input output devices
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Powerpoint presentation of Input and Output DevicesTRANSCRIPT
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Input And Output Devices
RPL MAHESHWARI COLLEGE
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What is Input?
Any data or instructions used by a computer.
Input devicesKeyboards
Scanners
Digital Camera
Mouse
Joystick, Light Pen
Translates data into a form that the system unit can process.
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Keyboard
Keyboard is a typewriter style device, which uses an arrangement of
buttons or keys, to act as electronic switches.
Types of Keyboard:
Standard: Desktop computer keyboards, such as the 101 key US
traditional keyboards or the 104 key Windows keyboards, include numbers,
alphabetic characters and a variety of function keys.
Handheld: Handheld ergonomic keyboards are designed to be held like a
game controller, and can be used as such, instead of laid out flat on top of a
table surface.
Thumb sized: Smaller external keyboards have been introduced for
devices without a built-in keyboard, such as smart phones.
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Standard Keyboard
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Thumb Sized Keyboard Handheld Keyboard
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Scanner
Image scanner: For digitizes a two-dimensional image.
Barcode reader: For reads the data encoded in a barcode.
Scanner (radio): For searching and receiving radio broadcasts.
3D scanner: For digitizes the three-dimensional shape of a real object.
Scanner is an input device which scans the object
into the computer.
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Barcode Reader
A barcode reader (or barcode scanner)
is an electronic device for reading
printed barcodes. Like a flatbed
scanner, it consists of a light source, a
lens and a light sensor translating
optical impulses into electrical ones.
Additionally, nearly all barcode
readers contain decoder circuitry
analyzing the barcode's image data
provided by the sensor.
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Digital Camera
A digital camera (digicam) is
a camera that encodes digital
images and videos digitally and stores
them for later reproduction. Digital and
film cameras share an optical system,
typically using a lens with a variable
diaphragm to focus light onto an image
pickup device.
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Pointing Device
A pointing device is an input interface that
allows a user to input spatial (i.e., continuous
and multi-dimensional) data to a computer.
Common Pointing Devices:
†MouseMechanical
Optical
†Joystick
†Light Pen
†Stylus
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What is Output?
A display device is an output device that visually
conveys text, graphics, and video information.
Output Devices
Speakers
Screen (Monitor)
Printer
Projector
Plotter
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Speakers
Computer speakers, are speakers
external to a computer, that disable
the lower fidelity built-in speaker.
Computer speakers were introduced
by Altec Lansing in 1990.
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Screen (Monitor)
A monitor or a display is an electronic
visual display for computers. The monitor
comprises the display device, circuitry and
an enclosure. The display device in modern
monitors is typically a thin film transistor
liquid crystal display (TFT-LCD) thin
panel, while older monitors used a cathode
ray tube (CRT) about as deep as the screen
size.
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Printer
A printer is an external hardware
device responsible for taking
computer data and generating
a hard copy of that data. Printers
are one of the most used
peripherals on computers and are
commonly used to print text,
images, and photos.
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Projector
A projector is an optical device
that projects an image (or moving
images) onto a surface, commonly
a projection screen.
Most projectors create an image
by shining a light through a small
transparent lens, but some newer
types of projectors can project the
image directly, by using lasers.
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Plotter
The plotter is a computer printer for
printing vector graphics. A plotter
gives a hard copy of the output. It
draws pictures on paper using a pen.
Plotters are used to print designs of
ships and machines, plans for
buildings.
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Submitted To:
Nidhi Mam
Submitted By:
Prachi Chourasia
B.Com Tax
3rd Year