 2 November 2011.</ref>]]
Human powered electric generators are commercially available, and have been the project of some [[DIY]] enthusiasts. Typically operated by means of pedal power, a converted bicycle trainer, or a foot pump, such generators can be practically used to charge batteries, and in some cases are designed with an integral inverter. An average "healthy human" can produce a steady 75 watts (0.1 horsepower) for a full eight hour period, while a "first class athlete" can produce approximately 298 watts (0.4 horsepower) for a similar period, at the end of which an undetermined period of rest and recovery will be required. At 298 watts, the average "healthy human" becomes exhausted within 10 minutes.<ref>{{cite web |url=http://www.ohio.edu/mechanical/programming/hpv/hpv.html |title=Program: hpv (updated 6/22/11) |publisher=Ohio.edu |access-date=2012-08-24 |archive-date=2016-03-08 |archive-url=https://web.archive.org/web/20160308073502/https://www.ohio.edu/mechanical/programming/hpv/hpv.html |url-status=dead}}</ref> The net electrical power that can be produced will be less, due to the efficiency of the generator. Portable radio receivers with a crank are made to reduce battery purchase requirements, see [[clockwork radio]]. During the mid 20th century, pedal powered radios were used throughout the [[Australian outback]], to provide schooling ([[School of the Air]]), medical and other needs in remote stations and towns.