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Module 1.3 Hardware

Module 1.3 Hardware. Contents. Introduction Input Output Storage Environmental and health issues Test and improve your knowledge Module Activities. Introduction. Hardware is all the things on a computer that you can physically touch. . Processing. Out put. Input. Storage. Input.

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Module 1.3 Hardware

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  1. Module 1.3 Hardware

  2. Contents Introduction Input Output Storage Environmental and health issues Test and improve your knowledge Module Activities

  3. Introduction Hardware is all the things on a computer that you can physically touch. Processing Output Input Storage

  4. Input What is input? Input is the data and instructions that are given to a computer.

  5. Input Mouse

  6. Input The keyboard The keyboard is the most commonly used input device. Shortcut keys F1 Esc () <E> () <D>

  7. Input Wireless mouse and keyboard Advantages of wireless devices: • Less clutter • No cords to get tangled • Wide range of movement Disadvantages of wireless devices: • Require batteries (to produce the wireless signal) • More expensive • Sometimes there’s interference with the wireless signal • Can easily be removed, stolen quickly and quietly

  8. Output • Output is whatever the computer produces to provide us with the results of its processing.

  9. Output Monitor Soft copy CRTMonitors LCD Flat-panel monitors consume less space • flicker less • consume less power • environmentally friendly

  10. Output Monitor Soft copy Flat panel (LCD) viewing angle viewing angle specification. Most monitors have a viewing angle of at least 160 degrees

  11. The size of a monitor • measured diagonally • in inches Output Monitor Soft copy LCD screens have a recommended resolution Resolution Size Response time A low specification time for high quality graphics and video

  12. Output Printers Hard copy Inkjet printers Laser printers • work like a photo-copier machine • expensive to buy • cheaper to run and more suited to printing large volumes • print faster • black and white and colour laser printers (more expensive) • spray microscopic dots of ink onto the paper • cheap to buy • expensive to run • produces good quality colour prints • slightly slower than laserprinters

  13. Output Printers Hard copy Connecting and using printers Printer Installation Changing the Default Printer Usb port

  14. Output Printers Hard copy Connecting and using printers Printer Queues • You can cancel, pause or restart the printing here

  15. Storage Non-volatile: Storage keeps its contents at all times Storage medium (CD) Storage device (CD/DVD-drive)

  16. Storage Storage capacities & = 1 byte A 4 • A kilobyte (KB) is 1024 bytes • A megabyte (MB) is 1024 KB • A gigabyte (GB) is 1024 MB • A terabyte (TB) is 1024 GB.

  17. Storage Hard drives In case: stores all programs and data External/portable: USB connected, gets power from PC

  18. Storage Flash disks External/portable: USB connected, gets power from PC Appears as another disk on PC

  19. Storage Ports on your computer Network ports FireWire ports

  20. Environmental and health issues Health concerns RSI: Repetitive Strain Injury To prevent RSI: Ergonomically designed keyboards

  21. Environmental and health issues Health tips for using computers • Sit correctly • Height of your seat and/or table • Lighting and ventilation/air circulation • Mouse and keyboard placements • Prevent eye strain • Regular breaks

  22. Environmental and health issues Tips on how to practice green computing • Switch off computers and devices you are not using • Avoid the senseless wasting of paper • Try and repair or upgrade hardware • Don’t just throw away ink and toner cartridges • Refill and reuse cartridges

  23. Test and improve your knowledge Overview of module

  24. Test and improve your knowledge Important terms and concepts

  25. Activity Activity Written Written

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