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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.
Keyboard
• Wired or wireless• Keyboards for phones• Ergonomic Keyboard
Mouse
• Wired or Wireless
Alternative Pointing Devices
• Trackballs• Pointing Stick• Touch pads
Touch-Sensitive Pads and Touch Screens
Pen Input
Game Controllers
Visual Input
Scanners and Readers
Biometric Data
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
Display Devices – Cathode Ray Tub
LCD – Liquid Crystal Display
• http://www.youtube.com/watch?v=jiejNAUwcQ8
• RESOLUTION:• 1280×1024 Pixels, 60 Hz, 8 Bit Color
Number of bits per second displayed?
• Camera has Mega Pixels (Million Pixels)
Speakers, Headphones, Earbuds
The System Unit
• The case that contains all the electronic components
• Includes:– Motherboard– Processor(s)– Memory– Buses– Adapters/Expansion Slots– Drive Bays and Drives– Power Supply
Motherboard
• Holds many of the crucial components of the system, such as the central processing unit (CPU) and memory, and provides connectors for other peripherals
Processor(s) or CPU
• CPU: stands for Central Processing Unit. Is the hardware within a computer system which carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of a system.
• Multi-core – two or more CPU’s• Node – Holds a Multi-core CPU
Multi-Core and Parallel Processing
Pipelining
Threading and Hyperthreading
• Each CPU can handle a thread• Thread does a pipeline• CPU has to execute pipeline for each thread
• Hyper threading
Cooling
Video/Graphics Cards
Speed and Performance
• Measured in Hz (number of cycles per second)• Refresh Rate of TV, 60, 120, 240 Hz
(GO BACK TO LCD SLIDE)• Processors now at GHz
That’s 1,000,000,000 Hz (Billion)
Speed and Performance
Memory
• Hard drive• RAM