Thursday, 27 October 2011

Input/Output Devices


Input Devices

MOUSE
  • A mouse is a pointing device that consists of an object held under one of the users hands with one or two buttons and a scrolling wheel.
  • The mouse's motions translates into a motion of cursor on a display.
KEYBOARD

The keyboard remains the most commonly used for direct  input into computers
A keyboard has characters engraved or printed on the keys and each press of a key corresponds to a single symbol
Most keyboard keys produce letters, numbers or signs, others keys produce actions or commands



WEBCAM



Tablet




  • A tablet allows users to create and draw images, watch videos play games listen to music.
  • The tablet is usually used by business men.


                Microphone


  • A microphone converts sounds into electrical waves.
  • Microphones are used in telephones, kareoke systems, tape recorders etc. For webcam it is essential to have a microphone so you can talk to the person you are sharing the webchat with and so that the person can hear you.


      
A  webcam is a camera that is connected to a computer, either directly or wirelessly
                    
              
                 Webcam
      
  • They are known for their low costs and flexibility
  • They can be used for business and pleasure.


         TOUCH SCREEN
 
A Touch Screen is a visual display that can detect the presence and location of a touch within the display area.
It works by touching the screen with a finger or hand.
             SCANNER
 A scanner is a device that scans images, printed text, handwriting or an object and changes it to a digital image.
    GAMES CONTROLLER
A games controller is used with games or entertainment  systems used to control an object or character. 
http://www.youtube.com/watch?v=9MOIkSceV6k


         Output Devices

                   Printer
  • A printer is able to print the data stored in a computer it is connected to.
  • It can print documents, pictures and graphics usually on paper.
  • It is connected to a computer through a USB device.
  • Your images or data can be printed in black or colour depending on ur printer.

                    
Monitor
  • A monitor is a screen that displays output from a computer.
  • It allows the user to see programs they are vieweing on the computer.
  • It shows images, videos, animations and graphics.


            
Sound
  • Speakers are already installed into your computer but have low quality sound.
  • You can purchase better speakers and plug them into your computer for better clearer sound.
  • Speakers features usually consist of a LED pwer indicator, a headphone jack, controls for volume and a remote volume control.

No comments:

Post a Comment