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Computer Input Devices

Input devices are those devices with the help of which the user interacts with the computer. with the help of input devices, the user enters the data or information into the computer. The Central Processing Unit (CPU) of a computer receives the input and processes it to produce the output.
Some of the popular input devices are:
  • Mouse
  • Keyboard
  • Scanner
  • Microphone
  • Joystick
  • Digitizer
  • Light Pen
  • Touch Pad
  • Remote
  • Touch screen
  • Webcam
  • Biometric Devices
  • Optical Character Reader (OCR)
  • Digital Camera

    • Mouse :-

    A mouse is a input device which is used to move cursor or pointer across the screen. and it has left, and right buttons and a scroll wheel between them. when you click mouse button it send instruction to the computer. It also consists of a sensor inside which notifies its speed to the computer and according to which the cursor is moved on the screen.
    The mouse was invented by Douglas C. Engelbart in 1963. Early mouse had a roller ball integrated as a m

    ovement sensor underneath the device. Modern mouse devices come with optical technology that controls cursor movements by a visible or invisible light beam. A mouse is connected to a computer through different ports depending on the type of computer and type of a mouse.

    Types of mouse :-

  • Trackball Mouse :- It is a input device that has ball mechanism to move the pointer or cursor on the computer screen. The ball is half inserted in the device and can be easily rolled with finger, thumb or the palm to move the pointer on the screen. The device has sensor to detect the rotation of ball.
    Trackball Mouse
  • Mechanical Mouse:- It has a system of a ball and several rollers to track its movement. It is a corded type of mouse. A mechanical mouse can be used for high performance. The drawback is that they tend to get dust into the mechanics and thus require regular cleaning.
    Mechanical Mouse
  • Optical Mouse:- An optical mouse uses optical electronics to track its movement. It is more reliable than a mechanical mouse and also requires less maintenance.
    Optical Mouse
  • Cordless or Wireless Mouse:- this type of mouse lacks cable and uses wireless technology such as IrDA (infrared) or radio (Bluetooth or Wi-Fi) to control the movement of the cursor. It is used to improve the experience of using a mouse. It uses batteries for its power supply.
    Wireless Mousee

    • Keyboard:-

    The keyboard is a basic input device that is used to enter data into a computer or any other electronic device by pressing keys. It has different sets of keys for letters, numbers, characters, and functions. Keyboards are connected to a computer through USB or a Bluetooth device for wireless communication.
    Wireless Mousee

    Scanner :-

    The scanner uses the pictures and pages of text as input. It scans the picture or a document. The scanned picture or document then converted into a digital format or file and is displayed on the screen as an output. It uses optical character recognition techniques to convert images into digital ones.
    Wireless Mousee







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