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Researchers discover battery-free technology which harvests power from radio and Wi-Fi signals for low-powered devices (www.tomshardware.com)

submitted 4 months ago by schizoidman@lemmy.ml to c/technology@lemmy.world

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cross-posted from: https://lemmy.ml/post/18426215

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[–] johntwinkletits@lemmynsfw.com 59 points 4 months ago (4 children)

Definitely not new. This is how RFID tags work. They harvest energy from the transmitter to power the circuitry in the tag to send back a response.

[–] SynAcker@lemmy.world 8 points 4 months ago (1 children)

Not new indeed. Kinda reminds me of old Nextel phones that you would put a little LED on the antenna and it would blink from the EMI when sending and receiving data.

[–] johntwinkletits@lemmynsfw.com 1 points 3 months ago

Those were cool!

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