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Input and Output Devices - Cambridge Nationals ICT
Description
Mind Map on Input and Output Devices - Cambridge Nationals ICT, created by Jane Holroyd on 13/04/2020.
No tags specified
cambridge nationals
ict
input devices
computer systems
output devices
gcse
Mind Map by
Jane Holroyd
, updated more than 1 year ago
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Created by
Beth Coiley
almost 9 years ago
Copied by
Jane Holroyd
about 4 years ago
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Resource summary
Input and Output Devices - Cambridge Nationals ICT
Input Devices
Keyboard
QWERTY key layout
Number pad 0-9
Function bar and arrow keys
Used to enter text into a computer system
Scanner
A beam of light is passed over information to be captured
Scanned information can be edited
Used to enter large amounts of text (OCR) and images into a computer system
Digital camera
Takes digital photographs
Photos can be entered into a computer system
Magnetic strip
Black strip on a plastic card
Stores static information
Useful for information not being altered
Chip and PIN
Card with a microchip and pin nimber
E.g. Bank cards, loyalty cards
Midi instruments
Musical Instrument Digital Interface
Used for composing and entering music into a computer system
Mouse
Types of mouse
Wired
Wireless (uses bluetooth)
Optical (LED)
Laser (more sensitive)
Used to move a cursor around a screen and to select options and icons from menus
Microphone
Records speech and sound
Can be omnidirectional to allow internet audio to be converted
Used for entering audio (generally analogue)
Sensor
Device that changes analogue signals into digital signals
No human intervention required
Useful for collecting analogue data for processing by a computer system
Output Devices
Printer
Types of printer
Laser
Image is magnetised and toner particles attracted to the charged areas
More expensive
Very good quality images
Fast and quiet - good for offices
Inkjet
Tiny jets of ink are squirted on to a page
Uses four main colours
Fairly good quality prints
Slow - not suitable for businesses
Cheaper to buy, but have very expensive running costs
Used to produce a hard copy of a document
Plotter
Produces diagrams by dotting pens on paper
Slow to print, but produce very large diagrams
Suitable for architects or designers
Monitor
Also called a visual display unit (VDU)
Displays graphics, text and videos on a screen
Picture quality depends on the number of pixels (resolution)
Speakers
Produce audio output from the device's sound card
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