Input and Output Devices

Topic: 

            Input and Output

            Devices

   

žDo you ever notices how information gets into your computer and how comes out in a form you can use? It is possible with the help of  I/O devices..

(1)Input Devices:

      Def; An Electronicdevice that can be used to enter data and Instructions in to a Computer.. 

(a)Keyboard

žA keyboard is a human interface device which is prepared as a layout of button or keys..It has features As

žTypewriter keyboard with numeric keypad

žSpecial purpose keys

žToggle and combination keys

(b)Mouse

žIt is an input device. it is an pointing device used to select various options.

žMouse can be used to control and manipulate cursor movement on monitor..

(c)Joystick

žJoystick is pointing device mostly used for playing games.

žThis is used to control the actions in a computer game

žIt consist of a lever used to move the pointer on the screen and buttons used to select options.

(d)Scanners

žScanners can be used to copy the image or text on paper into a digital format that can be used.

(e)Bar code reader

žA bar code reader is an electronic device which is used for reading  printed barcodes. This device directs a light beam across The Bar Code while it measures.

(f)Microphones

žThese record the analog sound and convert it into digital form for further processing. 

(g)Digital camera

žIt can be used to entering full motion recording into a computer. 

(2)Output Devices

žOutput devices can be used to receive information from the Computer. 

(a)Monitor

žDef; A monitor is peripheral device which displays computer output on a screen,

(b)Printers

žDef:A Printer is a peripheral device that used to produce hard copy or permanent record of computer’s output.

žThere are two types of Printers

     (1)Impact Printers

    (2)Non-Impact Printers 

(d)Plotters

žDef:A Plotter is an output device that used to produce high quality graphics in veriety of colors..

žThere two types of plotter

   (1)Flatbed Plotter

   (2)Drum Plotter 

(d)Audio output devices

žDef: Audio Output Devices can be used to translates audio information from the computer into sounds that people can understand.

žCommon Audio Output devices

          (1)Speakers

          (2)Headphones

(e)Projector

žDef: Projector can be used to displays computer information on big screen..

žIt is used for showing photograhic slides..

žThese mostly used in educational and other institutional settings.