The design firm Pedal Power created two such cycling generators that produce electrical power known as Big Rig and Pedal Genny.
The Pedal Genny is a more portable, single function machine. It has an optional seat, but no work surface.
It features a flywheel to smooth pedalling, full-size cranks, and an all-steel, hand-built frame, the company said.
It has been used for generating electricity, milling grain and pumping water, but can be configured to power most any mechanical device requiring less than 1 horsepower.
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An average adult can use it to generate 100 watts of electricity, pump 5 gallons of water per minute, grind a variety of grains, as well as operate an air compressor, a hydraulic pump, most any hand-cranked machine, and a variety of small shop tools, the website said.
It has been found to be particularly suitable for small scale agricultural applications such as cracking grains, churning butter, and pumping water.
"Bicycle technology can and should be used for many everyday tasks. Using your own power rather than plugging into the grid is not only fun, but helps you understand your energy use and reduce your ecological footprint," the company said.