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Input devices and types

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Transcript

  • 1. Input Devices • Communication Skills Faizan Atteeq S3f13asoc0125
  • 2. Information Process Structure Input Process Output
  • 3. INPUT Input: Anything that is given to computer to process and convert into information is called input. e.g text, speech, video and digital signals.
  • 4. Input Devices Introduction to computer input devices  A device that can be used to insert data into a computer or other computational device  Any hardware device that sends data to the computer, without any input devices, a computer would only be a display device and not allow users to interact  Computer works with the commands an the input given by the user
  • 5. Input Devices Types of input devices: There are two types of input devices: 1. Manual Input:  Keyboard  Mouse  Track Ball  Joystick  Microphone  Digital Camera  Scanner
  • 6. Input Devices 2. Automatic Input:  MICR (Magnetic Ink Character Recognition)  OMR (Optical Mark Recognition)  OCR (Optical Character Recognition)  Barcode reader  Magnetic Stripe  Sensors
  • 7. Manual
  • 8. Keyboard Used to input text data into the computer Advantage  They are very common; all computers have one and they are easy to use. Disadvantage  Easy to make mistakes if you can’t type quickly.
  • 9. Mouse Enables you to control the movement of the on screen curser by moving it around a surface Advantage  Easy to learn to use  Accurate for selecting things Disadvantage  Need a flat space next to the computer.
  • 10. Track Ball Like an upside down mouse, you turn it with your hand to move the pointer on the screen • Advantage  Ideal for using when flat space next to computer is limited • Disadvantage  Not very easy to use.
  • 11. Joystick • Similar to a tracker ball in operation except you have a stick which is moved rather than a rolling ball. • Advantage  Faster than mouse and performs immediate action . • Disadvantage  Some people find them more difficult to use than mice.
  • 12. Microphone Used to input sound • Advantages  Some systems can understand most peoples voices with voice recognition software • Disadvantages  Some systems need to be trained to understand each different voice.
  • 13. Digital Camera Looks very similar to a traditional camera. However, unlike photographic cameras, digital cameras do not use film  Advantage  No film needed.  Images can be digitally manipulated  Disadvantage  Need to print out photographs
  • 14. Scanner Another way in which we can capture still images or text to be stored and used on a computer. • Advantage  Can input things from paper documents  With OCR software, text can be scanned in • Disadvantage  Images can take up a lot of memory space.
  • 15. AUTOMATIC
  • 16. MICR Stands for Magnetic Ink Character Recognition. Banks use them; the reader reads the numbers on a cheque. • Advantage  Read at 100% accuracy.. • Disadvantage  The reader and ink is expensive
  • 17. OMR Stands for Optical Mark Reader. Reads pencil marks on a specially designed form or document, e.g. on a lottery ticket. • Advantage  Fast and accurate way of inputting information. • Disadvantage  Only works if the marks have been made accurately and clearly.
  • 18. OMR Pattern
  • 19. Barcode reader A bar code reader uses a visible red light to scan and read the barcode. • Advantage  Any price change only needs to be changed on the computer system, not on each item. • Disadvantage  Does not reads if surface is reflective due to humidity or if oily.
  • 20. Thank You For Precious Time