I was interested in generating electricity using dynamo-electric generators when all external power sources are dysfunctional (power line fault, no wind, not enough sunlight, etc). Different bicycle part sites have varying info about how much energy their unique solutions can provide, and don't have any specific information, like voltage, watts, how fast and for how long you gotta step on the pedals and such. I suppose there should be simple formulas that allow to calculate all the important parameters.
Assuming we're interested only in conventional electric devices like 220v household electronics and 3v, 5v, 12v mobile devices, what is the average output of a bicycle generator being used by an adult for, let's say 15 minutes at the same speed? For how long would that support a 100W light bulb at full brightness, and approximately how long it could take to fully charge a completely discharged battery of a modern cellphone?