The document discusses various computer input and output devices. It describes common input devices like keyboards, mice, microphones, digital cameras, and scanners that allow a user to enter data into a computer. It also outlines output devices such as monitors, speakers, and different types of printers that display information from the computer for the user.
Input devices
WHAT IS INPUT?
WHAT ARE INPUT DEVICES?
WHAT IS HARDWARE?
WHAT IS SOFTWARE?
input Devices
1) KEYBOARD
2) POINTING DEVICES
3) MOUSE
TYPES OF MOUSE
1. Mechanical mouse
2. Optical mouse
3. Wireless mouse
JOY STICK
TRACKBALL
TOUCHPAD
TOUCHSCREEN
DIGITAL PEN
LIGHT PEN
WHEEL
BIOMETRIC INPUT DEVICES
VOICE RECOGNITION
THUMB IMPRESSION
SIGNATURE VERIFICATION
RETINA SCANNER
FACE RECOGNITION
MIC/ HEAD PHONE
DIGITAL CAMERA
DIGITAL SCANNER
computer input and output devices. . keyboard , mouse , printer ,scanner, web cam , types of mouse , types of printer and scanner, difference between printer and scanner, microphone,digital camera , speaker ,projector ,moniter,projector types
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.
INPUT AND OUTPUT DEVICES.
A keyboard is an input device that sends information about the keys you press. This is received by the computer and it displays the correct letter or number. A monitor is an output device. It displays all the information that has been sent to it by input devices.
Input devices
WHAT IS INPUT?
WHAT ARE INPUT DEVICES?
WHAT IS HARDWARE?
WHAT IS SOFTWARE?
input Devices
1) KEYBOARD
2) POINTING DEVICES
3) MOUSE
TYPES OF MOUSE
1. Mechanical mouse
2. Optical mouse
3. Wireless mouse
JOY STICK
TRACKBALL
TOUCHPAD
TOUCHSCREEN
DIGITAL PEN
LIGHT PEN
WHEEL
BIOMETRIC INPUT DEVICES
VOICE RECOGNITION
THUMB IMPRESSION
SIGNATURE VERIFICATION
RETINA SCANNER
FACE RECOGNITION
MIC/ HEAD PHONE
DIGITAL CAMERA
DIGITAL SCANNER
computer input and output devices. . keyboard , mouse , printer ,scanner, web cam , types of mouse , types of printer and scanner, difference between printer and scanner, microphone,digital camera , speaker ,projector ,moniter,projector types
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.
INPUT AND OUTPUT DEVICES.
A keyboard is an input device that sends information about the keys you press. This is received by the computer and it displays the correct letter or number. A monitor is an output device. It displays all the information that has been sent to it by input devices.
This Document by Daroko blog,this describe the human computer interface in use today,to read More about Notes on human computer intrface,kindly go to daroko blog,this is ust a section of those notes,go to daroko blog and read all the Notes,check on the tutorials part on that blog and then choose human computer interafec
Abstract
Human–computer interaction is a discipline concerned with the design, evaluation and implementation of interactive computing systems for human use. The field formally emerged out of computer science, cognitive psychology and industrial design through the 1960s, formulating guidelines for the development of interactive computer systems highlighting usability concerns for improved interfaces. Computing devices are becoming more prevalent and integrated into both our social and work spaces.HCI therefore plays an important role in ensuring that computer systems are not only functional but also respect the needs and capabilities of the humans that use them.
HCI encompasses not only ease of use but also new interaction techniques. It involves input and output devices and the interaction techniques that use them; presentation of information, control and monitoring of computer’s actions and the processes that developers follow when creating interfaces. In this seminar, emphasis is laid on the movement of a user’s eyes which can provide a convenient, natural, and high-bandwidth source of additional user input. Some of the human factors and technical considerations that arise in trying to use eye movements as an input medium and the first eye movement-based interaction techniques are discussed in this section.
AYUSHA PATNAIK,
SEM - 6th
TRIDENT ACADEMY OF TECHNOLOGY,
BBSR
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This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
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8. The Keyboard
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.
8
9. Keyboard
• The keyboard allows the computer user to
enter words, numbers, punctuation,
symbols, and special function commands
9
into the computer’s memory.
10. The Mouse
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.
10
12. Touch screens
• Often used for applications with occasional
use, for example
• Bank ATMs, Information Kiosks, etc.
