Output Devices
Syllabus content
A range of devices for output, including screens, printers, speakers actuators.
Overview
Output devices allow the computer system to provide the use with the results of processing the data. The particular application may require this to be in permanent form or the information may be temporarily displayed on a screen. In either case the characteristics of the output device used must match the requirements of the application. The following factors will need to be considered when selecting an output device.
- Whether or not permanent copy is required.
- Medium to be used.
- Initial cost of hardware.
- Running costs - consumables and maintenance.
- Speed at which output is produced.
- Quality or resolution of output.
- Working environment - size of and noise produced by the hardware.
The topics covered in this section are:
- Visual Display Units - CRT
- Visual Display Units - LCD
- Impact printers
- Laser printers
- Inkjet and buble jet printers
- Graph plotters
- Sound
- Signals
- Actuators
- Questions
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