I was, however, using the exercise bike generator in conjunction with a large deep cycle battery, so, the alternator was charging the battery. The laptop ran off the deep cycle battery. I think at one point I was using the battery to run an inverter to charge the laptop as well. Before I figured out that the laptop could run off 12 volts directly. Anyway, a number of unnecessary loses and the deep cycle battery drew a lot of amps which made the peddling more difficult than it needed to be just to run a laptop.
Also, the car alternator I had running directly on the tire via friction drive, so I had to peddle like mad just to get the alternator up to a high enough RPM.
This looks like a better idea. A 10 speed bicycle can be geared up much more easily, and using minimal batteries to keep the alternator energized makes more sense than trying to keep a giant deep cycle battery charged.
https://youtu.be/kVAZIDFMRXY
Anyway, the point I wanted to make is that with a modest 12 volt DC output, it would be possible to run a DC to AC inverter that could then power normal household appliances, like the food processor, hand tools and so forth.
I bought one of these Amish modified inverters locally that run off a DeWalt (or other) hand tool battery to supply 300 Watts AC power.
It works surprisingly well.
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What they do is have a charging station in the barn to charge a bunch of these hand tool batteries up all at one time for the whole community, from a big diesel generator.