It's an addditional presentation on the Course Computer,which was done @ the middle of the semister

1. Welcome
To our Presentation…

2. presentation on…

3. Presented By…
• Zulfikar Pasha Dipto (B3160B024)
• Farah Amira Khan (B3160B025)

4. What is input device ?
 A piece of computer hardware equipment
 Used to provide data
 Control signals

5. List of input devices …
• Key Board
• Mouse
• Touch Pad
• Touch Screen
• Joystick
• Scanner
• Microphone
• Web Cam

6. Keyboard…
Characteristics…
 Typing Keys
 Numeric Keys
 Function Keys
 Control Keys
 Special purpose keys
Operations…
Analog signal as input
Digital signal as output

7. Advantages…
Having special function
keys
Having arrow keys as the
alternative of Mouse
Less expensive Disadvantages…
User need to learn
Typing
Causing Carpal Tunnel
Syndrome
Keyboard cont’d

8. Mouse…
Characteristics…
 Having two
buttons called left
& right
 Wheel for scrolling
between the
buttons
Operations…
Analog signal as input
Digital signal as output

9. Mouse cont’d
Advantages…
User Friendly
Cheap
Faster than the
arrow keys Disadvantages…
Difficult to use for a
Person having trouble
in Hand
Getting damaged easily
Difficult to use in a
hilly surface

10. Touch pad…
 Characteristics…
 Pointing device having
a tactile sensor
 Common feature of a laptop
 Substitute for a mouse
 Operations…
 Same as mouse

11. Touch pad cont’d
 Advantages…
 Can be designed in a customized
way
 With advanced features
 Having resistance of moisture, dirt,
and surface scratches.
 Having a life of over 1 million tap
 Accuracy Resolution of 1000 DPI
 Can be activated with a single touch
 Fixed in position
 No need to carry an extra mouse
 Disadvantages…
 Available on laptops
only
 Smaller surface for moving
 Difficult to use than a regular
mouse
 Cannot scroll across the screen in
one go

12. Touch Screen…
 Characteristics…
 Display screen with a touch
sensitive transparent panel
 Finger can be used to point objects
 Designed to work with a finger or
stylus
 Can be written or drawn on the
screen with stylus
 Operations…
 Tap
 Double Tap
 Touch & Hold
 Drag
 Swipe
 Pinch
 Advantages…
 Training is unnecessary to use it
 Very simple ,user friendly ,
reliable & cost effective
 Virtually eliminates the error
 Provide fast access to all type of
digital media & avoid wastage
of space
 Ensure sufficient safety &
security
 Variety of languages to display
text
 Interface can be updated by
software
 Disadvantages…
 Can’t be use to enter large
amount of data
 Will cost about 2 or 3
times than a regular
keyboard
 Screen can be damaged or
dirty
 More expensive than a
regular computer

13. Joystick…
 Characteristics…
 Having a spherical ball
in lower & upper ends
 Can be moved in all 4
directions
 Operations…
 Moving
 Tapping
 Advantages…
 Easy to play flight
simulators
& fighting games
 Easy for the brain to
comprehend
with the movement
 Customizable extra button
for easier use
 Disadvantages…
 Difficult to play
without having
joystick support
 Purchasing is a
wastage of money

14. Scanner…
 Characteristics…
 Works like a photocopy
machine
 Transfer data (Paper-Hard disc)
 Capturing images
 Editing images before printing
 Operations…
 Use light beam as signal
 Working as a Photocopier
 Advantages…
 Copy things to computer
 Flatbed scanner can Produce
high quality image
 Can be scanned & editted any
picture or Document
 Disadvantages…
 Wastage of memory
space for image
 Quality depends on
original image
 Whole system
damages for blackout
 Quality depends on
scanner’s resolution

15. Microphone…
 Characteristics…
 Used to add sound
 Used to mix music
 Used to input audio
 Operations…
 Convert voice into sound
 Analog - Digital
 Advantages…
 Faster to read in than to
type
 Sound can be manipulated
in real time
 Ensure safety specially at
the time of Driving
 Disadvantages…
 Wastage of memory
 Lack of accuracy

16. Webcam…
 Characteristics…
 Used to transfer streaming
image/video through computer
network
 Low manufacturing cost &
high flexibility
 Small in size
 Operations…
 Sending & Receiving stream or image
 Connected by a USB cable or built-in
 Advantages…
 Can be left constantly on
the computer
 Allows images at the time
of Chatting
 Disadvantages…
 Poor quality pictures
 Need to be connected
with computer before
using