Diode

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File:Circuit symbol--Diode.svg

Circuit diagram symbol for a diode

A diode is a component that allows current flow in one direction only.

Diodes are used on contact-switched keyboards to provide N-key rollover support. They also provide the electrical basis for light-emitting diodes, which amongst many other things provide backlighting for keyboards.

• 
  Diodes on the Zenith Supersport SX keyboard
• 
  Cherry MX Black switches with diodes fitted
• 
  Surface-mounted diodes on a KBC Poker II PCB

External links

• Diode at Wikipedia