Computer Hardware: Input, Output, and System Unit Components, Study notes of Computer science

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Computer Hardware

Input Devices

• In computing, an input device is any peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or other information appliance.

Mouse

• Wired or Wireless

Alternative Pointing Devices

• Trackballs
• Pointing Stick
• Touch pads

Pen Input

Game Controllers

Voice Input

http://www.midomi.com/ Shazam Soundhound

Scanners and Readers

Output Devices

• An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) which converts the electronically generated information into human-readable form.

Display Devices

LCD Screens CRT

Display Devices – Cathode Ray Tub

LCD – Liquid Crystal Display

• http://www.youtube.com/watch?v=jiejNAUwc Q

• RESOLUTION:

• 1280×1024 Pixels, 60 Hz, 8 Bit Color Number of bits per second displayed?
• Camera has Mega Pixels (Million Pixels)

Printers, Plotters and Projectors

The System Unit

• The case that contains all the electronic components
• Includes:
  • Motherboard
  • Processor(s)
  • Memory
  • Buses
  • Drive Bays and Drives
  • Power Supply
  • Video/Graphics cards
  • Wireless adapter card
  • Fans/cooling