Int 2 peripherals 2010
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Int 2 peripherals 2010

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Int 2 peripherals 2010 Int 2 peripherals 2010 Presentation Transcript

  • Peripherals Mr Arthur
  • Aims of Lesson 1
    • To go over the Computer Structure test
    • Begin Unit 3 – Peripherals
    • Features of Input/Output Devices
  • Input Devices Device Features Cost Keyboard Entering text £5-£50 Mouse Control the pointer £3-£30 Touchpad Control the pointer on a laptop Microphone Enter Sound £10-£50 Digital Camera Input Images (Resolution measured in Megapixels) £50-£1000 Scanner Input paper images (Resolution 600-4800dpi) £30-£200 Webcam Video conferencing £10-£200 View slide
  • Output Devices Device Features Cost Liquid Crystal Display Monitor Low power flat screen used for palmtop and laptop <£100 Thin Film Transistor Monitor More Expensive flat screen <£200 Cathode Ray Tube Monitor Bulky Monitor Inkjet Printer Squirts ink on to page. High Quality photo printing £50-£1000 Laser Printer Uses electric charge and toner dust (very fast) £100-£1000 Loudspeaker Used to output sound £10-£80 View slide
  • Lesson Starter
    • List 3 examples of Monitors
    • What input device controls the pointer on a laptop?
    • Give 2 features you would use to compare printers
  • Aims of Lesson 2
    • Last Lesson
    • Input/Output Devices
    • Today’s Lesson
    • Features of Backing Storage Devices
  • Backing Storage Media Type Capacity Features Floppy Disk Magnetic 1.44Mb Very low capacity – outdated Zip Disk Magnetic 100Mb-800Mb Compressing files for storage Hard Disk Magnetic 100Gb – 1Tb Very fast data transfer rate Tape Magnetic 1Tb – 100Tb High Capacity but very slow transfer rate CDROM Optical 700Mb Contents written at manufacture CD-Recordable Optical 700Mb User can store to once then becomes ROM CD-ReWriteable Optical 700Mb Contents can be written a number of times DVD-ROM Optical 4.7Gb Faster transfer than CD DVD-R/RW Optical 4.7Gb USB Memory Stick Magnetic 1Gb-32Gb Very portable
  • Lesson Starter
    • What is the name of the Magnetic storage media that compresses files?
    • What is the difference between a DVD ROM, DVD-R and DVD-RW?
    • Suggest a suitable storage media to store a backup copy of Photographs from a wedding that is 16Gb
  • Aims of Lesson 3
    • Last Lesson
    • Input/Output Devices
    • Features of Backing Storage Devices
    • Today’s Lesson
    • Functions of an Interface
  • Interface
    • An interface is a piece of hardware positioned between a peripheral and the CPU. The interface compensates for any differences
    • Functions
      • The interface compensates for the difference in speed between the processor and peripheral (Processor runs much faster)
      • Analogue to Digital Conversion (Microphone – Processor)
      • Interface may temporarily store data, for example, the buffer in the printer
  • Arrangements
    • Description of the features, functions and uses of the following input devices: keyboard, mouse, microphone, touchpad, digital camera, scanner, webcam
    • Comparison of input devices using appropriate characteristics including resolution
    • capacity, speed of data transfer, cost
    • Description of the features, functions and uses of a monitor, LCD panel, inkjet and laser printers, loudspeakers
    • Comparison of output devices using appropriate characteristics including resolution,
    • capacity, speed of data transfer, cost
    • Magnetic storage: description of the features, functions and uses of current magnetic storage devices and media including floppy drive, hard drive, zip drive, magnetic tape drive
    • Optical storage: description of the features, functions and uses of current optical storage devices and media including CD-ROM, CD-R, CD-RW, DVD-ROM, rewritable DVD
    • Comparison of storage devices using appropriate characteristics including type of access, capacity, speed of data transfer, cost
    • Description of the need for interfaces with reference to the following functions: compensating for differences in speed between the CPU and peripherals, data conversion from analogue to digital forms and temporary data storage