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Theme 1: Let’s start with the basics

Theme 1: Let’s start with the basics. Lesson 8: Basic I/O devices – Storage devices and media. Ch 1.2 Hardware P 55 - 68. P 55. Basic input/output devices Mouse (input). Optical mouse No mouse pad necessary Can be used on any surface, as long as it is not reflective

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Theme 1: Let’s start with the basics

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  1. Theme 1: Let’s start with the basics Lesson 8: Basic I/O devices – Storage devices and media Ch 1.2 Hardware P 55 - 68

  2. P 55 Basic input/output devicesMouse (input) • Optical mouse • No mouse pad necessary • Can be used on any surface, as long as it is not reflective • Does not need cleaning or maintenance • Ball mouse • Needs a mousepad • Flat regular surface • Rollers prone to getting dirty • Must be cleaned regularly Instructions can be given with the mouse by double-clicking, right-clicking, dragging and scrolling with the wheel

  3. P 58 Basic input/output devices Keyboard (input)

  4. P 58 Basic input/output devices Shortcut keys with keyboard • <Alt><F> - display all the options under the File menu – use on main menu with <alt>-key • F1 – help • Esc – lets you get out of an option • <Windows><E> - opens Explorer • <Windows><D> - displays the desktop • <Ctrl><X>, <Ctrl><C>, <Ctrl><V> - Cut, Copy, Paste • <Ctrl><B>, <Ctrl><U>, <Ctrl><I> - Bold, Underline, Italic • <Ctrl><A> - selects whole document • <Ctrl><S> - save • <Ctrl><Z> - undo en

  5. P 59 Basic input/output devices Print Screen • Press ‘Print Screen’ key on keyboard. • Open Paint • Edit, Paste (<Ctrl><V>) • Use select to select a part of the picture • Copy this section to Word or Paint • With Format, Picture more formatting can be done on this picture.

  6. P 59 Health Issues Terminology • Carpal tunnel syndrome – inflammation of the wrists • Repetitive strain injury (RSI) – Injuries resulting from fast, repetitive work • Ergonomics – study of people in their work environments

  7. Health Issues Stay healthy by: • Sitting correctly • Keep wrists in the correct position • Take regular breaks • Look away from the screen regularly to give your eyes a break • Set the colour, brightness and contrast of the screen to a comfortable level for your eyes

  8. Activity 4 Apply Activity 4 P 60

  9. P 60 Cordless devices DIFFERENCES Bluetooth • Uses radio waves • Devices do not need to be in line of sight, but within 10m of one another Infrared • Uses infrared light waves • Devices must be in line of sight and not further than 2m SIMILARITIES • Uses sensor attached to the computer to receive signals of the device. • Device uses battery to send out signal. (Disadvantage) • Cordless devices is more expensive than those with cables

  10. P 61 Basic input/output devices Screen (output) • The image is created by the video card inside the computer • The brightness and sharpness are determined by the resolution – number of picture elements (pixels) • We use software to change the size and the quality of the image

  11. P 61 Basic input/output devices Screen (output) CRT • Large, bulky and looks like a TV screen LCD • Flat and looks like a laptop screen

  12. CRT Cheaper than LCD Takes up more space than LCD CRT screen flicker to refresh the image LCD More expensive than CRT Takes up less space than CRT LCD screen do not flicker Basic input/output devices Screen (output)

  13. Activity 5 Explore Activity 5 P 62

  14. P 62 Basic input/output devices Printer (output) Inkjet Laser Dot matrix

  15. P 62 Basic input/output devices Printer (output) Inkjet • Sprays microscopic dots of ink onto paper • Relatively cheap • More expensive to use. • Produces good quality prints • Slightly slower than laser printers Laser • Works like a photo-copier machine • Quite expensive to buy • Cheaper to use than inkjets • Prints faster than inkjet printers • Colour laser’s quality is not as good as the inkjet printer’s and is very expensive Dot matrix • Work by hitting pins against the paper through a inked ribbon • Produces carbon copies • Lowest quality printouts • Cheapest to run

  16. P 63 Environmental issues Prevent wastage and pollution • Prevent senseless paper wastage by proofreading on the screen. • Read and correct complete document before making final copy. • Send ink cartridges back to manufacturers for re-use or dispose in an environmentally friendly manner.

  17. Activity 6 Checkpoint Activity 6 P 63

  18. P 64/65 Storage devices and media, Hard drives Right-click on driver and use Properties to view information on storage space Look in My Computer to view all the drivers

  19. Activity 7 Explore Activity 7 P 64

  20. Activity 8 Explore Activity 8 P 66

  21. P 66 Storage devices and media, CD-ROM / CD-writer / DVD / DVD-writer • Optical drives uses laser technology • Most popular medium for distribution of software • ROM – can only read • R or RW – can read and write • 4. Standards for writing of DVDs can differ, make sure that you buy the blank disk that suits your drive • Dos and don’ts: • Be careful of scratch marks • Wash with water and wipe from inside to outside and not in circular movement • Advantages: • Cheap • Compatible • Large storage capacity

  22. P 67/68 Disks Keep away from magnets. Do not place heavy objects on disks. Keep away from extreme temperatures. Write on the label before sticking it on the disk. Only remove disk from drive after the light goes off. Always put in cover. Rather use a flash disk, CD or even e-mail. Flash disks Flash disks is smaller than disks. More reliable. Have larger storage capacity (32MB to 2GB). Data is transferred faster. Uses USB-port. Windows XP recognizes flash disks automatically. Storage devices and mediaDisks and Flash disks

  23. Activity 9 Apply Activity 9 P 68

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