Used to digitize images or video from the outside world into the computer. Digital camera Webcam Media players Hardware peripheral that allows computer users to input audio into their computers MIDI information is sent to a computer that is capable of reproducing an array of digital sounds that resemble traditional analog musical instruments.

2. INPUT DEVICES
Hardware device that sends data to a computer, allowing
you to interact with and control the computer.
Input device Memory
Output
device

3. VIDEO DEVICES
 Used to digitize images or video from the outside
world into the computer.
Digital camera
Webcam
Media players

4. WEBCAM
 A webcam is a hardware camera connected to a computer.
 captures a video image of the scene in front of it.
 Either built in or connected through USB.
 Digital cameras can also be connected to a computer to transfer
photos and videos.
 Most digital cameras do not directly input data into a computer - they
store photographs on memory cards.

5. MEDIA PLAYERS
 Devices that play any sort of media.
Phyisical
MP
VCRs
DVD
players
Blu-ray
players
DMP
Netflix
DVRs
Roku

6. SCANNER
 A device that ‘scans’ images, book pages, etc.
The scanned image data is passed to the computer.

7. AUDIO INPUT DEVICES
 Allow a user to send audio signals to a computer for
processing, recording, or carrying out commands.
 Microphone – MIDI keyboard

8. MICROPHONE
 Hardware peripheral that allows computer users to
input audio into their computers
 MIDI information is sent to a computer that is
capable of reproducing an array of digital sounds
that resemble traditional analog musical
instruments.

9. POINTING AND DRAW
DEVICES

10. •Hardware input device which allows the user
to move the mouse pointer,
• Examples of pointing devices are computer
mouse, trackball,light pens,touchpad,and
even the keyboard.
•A pointing device is an external tool that is
used to move objects around and also to
select options from menus.

11. PEN
The pen lets you draw on what is called a
digitizing tablet that mirrors the surface
area of the computer screen.The pen can
be used as a standard mouse (without
wires connected to it) or also as a free
flowing drawing device.The pen is useful
for drawing since drawing,graphics with a
mouse tends to be somewhat difficult.

12. Mouse
The mouse is a hand held device
that lets you point to and selected
icons on your screen. In a PC
mouse there are mostly 2-3
buttons and on a Mac there is a
one. A ball under the mouse
senses movement to ensure
smooth motion your should
remove the ball and clean it
regularly.
Keyboard
One of the main input or point and
draw device used on a computer, a
PC ‘s keyboard looks very similar
to the keyboards of electric
typewriters,with some editional
keys.Below is a graphic of the
Saitek gamers keyboard with
indicators pointing to each of the
major portions of the keyboard.

13. CORDLESS MOUSE
The cordless mouse is a lot
better than a normal mouse
thus by reducing the clutter of
the work needed to move the
mouse around.When you
move the mouse it sends an
infrared beam to a sensor
which interprets it causing it to
a
Move.
TRACKBALL
Tom Cranston and
Fred Longstaff,
Ferranti Canada.
Developed a
trackball for use in
DATAR
computer.The
trackball is an
upside down mouse
that remains
stationary on your
desk. same as
mouse except that
the rollers are
reversed

14. TOUCHPAD
The touchpad has sensors that sensor
touch when thy sensor touch they send a
signal to the computer to move the
mouse pointer to that location on the
screen
JOYSTICK
The joystick allows the
user to move quickly in
computer games light pen-
the light pen system
allows the user to touch
the computer screen with
a lighted pen to activate
commands and make
selections.

15. LIGHT PEN
The light pen system allows
the user to touch the
computer screen with a
lighted pen to activate
commands and make
selections.
TOUCH
SCREEN
The touch
screen lets the
user touch the
area to be
activated by
using the finger
or hand.

16. Keyboard and Data Scanning devices

17. WHAT IS KEYBOARD?
 Primary input devices used with a computer that looks similar to
electric typewriters, but with some additional keys.
 Allows the user to input letters,numbers, and other symbols that
often function as commands.

18. HISTORY
 Typewriters are called as definite ancestors of all key-based
text entry devices.
 The computer keyboard drives from the utility of two devices
1. Teleprinters (or teletypes)
2. KeypuncheS
 For the very first time Frank Pearne started working on
telepronters,later on it is developes in 1907-1910by
american mechanical engineer Charles Krum and his son
Howard.
 In 1930 Herman Hearth developed the first key punch
device.
 From the 1940s until the late 1960s, typewriters were the
main means of data entry and output for computing.
 Keyboards remain central to human-computer interaction to
the present, even as mobile personal computing devices
such as smartphones.

