Input devices and types


Published on

  • Be the first to comment

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Input devices and types

  1. 1. Input Devices • Communication Skills Faizan Atteeq S3f13asoc0125
  2. 2. Information Process Structure Input Process Output
  3. 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. 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. 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. 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. 7. Manual
  8. 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. 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. 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. 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. 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. 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. 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. 15. AUTOMATIC
  16. 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. 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. 18. OMR Pattern
  19. 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. 20. Thank You For Precious Time