The document discusses various computer input and output devices. It describes keyboards, mice, trackpads, trackballs, microphones, scanners, digital cameras, styluses, joysticks, and light pens as common input devices. Monitors, speakers, and printers are outlined as main output devices, with CRT and flat panel displays discussed for monitors. Impact and non-impact printers are also summarized.
An output device is computer hardware that uses received data and commands from a computer in order to perform a task.
Any peripheral that receives data from a computer, usually for display, projection, or physical reproduction.
Computer hardware equipment used to communicate the results of data processing carried out by a computer to the outside world.
Input and Output Devices of Computers (Powerpoint Presentation)Anjenette Columnas
A Powerpoint Presentation about Input and Output Devices of Computers in the Computer Subject. I'm now a professional teacher and this powerpoint presentation was used during my teaching demonstration in Sicayab National High School.
Importance of I/O devices,Types of input devices,keyboard
Pointing devices,Speech recognition,Digital camera
Webcam,Scanners,OCR,OMR,MICR,Bar-code reader
An output device is computer hardware that uses received data and commands from a computer in order to perform a task.
Any peripheral that receives data from a computer, usually for display, projection, or physical reproduction.
Computer hardware equipment used to communicate the results of data processing carried out by a computer to the outside world.
Input and Output Devices of Computers (Powerpoint Presentation)Anjenette Columnas
A Powerpoint Presentation about Input and Output Devices of Computers in the Computer Subject. I'm now a professional teacher and this powerpoint presentation was used during my teaching demonstration in Sicayab National High School.
Importance of I/O devices,Types of input devices,keyboard
Pointing devices,Speech recognition,Digital camera
Webcam,Scanners,OCR,OMR,MICR,Bar-code reader
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Input And Output Devices
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Students Of Birla Institute Of Technology,Patna Campus
Department: BBA Session 2016-2019
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peripheral device, also known as peripheral, computer peripheral, input-output device, or input/output device, any of various devices (including sensors) used to enter information and instructions into a computer for storage or processing and to deliver the processed data to a human operator or, in some cases, a machine controlled by the computer. Such devices make up the peripheral equipment of modern digital computer systems.
Peripherals are commonly divided into three kinds: input devices, output devices, and storage devices (which partake of the characteristics of the first two). An input device converts incoming data and instructions into a pattern of electrical signals in binary code that are comprehensible to a digital computer. An output device reverses the process, translating the digitized signals into a form intelligible to the user. At one time punched-card and paper-tape readers were extensively used for inputting, but these have now been supplanted by more efficient devices.
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Computer Input and Output Devices
1.
2. An input device is any hardware component that
allows you to enter data and instructions onto a
computer. Most Widely used input devices are
1. Keyboard
2. Mouse
3. Microphone
4. Scanner
5. Digital camera
6. Stylus
7. Joysticks
8. Light Pen
3. The most commonly used input device is the
keyboard on which data is entered by manually
keying in or typing certain keys. A keyboard
typically has 101 or 105 keys.
4. The keyboard allows the computer user to enter
words, numbers, punctuation, symbols, and special
function commands into the computer’s memory.
5. Is a pointing device which is used to control the
movement of a mouse pointer on the screen to
make selections from the screen. A mouse has one
to five buttons. The bottom of the mouse is flat and
contains a mechanism that detects movement of
the mouse.
6. Variants of the Mouse - Trackpads
• A trackpad is a touch-sensitive pad that provides the
same functionality as a mouse.
• To use a trackpad, you glide your finger across its
surface.
• Trackpads provide a set of buttons that function like
mouse buttons.
7. Variants of the Mouse - Trackballs
• A trackball is like a mouse turned upside-down.
• Use your thumb to move the exposed ball and your
fingers to press the buttons.
Many styles of
trackball are
available.
8. Scanner is a light sensitive device that helps you
copy or capture images, photos, and artwork
that exist on paper.
9. Digital camera
A digital camera can store many more pictures
than an ordinary camera. Pictures taken using
a digital camera are stored inside its memory
and can be transferred to a computer by
connecting the camera to it. A digital camera
takes pictures by converting the light passing
through the lens at the front into a digital
image.
10. Microphone is a input device
used to input audio to
Computer.
• Three main types of
microphones are:
Desktop microphones
Headsets
Directional microphones
11. Stylus is an input device consisting of a thin
stick that uses pressure to enter information
or to click and point
• Styluses are used with:
PDAs
Tablet PCs
Graphics tablets
12. The main use of a joystick is to
play computer games by
controlling the way that
something moves on the
screen.
13. Light pen
•A light pen is a small ‘pen-shaped’ wand,
which contains light sensors.
•It is used to choose objects or commands on
the screen either by pressing it against the
surface of the screen or by pressing a small
switch on its side.
•A signal is sent to the computer, which then
works out the light pen’s exact location on the
screen.
•The advantage of a light pen is that it doesn’t
need a special screen or screen coating.
14. An output device is any hardware component
that conveys information to one or more
people. Three commonly used output devices
are
1.Printer
2. Monitor
3. Speakers
15. Monitors, commonly called as Visual Display Unit
(VDU), are the main output device of a
computer. It forms images from tiny dots,
called pixels that are arranged in a rectangular
form. The sharpness of the image depends
upon the number of pixels.
There are two kinds of viewing screen used for
monitors.
Cathode-Ray Tube (CRT)
Flat- Panel Display
16. A CRT monitor contains millions of tiny red, green,
and blue phosphor dots that glow when struck by an
electron beam. Electron beam travels across the screen
to create a visible image.
In a CRT monitor tube, the cathode is a heated
filament.
The heated filament is in a vacuum created inside a
glass tube. The electrons are negative and the screen
gives a positive charge so the screen glows.
17. The flat-panel display refers to a class of video devices
that have reduced volume, weight and power
requirement in comparison to the CRT. You can hang
them on walls or wear them on your wrists. Current
uses of flat-panel displays include calculators, video
games, monitors, laptop computer, graphics display.
The flat-panel display is divided into two categories:
Emissive Displays - The emissive displays are devices
that convert electrical energy into light. Example are
plasma panel and LED(Light-Emitting Diodes).
Non-Emissive Displays - The Non-emissive displays
use optical effects to convert sunlight or light from
some other source into graphics patterns. Example is
LCD(Liquid-Crystal Device)
18. A speaker is a device that
produces computer output
as sound. Speakers are
common devices in
computer systems
Examples include:
• Built-in speaker
• Two-device set speakers
• Surround sound speakers
19. A printer produces a paper
copy of information
generated by a
computer.
There are two types of
printers:
Impact Printers
Non-Impact Printers
20. The impact printers print the characters by striking
them on the ribbon which is then pressed on the
paper.
Characteristics of Impact Printers are the following:
Very low consumable costs
Very noisy
Useful for bulk printing due to low cost
There is physical contact with the paper to produce
an image
These printers are of two types
Character printers
Line printers
21. Non-impact printers print the characters without
using ribbon. These printers print a complete page
at a time so they are also called as Page Printers.
These printers are of two types
Laser Printers
Inkjet Printers
Characteristics of Non-impact Printers
Faster than impact printers.
They are not noisy.
High quality.
Support many fonts and different character size.