• No extra hardware - used for input and for
output
• Can be precise to 1 pixel
• Good for menu choice - not so good for
other functions
• Intuitive to use
14
13. Touch screens
• BUT
• Tiring if at wrong angle (needs to be 30-45%
from horizontal)
• Get greasy, jammy
• Finger can obscure screen
• Alternative - use stylus to touch screen, or
lightpen
15
14. Indirect Pointing Devices
• Need more cognitive processing than direct
methods, but can be more efficient
•
•
•
•
mouse
tracker ball
track point
touchpad…
16
15. Indirect pointing
devices - other
• Tracker ball,
trackpad, trackpoint
• Less space on
desktop
• Good in moving
environments, e.g.
car, train
17
16. Indirect pointing devices - other
• Joystick
• The main use of a joystick is to
play computer games by
controlling the way that
something moves on the
screen.
18
17. Microphones - Speech Recognition
•Use a microphone to talk to your
computer
•Add a sound card to your computer
•Sound card digitizes audio
input into 0/1s
•A speech recognition program can
process the input and convert it into
machine-recognized commands or
input
19
18. Audio Input: Speech Recognition
• Speech recognition is a
type of input in which the
computer recognizes words
spoken into a microphone.
• Special software and a
microphone are required.
• Latest technology uses
continuous speech
recognition where the user
does not have to pause
between words.
20
20. 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.
22
21. Scanner
A scanner can be used to input pictures and
text into a computer. There are two main types
of scanner; Hand-held and Flat-bed.
23
22. 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.
24
23. Bar codes
•A bar code is a set of lines of different thicknesses
that represent a number
•Bar Code Readers are used to input data from bar
codes. Most products in shops have bar codes on
them
•Bar code readers work by shining a beam of light
on the lines that make up the bar code and
detecting the amount of light that is reflected back
25
25. Output Devices: Engaging our Senses
• Output devices are peripheral devices that enable us to
view or hear the computer’s processed data.
– Visual output – Text, graphics, and video
– Audio output – Sounds, music, and synthesized
speech
28
27. Monitors
CRT
LCD
• A monitor is a peripheral device which displays
computer output on a screen.
• Screen output is referred to as soft copy.
• Types of monitors:
– Cathode-ray tube (CRT)
– Liquid Crystal Display (LCD or flat-panel)
30
28. Monitors
• CRT
– cathode ray tube
• electron gun shoots a stream of electrons at a specially
phosphor-coated screen
• on impact, the phosphor flares up for a fraction of a
second
• electron gun sweeps across the screen many times a
second
• LCD
– liquid crystal display
• one of several types of “flat-panel” displays
• forms output by solidifying crystals and “backlighting”
the image with a light source
– TV sets are CRTs and many desktop monitors
use this technology
– LCD is primarily used for laptops and other
portable devices
31
29. Video Display Terminology
• Pixel
– picture element (smallest unit of an
image, basically a single dot on the
screen)
• Resolution
– number of pixels in the image
– Common resolution size is
1024x768
– Refresh rate
• how often a CRT’s electron gun rescans
• LCD displays do not use an electron
gun, so do not perform refreshing
The CRT electron gun
“shoots” 3 electrons at
the screen representing
the amount of red, green
and blue for the pixel
32
30. Printers
• Ink Jet Printer
– least expensive, color, slower with a higher per page
cost than laser printers
• Laser Printer
– More expensive, faster, lower per page cost than ink
jet,
33
31. Printers
• A printer is a
peripheral device
that produces a
physical copy or
hard copy of the
computer’s output.
34
32. Types of Printers
Inkjet
• Inkjet printer, also called
a bubble-jet, makes
characters by inserting
dots of ink onto paper
• Letter-quality printouts
• Cost of printer is
inexpensive but ink is
costly
Laser
• Laser printer works like
a copier
• Quality determined by
dots per inch (dpi)
produced
• Color printers available
• Expensive initial costs but
cheaper to operate per
35
page
33. Plotter
• A plotter is a printer that uses a pen that
moves over a large revolving sheet of
paper.
• It is used in engineering, drafting, map
making, and seismology.
36
34. Audio Output: Sound Cards and
Speakers
• Audio output is the ability of the computer
to output sound.
• Two components are needed:
– Sound card – Plays contents of digitized
recordings
– Speakers – Attach to sound card
37