19. OVERVIEW OF KEYBOARD

20. TYPES OF KEYBOARD
Lap
Laptop keyboards
The size of the notebook keyboard, which is always
smaller by and not including control keys or a keypad.
Smartphone and tablet keyboards
Most of today's smart phones and tablets do not
have a physical keyboard use a thumb keyboard or on-
screen keyboard to type messages using their thumbs or
other fingers.

21. SCANNER
 A device that scans documents and converts them
into digital data.

22. COMMON TYPES OF SCANNER
FLAT –BED SCANNER
 Looks like a
photocopy machine.
 Has a box with a glass
plate on the top and a
lid.
 Document to be
scanned placed on a
glass plate.
 A light source below
the glass plate moves
from 1 line to the
another and scan all
lines.
 Take few seconds to
scan.

23. HAND HELD SCANNER
 Contain LED’s and can
be held in hand
 To scan dragged slowly
over the document from
one end to another
 Has to be dragged very
slowly.
 Used only when high
acuuracey is not needed.
 Cheeper then a flatbed
scanner.
 Used when volume of
documents to be
scanned is low

24. OTHER TYPES OF SCANNER
 OMR-OPTICAL MARK
READER
 Bar code reader

25.  MICR-Magnetic Ink
Character Recognition
 DIGITIZER
 ELECTRONIC CARD
READER

27. OUTPUT
 The information generated after processing data is
called output.
There is different type of output.
 Soft copy output
 Hard copy output

28. OUTPUT DEVICES
 Output devices are hardware component, attached
with computer.
 They take information from computer and convert it
in the form understandable by user. The commonly
used output devices are:
 Monitor
 Printer
 Plotter
 Speaker

29. WHAT IS A MONITER/DISPLAY SCREEN?
CRT Monitors
Flat Screen

30. MONITOR/DISPLAY SCREEN
 Display screen is most common output devices. It is
also called Monitor or simply screen.
 It is used to display output as soft copy.

31. CONT…
Size:
 Display screen are available in different size. The
size of a display screen is measured diagonally
from one corner to another. The common sizes of
display screen are from 13 to 22 inches.
Color:
There are two types of display screens.
 Monochrom
 RGB

32. CONT…
 Monochrome:
 This display screen uses two colors one as
background and others as foreground to display
text, images, graphics etc.
 It is commonly called black and white display
screen.
 RGB:
 This is color display screen.
 RGB stands for Red, Green, and Blue. Different
combinations of these colors are used to display
color images on the screen.

33. TYPES OF DISPLAY SCREEN
There are two types of display screen.
 Cathode Ray Tube(CRT)
 Flat Panel Display.

34. CRT MONITOR:
 It is most common form of display screen. It looks
like a TV screen.
 CRT is a vacuum tube.
 There are one or more electron guns at the end of
tube.
 CRT electron gun converts bits in to beam of
electrons. When beam of electrons hits the
phosphor dots they glow.
 The combined effect of these dots generates an
image on the screen.

36. FLAT PANEL MONITOR
 Flat panel monitor is lightweight, take less space
and consume less power than CRT monitor.
 Laptop computer uses flat panel monitor. Flat Panel
Monitor can also be used with personal computer.
 Flat Panel Monitor is made up of two glass plates.
There is a substance between two glass plates.
This substance is activated in different ways. There
are three types of flat panel display screen.

37. TYPES OF FLAT PANEL
 LCD
 ELD
 Gas Plasma Display

38. CONT…
LCD:
LCD stands for Liquid Crystal Display. LCD uses liquid crystal between
the glass plates. The molecules of liquid crystal line up in such a way
that light behind the screen is blocked or allowed through to create
images.
ELD:
ELD stands for Electronic Luminescent Display. It contains a substance
between two glass plates. This substance glows when electric current
charges it.
Gas Plasma Display:
These monitors use gas plasma technology. There is a layer of gas
between two glass plates. This gas glows when electric charges is
supplied. This technology offers large screen size and higher display
quality.

39. PRINTERS AND
PROJECTORS
39

40. 4
0
PRINTER
ITS TYPES, WORKING AND
USEFULNESS

41. 4
1
Printers
Impact Printers Non-Impact Printers
Daisy
wheel
Dot-
Matrix
Inkjet Thermal Laser

42.  An external hardware device responsible for taking
computer data and generating a hard copy of that data.
 Printers are one of the most commonly used peripherals
and they print text and still images on the paper.
4
2
WHAT IS A PRINTER?

