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Edp111 Finalsproject

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Edp111 Finalsproject Presentation Transcript

  • 1. UNIT 1 COMPUTER BASICS LESSON 5 INPUT OUTPUT and STORAGE
  • 2. OBJECTIVES
    • Identify and describe the most common output devices.
    • Identify and describe the most common input devices.
    • Identify and describe storage devices.
    • Identify and describe how input and output devices are connected to the computer.
  • 3. INPUT AND OUTPUT DEVICES
    • Input devices enable a user to input data and commands to the computer to be processed.
    • Output devices enable the computer to give or show you the results of its processing.
    • Some devices can perform both input and output operations.
  • 4. INPUT DEVICES- KEYBOARD
    • The Keyboard
    • - is the most widely used input device.
    • -As you press keys on the keyboard, an electrical signal representing that key is sent to the computer.
    • -Keyboards are divided into sections.
  • 5. EXAMPLE OF A KEYBOARD
  • 6. INPUT DEVICES- KEYBOARD
    • Typewriter keys: The standard alphabetic and numeric characters you would find on a typewriter.
    • Function keys: Special keys that perform some specific function for the application being run.
    • Numeric keypad: Used for mathematical operations.
    • Directional keys: Used to move the cursor around the screen.
  • 7. INPUT DEVICES- MOUSE
    • The mouse is a pointing device that rolls around on a flat surface and controls the location of the pointer on the screen.
  • 8. INPUT DEVICES- MOUSE
    • The mouse performs the following functions:
      • Pointing: Placing the on-screen pointer at a specific place
      • Clicking: Pressing and releasing the mouse button
  • 9. INPUT DEVICES- MOUSE
      • Dragging: Holding down the mouse button and dragging an object to a new location by dragging the mouse
      • Double-clicking: Pressing and releasing the mouse button twice very quickly
      • Right-clicking: Pressing the right mouse button
  • 10. Other Pointing Devices
    • Other devices that control the on-screen pointer:
    • - Trackball: This is like a mouse turned upside down. You roll a ball around with your fingers to control the location of the pointer.
    • -These frequently are found on notebook computers.
  • 11. EXAMPLE OF A TRACKBALL
  • 12. Other Pointing Devices (cont.)
    • -Joystick and wheel: Joysticks consist of a metal or plastic handle mounted on a base that you can move in any direction to move the pointer or other object.
    • -These typically are used for video games.
    • -Most have buttons that can be pushed or clicked to control input/output.
  • 13. EXAMPLE OF A JOYSTICK & WHEEL
  • 14. Other Pointing Devices (cont.)
    • -Pointing stick: A pressure-sensitive device that resembles a pencil eraser; found mostly on notebook computers
    • -Graphics tablet: A flat drawing surface connected to the computer
    • -The user draws on the surface, and the figures or writing on the tablet can be input to the computer for processing
  • 15. EXAMPLE OF A GRAPHICS TABLET
  • 16. Other Pointing Devices (cont.)
    • - Touch display: Screens that contain pictures or shapes that the user can press to input that data
    • -Stylus/digital pen: Used with mobile devices to input data
    • - Touchpad: Used mostly in laptop/notebook computers
  • 17. EXAMPLE OF A TOUCH DISPLAY
  • 18. EXAMPLE OF A DIGITAL PEN
  • 19. EXAMPLE OF A TOUCHPAD
  • 20. Other Pointing Devices (cont.)
    • -Audio/voice input: Inputting sound and/or voice.
      • These usually require a microphone and special voice recognition software to be installed on the computer.
  • 21. EXAMPLE OF AN AUDIO/VOICE INPUT
  • 22. Other Pointing Devices (cont.)
    • Scanners: Devices that can convert a graphical image into a digital image and input it to the computer
      • Types of scanners include
        • Image scanners for scanning images and text
        • Bar code scanners to read product bar codes
        • Magnetic scanners to read the magnetic strip on a credit card
  • 23. EXAMPLE OF A SCANNER
  • 24. Other Pointing Devices (cont.)
    • Digital cameras: Used to take pictures and store them on a magnetic disk instead of on film
      • Their images can be input directly into the computer.
