Bicycle generated power

[Skvez]

On a separate thread Hrusai mentioned wanting to be able to generate power on a bicycle. I though this discussion would be better placed on its own thread.

You can get Dynamo bicycle lights (just search for "bicycle Dynamo" on Amazon). These are intended to run the lights on the bicycle but are typically 6V so could be re-purposed to charge a device (phone/GPS etc). The advantage of these is that they produce power while you're cycling. The amount of power isn't very much but you typically only just notice the extra amount of work you need to do.
A quick scan suggests these are about 3W 6V so 500mA. That would be respectable (for charging a phone) if it's actually a typical output.

In a fixed location you would typically want something larger (where a larger percentage of your peddling work was converted to electricity).

Dynamo bicycle lights (as lights) went out of popularity because they stopped working when you were stationary at a junction and so were not as safe as battery powered lights. Its good to see they haven't disappeared altogether.

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This site:
http://www.pedalpowergenerator.com/
might be a place to start for someone looking to use a bicycle to generate larger amounts of power in a fixed location.