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Edp111 Finalsproject

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  • 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

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