3 ms·
Pretty cool, although, not entirely a new concept: http://en.wikipedia.org/wiki/Crystal_radio http://en.wikipedia.org/wiki/Crystal_radio (no battery needed for
by qwerty_asdf 13y ago
Pretty cool, although, not entirely a new concept:
http://en.wikipedia.org/wiki/Crystal_radio http://en.wikipedia.org/wiki/Crystal_radio (no battery needed for wireless reception)
Using that concept to also produce transmissions is the kicker here.
Now, "the walls have ears" takes on an entirely new meaning in "The Internet of Things"...
- frankydp 13y agoHomemade DIY guys playing with the idea. http://peswiki.com/index.php/OS:Ambient_Energy_Collection_Device http://peswiki.com/index.php/OS:Ambient_Energy_Collection_De...
- GeorgeTirebiter 13y agoTesla was interested in this, eh? I did this sort of thing in 1967 when I put a capacitor on the output of my crystal set, and was able to (very weakly) light a standard panel lamp. Nothing is new, only the details change.....
- chockablock 13y agoUnwarranted grumpiness. Harvesting power from radio transmisssion is indeed not new. What they demonstrate, however, is transmission from the 'receiver' to additional devices by modulating how much power is absorbed or reflected. This is fundamentally different from just using the harvested power to run a second transmitter, because modulating backscatter is 'orders of magnitude' more efficient.