3 ms·

> You can use a germanium diode or even Shottky now instead of a “crystal”. Or a razor blade or a piece of roofing lead and a needle.

• wingspar 1y ago
  Now I’m interested…
  • jacquesm 1y ago
    Diodes occur naturally, all you need to do is find them! Good places to look for them are conductors and crystals. https://en.wikipedia.org/wiki/Crystal_detector https://en.wikipedia.org/wiki/Crystal_detector https://rimstar.org/science_electronics_projects/razor_blade_diode_for_crystal_foxhole_radio.htm https://rimstar.org/science_electronics_projects/razor_blade... Good luck! And don't sneeze once you've found a good spot.
    • peterfirefly 1y ago
      > Diodes occur naturally, all you need to do is find them! Even true for LEDs! https://en.wikipedia.org/wiki/Silicon_carbide#Natural_occurrence https://en.wikipedia.org/wiki/Silicon_carbide#Natural_occurr... https://en.wikipedia.org/wiki/Light-emitting_diode#History https://en.wikipedia.org/wiki/Light-emitting_diode#History