Computer Hardware Input Devices
Total Page:16
File Type:pdf, Size:1020Kb
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/ Shazam Soundhound 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=jiejNAUwc Q8 • RESOLUTION: • 1280×1024 Pixels, 60 Hz, 8 Bit Color Number of bits per second displayed? • Camera has Mega Pixels (Million Pixels) Speakers, Headphones, Earbuds 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 The System Unit The Case 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 Motherboard 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 Processor(s) or 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 CD-Rom Drive Video/Graphics Cards Video/Graphics Cards Power Supply Unit 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 Links • http://pcpartpicker.com/ Memory • Hard drive • RAM • More on this later .