    • Video input: Input from a camcorder or VCR using video capture cards
  • 25. EXAMPLE OF A DIGITAL CAMERA
  • 26. Other Pointing Devices (cont.)
    • Biometric input: Uses
    • fingerprint, face,
    • handwriting, and
    • voice for identification
  • 27. Magnetic Storage Devices
    • Floppy disks: Small, portable
    • disks that hold a
    • limited amount of data
    • Hard disks: Large-capacity
    • and fast-access storage devices
  • 28. Magnetic Storage Devices (cont.)
    • Zip disks: Auxiliary storage devices
    • that can hold large quantities
    • of data and can be portable
    • Magnetic tape drives: Used
    • for making system backups and
    • storing large quantities of data
  • 29. Optical Storage Devices
    • CD-DA: Audio CD
    • CD-R: This drive allows you to read and to write to a compact disk.
    • CD-ROM: Can hold large amounts of data, but is read-only access.
    • CD-RW: Can be written on several times
    • DVD-ROM: Read-only DVD format
    • DVD-R: Similar to CD, but holds more data; read-only
    • DVD-RW: Can be written on several times
    • PhotoCD : Used for storing digital photographs on a CD
  • 30. Solid-State Storage Media
    • Non-volatile removable media
    • Miniature mobile media
      • Uses integrated circuits
    • USB flash drive
      • Connects to the computer
      • via a USB port
  • 31. Caring for Storage Media
    • To safeguard your data from damage, follow these tips when dealing with removable media:
      • Keep away from magnetic fields.
      • Avoid extreme temperatures.
      • Never try to disassemble the case.
      • Remove media from drive when not being used.
  • 32. Caring for Storage Media (cont.)
    • Tips for dealing with storage media (cont.)
      • Write-protect important data.
      • Hold optical disks at their edges.
      • Never remove the media from the drive if the access light is on.
      • Keep disks in a sturdy case when transporting them.
  • 33. Output Devices—Monitors
    • Monitors are used to display video output to a user.
    • Monitors may be monochromatic or color.
      • Monochromatic monitors display output in a single-color display.
  • 34. EXAMPLE OF A MONITOR LCD monitor PLASMA monitor
  • 35. Output Devices—Printers
    • Printers are used to create a hard copy of a document or image.
      • Printers vary by speed, quality, and price
    • The most popular types of printers are
      • Laser: Produce images using the same techniques as copier machines
  • 36. Output Devices—Printers (cont.)
      • Ink jet: Use fine nozzles to spray ink onto the page as the paper passes through
      • Dot matrix: Work similarly to a typewriter in that ink is transferred to the paper by some part of the printer striking a ribbon to transfer an image
  • 37. EXAMPLES OF PRINTERS
    • LASER INKJET DOTMATRIX
  • 38. Other Types of Output Devices
    • Speakers and headsets
    • Fax machines and fax modems
    • Multifunctional devices
    • Data projectors
  • 39. Connecting I/O Devices to the Computer
    • Input and output devices must be connected to the computer before they can be used.
    • Connecting I/O devices to the computer:
      • Plug the device into an existing socket or port on the back of the computer.
      • Install an expansion card with the port you need included on the back of the card.
      • Connect wirelessly.
  • 40. Summary
    • Input devices enable you to input data and commands into the computer.
    • The most common input devices are the keyboard and mouse.
    • Other types of input devices include trackball, joystick and wheel, pointing stick, graphics tablet, touch display screen, stylus, voice recognition devices, touchpad, scanner, digital camera, video input, and biometric input.
  • 41. Summary (cont.)
    • To maintain a permanent copy of data, you should store it on some type of storage medium.
    • The three categories of storage media are magnetic storage, optical storage, and solid-state storage.
    • Monitors and printers are examples of output devices.
  • 42. Summary (cont.)
    • Monitors produce soft copy.
    • Printers are used to produce a paper or hard copy of the processed result.
    • Criteria for selecting a printer include speed, print quality, and cost.
    • Input and output devices must be physically connected to the computer.
  • 43. Summary (cont.)
    • Some input devices communicate with the computer through a physical connection.
    • Wireless devices communicate with the computer through infrared or radio waves.
  • 44.
    • PHOTOS CURTESY OF YAHOO IMAGES