Researchers discover battery-free technology which harvests power from radio and Wi-Fi signals for low-powered devices - eviltoast
  • TimeSquirrel@kbin.melroy.org
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    4 months ago

    Technically, a properly tuned receiver that’s using the signal for power can create radio “shadows” behind the device. People have also been caught with giant coils in their attic siphoning power from nearby radio stations and high voltage power lines, because they can detect the power draw.