Computer Hardware. Input Devices In computing, an input device is any peripheral (piece of computer...

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

Voice Input

http://www.midomi.com/ShazamSoundhound

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

• More on this later