43. “IMPACT PRINTER”
 These printers have a
mechanism that touches
the paper to create an
image.
 These printers work by
banging a print head
containing a number of
metal pins which strike
an inked ribbon placed
between the print head
and the paper.
An impact printer showing details
of print head.
43

44. “NON-IMPACT PRINTERS”
 These printers create an
image on the print medium
without the use of force.
 They don’t touch the paper
while creating an image.
 Non-impact printers are
much quieter than impact
printers as they don’t strike
the paper. A non-impact printer
44

45. PROJECTORS

46. WHAT IS A PROJECTOR?
It is an electronic device used to project
rays of light, especially an apparatus
with a system of lenses for projecting
images or film onto a screen.
46

47. • LCD
• DLP
• CRT
THE MAIN TYPES OF PROJECTORS

48.  Liquid Crystal Display
 3 different LCD glass panels for Red, Blue,
Green(These transfer the image signal to the to
projector.
 Cheap home theatre option
LCD

49.  DLP Optical semi-conductor called a DMD chip(Digital
micro mirror device)
 Consists of millions of mirrors, that work at 10 different
degrees in angles.
 DMD chips can produce 1024 shades of grey.
DLP

50.  Cathode Ray tube- three tubes commonly called
guns, These 3 tubes combine colors to create the
image.
 Low picture brightness quality
 Very cumbersome in size
 Can be tuned and refined to a great picture
quality.
CRT

51. PLOTTERS

53. PUNCHED CARDS
 Punched cards, popularly known as IBM cards, were the
dominant input device prior to the introduction of personal
computers.
 Punched cards use a Hollerith code, named after its inventor,
Herman Hollerith (1860–1929).
 Each card has eighty columns with one character per column;
therefore each punched card holds eighty characters or
exactly one row of text or characters a unit record.

54. COMPUTER PROGRAMMING IN THE PUNCHED
CARD ERA
Invention:
 From the invention of computer programming languages up to the
mid-1980s, many of not most computer programmers created, edited
and stored their programs line by line on punched cards.

55. HOW DOES IT WORK
?
•A punched card is a flexible write-once
medium that encodes data, most
commonly 80 characters.
•Users could create cards using a desk-
sized keypunch with a typewriter-like
keyboard.
•A typing error generally necessitated re-
punching an entire card.
•The editing of programs was facilitated by
reorganizing the cards, and removing or
replacing the lines that had changed;
programs were backed up by duplicating
the deck, or writing it to magnetic tape.

56. SPEAKERS & HEADPHONES

57.  Uses: Headphones are a pair of small loudspeakers that
are designed to be held in place close to ears.
 They are also known as ear speakers, ear phones, cans
and ear buds
HEAD PHONES

58.  1910 – Nathaniel Baldwin began
manufacturing the first modern
headphones
 1937 – The DT-48’s from Beyer
dynamic became the first dynamic
headphones to hit the market
REVLOUTION OF HEADPHONES

59.  1949 – With design in mind, AKG
produced their first pair of headphones,
the K120’s. If they were reproduced
today, they would sell like hotcakes at
Urban Outfitters
 1958 – John C. Koss changed the
headphone game. In 1958, Koss
created the first stereo headphones
(Koss SP-3) and launched an all out
assault on awaiting ear canals.

60.  1959 – At a show in Tokyo, Stax
debuted the world’s first ever
electrostatic pair of headphones
 1979- the most important event in the
history of headphones PORTABLE
headphones. first Walkman were
Sony’s MDL-3L2

61.  1980 Both the earbud and the in-ear
headphone made their way onto the
scene in the 80’s even though they
wouldn’t reach their peak in popularity
until one Steven Paul Jobs changed the
music game years later
 1997 neckband headphones were
introduced

62.  2001 – The iPod changed up the
whole music universe. It became
common to see people with a white
cord running from their pocket to
their ears multiple times a day.
 2012 – Headphones have become
as much about style as they are
sound quality. This may never have
been more relevant than when Lil
Wayne wore these $1 million dollar
pair of Beats.

63. SPEAKERS
 Speakers are popular output
devices used with computer
systems. They receive
audio input from the
computer's sound card and
produce audio output in the
form of sound waves. Most
computer speakers are active
speakers, meaning they have
an internal amplifier which
allows you to increase the
volume, or amplitude, of the
sound.
 Speakers usually come in
pairs, which allows them to
produce stereo sound from two
separate audio channels.

64.  Components: In a component system, each speaker has its
own driver, so there are multiple drivers dedicated to their own
range of frequencies.
 Full range: Full range speakers are more common, as they
are used in many factory audio systems. This makes them
more widely available and more affordable than component
systems.
TYPES OF SPEAKERS