4 ms·
A pencil tip touching a steel razor blade is famously a diode which can be used to build a "foxhole" radio [1]. [1] https://en.wikipedia.org/wiki/Foxhole_radio
by mNovak 7y ago
A pencil tip touching a steel razor blade is famously a diode which can be used to build a "foxhole" radio [1].
[1] https://en.wikipedia.org/wiki/Foxhole_radio https://en.wikipedia.org/wiki/Foxhole_radio