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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0000:  The Start of the PC
      9  V  Electricity

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Diode
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LED

A specific type of diode is very popular in computer equipment. That is the Light Emitting Diode (LED).

It is used to indicate something is on, working or busy. A pair of typical LEDs for computers appears in Figure 15.

Figure 15: A pair of LEDs. Some LEDs have a multi-color output that can be used to indicate different states of operation.

 

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