Damn impressive when you realize how hard it is to produce any power that way.
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Standard hub dynamo will put out 6 volts, 3 watts.
Random 4k tv I found online has a listed typical consumption of 57 watts.
You'd need twenty of these bikes hooked up to some kind of rectifier that can convert the power into something usable.
A hub dynamo is designed to take as little power out of the wheels as possible to not slow down there bike too much.
If you put a bigger dynamo on a stationary bike you can get much more power out of it, between 50 to 100W.
Hidden spider is >!on the remote!<
Just as context, despite being ridiculously over-dramatized (the music and editing is oh my god levels of eye roll), here's a really cool video about it: https://inv.nadeko.net/watch?v=S4O5voOCqAQ
OK, this one was sneaky. Cheating even!