2. INPUT DEVICE
Any hardware component that allows a user
to enter data and instructions into a computer
for processing.
Input: any data or instructions that are
entered into the computer.
3. TYPES OF INPUT DEVICES
Pointing devices Scanning devices
Mouse Scanners
Trackball Barcode readers
Pointing stick Magnetic ink character
Touch pad recognition
Joystick Optical mark readers
Light pen Optical character
Digitizing recognition
tablet/graphics tablets Magnetic strip codes
Smart cards
4. TYPES OF INPUT DEVICES
Audio and Video Other Input Devices
Input Devices Biometric systems
Digital Video Camera Remote Control
Voice recognition Sensors
Keyboard – the most popular input
device!!
5. KEYBOARD
The set of typewriter-like
keys that enables you to
enter data into a computer.
• The keys on computer
keyboards are often
classified as follows:
– Alphanumeric keys --
letters and numbers
– Punctuation keys --
comma, period, semicolon,
and so on.
– Special keys -- function
keys, control keys, arrow
keys, Caps Lock key, and so
on.
6. MOUSE
A device that controls
the movement of the
cursor or pointer on a
display screen.
There are TWO types
Can you spot the difference?
of mice MECHANICAL
and OPTICAL
7. TRACKBALL
Essentially, a trackball Compare with a mouse
is a mouse lying on its
back.
What is the difference?
8. POINTING STICK
Primarily found on
notebook computers
It looks like a miniature
joystick, usually with a
rubber eraser-head tip.
Found between the G,
H and B keys on the
keyboard
9. TOUCH PAD
Is a mouse
replacement used in
portable computers
such as laptops
10. JOYSTICK
I’m sure you have used one of
A device with a stick these to play you favourite
perpendicular to its computer or PS3 game.
Tell us some
base, as well as
buttons on the stick
and or on the base.
Joysticks are used
mostly for computer
games, but they are
also used occasionally
for other applications.
11. LIGHT PEN
An input device that See how it writes
utilizes a light-sensitive directly on the screen!!
detector to select
objects on a display
screen.
12. DIGITIZING TABLET
An input device that Tablets are quite common
enables you to enter nowadays
drawings and sketches Think Ipad, Kindle,
Samsung Galaxy...Kool!!
into a computer.
A digitizing tablet
consists of an
electronic tablet and a
cursor or pen.
13. SCANNER
Translates drawings,
photos and text into
digital form
14. BARCODE READER
A device that scans a set
of bars and spaces
found on a variety of
sale items.
The barcode brings up
product information such
as, product name, size,
brand, manufacturer,
country of origin and
price from the computer.
15. BARCODE READER
Check the items your Observe the clerk at the
mummy or daddy check out counter
place in the shopping Does this scene look
familiar?
cart next time you
accompany them to Can you share with the
class what happens?
the supermarket
16. MAGNETIC INK CHARACTER RECOGNITION
(MICR)
MICR is used to read
and sort bank cheques
and deposit slips.
The numbers at the
bottom of the cheque
are printed in magnetic
ink.
The MICR is able to
read those numbers very
quickly and have the
information sent to a
computer for processing.
17. OPTICAL MARK READER (OMR)
A device that reads
hand drawn marks
such as circles or
rectangles.
A person places these
marks on a form such
as a test, survey or
questionnaire
19. OPTICAL CHARACTER RECOGNITION (OCR)
This involves the
reading of text from
paper and translating it
into electronic format
for manipulation by a
computer
20. MAGNETIC STRIPE READER
Magnetic stripes are
usually found at the back
of credit cards, loyalty
and membership cards
They hold personal
details about the card
holder such as name,
account number and
loyalty points
The card is swiped in the
reader and the
information fed to a
computer
21. SMART CARD
A magnetic strip is
placed on a plastic
card containing
encoded data about
the owner of the card.
The data is processed
by the computer when
the card is swiped.
22. DIGITAL CAMERA
Allows users to take
pictures and store the
photographed images
digitally.
Have you ever used
one of these?
24. MICROPHONE
A device that allows a
user to enter data in
Speak into
audio form.
me!!
For example speech
25. BIOMETRIC READER
A device that identifies Examples of biometric
an individual through systems
their body
characteristics such as
face geometry and
hand geometry.
For example,
fingerprint, iris or retina
scan, vein and voice
patterns.
26. BIOMETRIC READER
Can you say what the word BIOMETRIC
means?
Here’s a clue
BIO: ___________________
METRIC: ___________________
27. REMOTE CONTROL
These emit a beam of
infra-red light which
carries digital data
signals.
They are often used to
control TV's and
VCR's.
More advanced
models can be
programmed to
transmit a series of
commands with one
button press.
28. SENSOR
These detect changes in the physical or
chemical environment and convert them into
electrical signals. These signals can then be
digitised and used by the computer.
They measure quantities such as light,
temperature and pressure
29. INPUT DEVICES – ASSESSMENT
Can you now give an example of where each
device is used?
Device Use
Keyboard
Mouse
Trackball
Pointing stick
Touch pad
Joystick
Light pen
Digitizing tablet/graphics tablets
30. INPUT DEVICES – ASSESSMENT
Device Use
Digital Camera
Microphone
Webcam
Voice recognition
Biometric systems
Remote Control
Sensors