this post was submitted on 06 Nov 2024
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The article is very misleading. It says
But I read much of the pdf linked at the bottom of that link, and there’s nothing about the human body generating energy at 40MHz. The trick is that skin is pretty effective (sort of) at conducting energy at that frequency, so the authors hooked up a power transmitter worn on the forearm, 5 or 15cm away from a receiver on the hand.
This isn’t about powering anything by body energy, it’s about strapping a battery-powered transmitter somewhere on your body and then having another device pick it up when strapped somewhere else on your body. No thanks.
Oh and it’s actually pretty inefficient and won’t provide much usable energy.
Seems it's a re-write of this article from Monday, leaving out the transmitter part.
https://hackaday.com/2024/11/04/power-over-skin-makes-powering-wearables-easier/
(their source from 3 weeks ago) https://youtu.be/5PEN04-jyCU?si=JzzeLW6KalDKxOss
Power isn't harvested from the human body it's transmitted (in really small amounts) across the body from one device to another, using capacitive coupling and 40MHz AC voltage.