Presentation on input devices


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Presentation on input devices

  1. 1. Name:- Nitish Xavier Tirkey F.Y.BCA Date:- 4th October, 2010
  2. 2.  Introduction Types of Input Device
  3. 3.  Computer cannot understanding our language because it understands only machine language and it can be possible using some devices are called input devices When we work with computer we need to enter data and instructions to the computer using these devices These devices convert data and instructions to a form that can be recognized by the computer
  4. 4.  Keyboard Mouse Scanner Joystick Digital camera
  5. 5.  Keyboard is the most commonly used input devices. They allow data entry into a computer system by pressing a set of keys neatly mounted on a keyboard Contains some extra command keys and function keys that affect the operation of computer or keyboard itself Types of keyboard : (1). Standard keyboard (2). Multimedia keyboard (3).Wireless keyboard
  6. 6.  Mouse is the most popular point-and-draw device It is a must-have input device on modern personal computers Has 2 or 3 buttons and can be clicked or double-clicked to perform tasks Optical mouse doesn’t have a ball but uses a laser to sense the motion Types of mouse: (1). Serial mouse (2).PS/2 mouse (3).Optical mouse (4).Wireless mouse
  7. 7.  Data scanning devices are input devices used for direct data entry into a computer system from source documents Common scanner devices are: (1).Magnetic Ink Character Recognition (MICR) reader :- used by banks to process large volumes of cheques and drafts (2).Optical Mark Reader (OMR) scanner :- scanning the answer sheet of an objective type test in which answers are marked by darkening a square or circle space by pencil (3).Optical Character Recognition (OCR) scanner :- used for direct reading of any printed character (4).Barcode reader :- used to read the barcodes printed on practically every item purchased from a department store
  8. 8.  A joystick is a pointing device that works on the principle of trackball To make the movement of the spherical ball easier, it is placed in a socket with a stick mounted on it On most joysticks, a button on the top is provided to select the option currently pointed to by the cursor Commonly used for controlling player movements in video or computer games
  9. 9.  A computer with a vision-input device consists of digital camera The camera creates an image of the object in digital form so that It can be stored and interpreted by the computer The digitized image of the object is matched against similarly formed pre-stored images in the computer’s image database