Int 2 peripherals 2010


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Int 2 peripherals 2010

  1. 1. Peripherals Mr Arthur
  2. 2. Aims of Lesson 1 <ul><li>To go over the Computer Structure test </li></ul><ul><li>Begin Unit 3 – Peripherals </li></ul><ul><li>Features of Input/Output Devices </li></ul>
  3. 3. 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
  4. 4. 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
  5. 5. Lesson Starter <ul><li>List 3 examples of Monitors </li></ul><ul><li>What input device controls the pointer on a laptop? </li></ul><ul><li>Give 2 features you would use to compare printers </li></ul>
  6. 6. Aims of Lesson 2 <ul><li>Last Lesson </li></ul><ul><li>Input/Output Devices </li></ul><ul><li>Today’s Lesson </li></ul><ul><li>Features of Backing Storage Devices </li></ul>
  7. 7. Backing Storage Media Type Capacity Features Floppy Disk Magnetic 1.44Mb Very low capacity – outdated Zip Disk Magnetic 100Mb-800Mb Compressing files for storage Hard Disk Magnetic 100Gb – 1Tb Very fast data transfer rate Tape Magnetic 1Tb – 100Tb High Capacity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
  8. 8. Lesson Starter <ul><li>What is the name of the Magnetic storage media that compresses files? </li></ul><ul><li>What is the difference between a DVD ROM, DVD-R and DVD-RW? </li></ul><ul><li>Suggest a suitable storage media to store a backup copy of Photographs from a wedding that is 16Gb </li></ul>
  9. 9. Aims of Lesson 3 <ul><li>Last Lesson </li></ul><ul><li>Input/Output Devices </li></ul><ul><li>Features of Backing Storage Devices </li></ul><ul><li>Today’s Lesson </li></ul><ul><li>Functions of an Interface </li></ul>
  10. 10. Interface <ul><li>An interface is a piece of hardware positioned between a peripheral and the CPU. The interface compensates for any differences </li></ul><ul><li>Functions </li></ul><ul><ul><li>The interface compensates for the difference in speed between the processor and peripheral (Processor runs much faster) </li></ul></ul><ul><ul><li>Analogue to Digital Conversion (Microphone – Processor) </li></ul></ul><ul><ul><li>Interface may temporarily store data, for example, the buffer in the printer </li></ul></ul>
  11. 11. Arrangements <ul><li>Description of the features, functions and uses of the following input devices: keyboard, mouse, microphone, touchpad, digital camera, scanner, webcam </li></ul><ul><li>Comparison of input devices using appropriate characteristics including resolution </li></ul><ul><li>capacity, speed of data transfer, cost </li></ul><ul><li>Description of the features, functions and uses of a monitor, LCD panel, inkjet and laser printers, loudspeakers </li></ul><ul><li>Comparison of output devices using appropriate characteristics including resolution, </li></ul><ul><li>capacity, speed of data transfer, cost </li></ul><ul><li>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 </li></ul><ul><li>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 </li></ul><ul><li>Comparison of storage devices using appropriate characteristics including type of access, capacity, speed of data transfer, cost </li></ul><ul><li>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 </li></ul>