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The Diodes

Basically, there are two versions of rectifier diodes...

  • Diodes with a semiconductor-semiconductor junction (silicon diode, germanium diode...),
  • Diodes with a metal-semiconductor junction (Schottky diode).

They have in common that they have two ports, the anode (A) and cathode (K). The cathode is typically marked by a printed ring.

In the experiments, you use three different rectifier diodes...

  • 1N4001, 1N914 (Silicon diodes)
  • BAT43 (Schottky diode)

Several diodes. (Enlarge)

There are other diodes, which are closely related to rectifier diodes... light-emitting diodes (LEDs), Zener diodes and photodiodes. They are not discussed here, but in separate topics.

Circuit symbol diode

Circuit symbol Schottky diode

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