Pedal-Powered Radio Transmitter

The Pedal Radio (or Pedal Wireless) was a radio transmitter-receiver powered by a pedal-driven generator. It was developed by Alfred Traeger in 1929 as a way of providing radio communications to remote homesteads in the Australian outback.[6] There were no mains or generator power available at the time and batteries to provide the power required would have been too expensive. It is considered an important Australian invention.[7]

https://infogalactic.com/info/Human_power#Pedal-powered_transmitter

I'd like to see a low power computer running on one of these, with like some kind of "natural" battery like compressed air or something in case you stop pedaling for a bit...