A2 - Peripheral devices Flashcards
Input devices
Mouse - Pointing device allows user to control the screen by selecting objects
Game controller - Control game using joystick
Sensor - Takes reading of environments such as temp or lighting
Output devices
Monitor - Visual display of user interface
Projector - Visual display of user interface shown on wall or screen
Printer - Turns files into physical files
Whare are hard disk drive’s
Give the advantages and disadvantages of a HDD
Used as primary storage
Platters made of magnetic material
Advantages - Big storage, low cost
Disadvantages - Slow speeds, moving parts, heavy
Solid state drive
Flash memory
Remembers data even when powered off
Advantages - Fast read/write speeds, less power consumed, no moving parts
Disadvantages - More expensive, less storage, infinite number of writes
USB flash drive
Transfers data between diff computers
Can backup files
Advantages - Portable, durable, compatible
Disadvantages - Easy to lose, small storage, finite amount of writes
SD cards
Small memory used in cameras
Advantages - Extremely small, portable, no moving parts
Disadvantages - Small storage, big variety leading to confusion
Optical disks
Used to store films or music
Blu-Rays and CDs
Advantages - Portable, most PC has optical disk
Disadvantages - Small storage, flimsy, infinite writes
Manual and automatic data processing
Automates input and processing of data
Reduces human error
Manual processing - Keying clients, marking exams
Automatic processing - Biometric readers, barcode readers
Accessibility devices
Alternative input and output devices for people with disability
Trackball - Alternative to a mouse. Movable ball
Braille keyboard - Keys are bigger to allow typing to be done. For visual impaired
Voice commands - Used by people with visual impairment
Eye motion sensor - Control navigation with eyes. For limited mobility
