Output devices- Printers

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  • Created by: Olivia
  • Created on: 17-05-13 15:35

An output is used to communicate the result of data pricessung carried out by the CPU. Printers are used to produce a permanent hard copy of the information on paper. There are three main types of printer.

Dot Matrix Printers are Cheap but Not Very Cheerful

Also called impact printers. They're the cheapest type of printer- both to buy and to operate. They have two main parts

  • The printhead is a matrix of pins- either 9 or 24 pins, arranged in a vertical line or block. Each  character is formed by using a set pattern of some of the pins
  • The ribbon is a long strip of material with ink on one side. The printhead pins push the ribbo onto the…

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