This PPT dives the detailed information about Input and Output Devices

1. INPUT AND OUTPUT DEVICES
Prepared by
V.SANTHI
Assistant Professor,
Department of Computer Applications,
Thanjavur
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2. In computing an input device is a piece of
equipment used to provide data and control
signals to an information processing
system,such as a computer or information
appliance.
Input Devices

3. Examples of input device
► Keyboard
► Mouse
► Joystick
► Light pen
► Track ball
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4. 1. KEYBOARD
► Keyboard is the most common and very popular input
device which help to input
data to the computer.
► The layout of the keyboard is like to
traditional typewriter.
► 1o4 or 105 keys are available
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5. 2.MOUSE
► Mouse is the most popular pointing device.
►Generally it has two buttons called the left
and the right buttons
►A mouse can be used to control the position of
the cursor on the screen,but it cannot be used to
enter text into the computer.
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6. 3.JOYSTICK
► Joystick is also a pointing device which is used
to move the cursor position on a monitor screen.
► It is a stick having a special ball at its both
lower and upper ends.
► The lower sperical ball moves in a socket
► The joystick can be moved in all 4 direction.
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7. 4.LIGHTPEN
► Light pen is a pointing device similar to a Pen.
► It is used to select a displayed menu
item are draw picture on the monitor screen.
► It consists of a photocell and on
optical system placed in a small tube.
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8. 5.TRACKBALL
► A track ball is a computer cursor control device
used in many notebook and laptop computer.
► The track ball is usually located in front of the
keyboard toward user.
► Essentialy ,the track ball is a upside- down mouse
that rotates in place within a socket.
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9. Output devices:
► An output devices is a piece of computer
hardware that receive data from a computer and
then translate that data into another form.than
form may be audio , visual,textual,or hardcopy
such as a printed document
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10. Examples of output devices
► Monitor
► Printer
► Projector
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11. 1. MONITOR
► A monitor consists of a screen,circuitry,a power supply,buttons to
adjust screen
. setting and a casing that contains all of these
components
►A monitor display data from a computer
on to a screen so the user can interact
with the data via a digital interface
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12. 2.PRINTER
► The function of a printer is to create a
copy of whatever is sent from the computer to the printer.
► Printers take electronic data sent
from a computer and generate a hard copy.
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13. 3.PROJECTOR
►As it’s name suggest,
this output devices
‘ projects’computer images
are video
onto a wall or screen.
►Popular brands:BenQ,
sony,optima,epson
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