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You need a 12 vdc regulator option if you are going to charge a battery, charge (or run) a PowerPack or power a 12 vdc appliance. When you pedal sometimes you pedal hard and sometimes less hard. This means that the voltage fluctuates. Without a 12 vdc regulator you may damage batteries or appliances you are trying to charge or run.
An car alternator from a scrap-yard perhaps ? (could also be the source of the rectification and voltage regulation components).http://en.wikipedia.org/wiki/Alternator#Automotive_alternators
Not a bad drawing for a touchpad. It's hard enough with a mouse!I think I see a wee prolem with your idea though. If the motor from your old washing machine is the kind I think it is, it won't work as a generator.
... I would need to use a car alternator instead, presumably that would keep everything DC right and then all I would need to do is hook up the inverter to the battery to "invert" it to AC?
Efficiency of automotive alternators is limited by fan cooling loss, bearing loss, iron loss, copper loss, and the voltage drop in the diode bridges; at part load, efficiency is between 50-62% depending on the size of alternator, and varies with alternator speed
Scotty from Star Trek is Scottish? 
Hmmm...So would there be any possible way to improve efficiency at all?What about multiple motors connecting to the same regulator, battery etc?
First law of thermodynamics Energy can neither be created nor destroyed. It can only change forms. In any process in an isolated system, the total energy remains the same.
... it possible to store electricity in a battery that doesn't use chemicals (if they exist)
... a peak of around 150W if you go all out
... you could tell he was not really a Scottish engineer because he didn't liberally sprinkle his sentences with expletives.
Hmm. To be honest I think exercise equipment should be incorporated into places like gyms where they just have rows and rows of cycling machines, cross trainers, treadmills etc. That way the electricity would soon build up right?
... The gym is the first human-powered gym in the U.S.Adam Boesel, a personal trainer and the owner of the gym came up with the unique idea. He describes, "We're just harnessing that extra energy that they put out anyway. For people, that's a no-brainer. They say it's there, you might as well capture it."Mr. Boesel is no mental slouch either. He helped to rig up the gyms spin bikes with weedwacker motors and truck alternators to provide juice to the gym's systems.