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Re:Converting Wi-Fi signals to electricity with new 2-D mate... by joezydeco on Thursday January 31, 2019 @01:44PM (#19047484)
There's a whole generation of kids that haven't built a razor blade diode / foxhole radio. That's a fun thing to do.

https://en.wikipedia.org/wiki/Foxhole_radio

Re:Converting Wi-Fi signals to electricity with new 2-D mate... by netrap on Thursday January 31, 2019 @02:53PM (#19048142)
Thanks for the link. I knew about crystal radios but didn't know about the razor blade technique.
Re:Converting Wi-Fi signals to electricity with new 2-D mate... by mmagin on Thursday January 31, 2019 @04:13PM (#19048932)
There's a remarkable array of ways you can get a crude semiconductor junction. See also https://en.wikipedia.org/wiki/Rusty_bolt_effect