Comment on Researcher has developed, at a cost of less than one dollar, a wireless light switch that runs without batteries, can be installed anywhere on a wall and could reduce the cost of wiring a house by ...

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LastYearsPumpkin@feddit.ch ⁨11⁩ ⁨months⁩ ago

Back in 1956, the Zenith TV remotes didn’t require a battery and just used the power generated by pushing the button. They were severely limited in the number of buttons available though, due to the technology of the time.
theverge.com/…/zenith-space-command-remote-contro…

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