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 ...
LastYearsPumpkin @ LastYearsPumpkin @feddit.ch Posts 3Comments 450Joined 2 yr. ago
LastYearsPumpkin @ LastYearsPumpkin @feddit.ch
Posts
3
Comments
450
Joined
2 yr. 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.
https://www.theverge.com/23810061/zenith-space-command-remote-control-button-of-the-month