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WelcomeTo our Presentation…
presentation on…
Presented By…• Zulfikar Pasha Dipto (B3160B024)• Farah Amira Khan (B3160B025)
What is input device ? A piece of computer hardware equipment
Used to provide data
Control signals
List of input devices …• Key Board• Mouse• Touch Pad• Touch Screen
• Joystick• Scanner• Microphone• Web Cam
Keyboard…Characteristi
cs…Typing KeysNumeric KeysFunction KeysControl KeysSpecial
purpose keys
Operations…Analog signal as
inputDigital signal as
output
Advantages…Having special
function keysHaving arrow keys
as the alternative of Mouse
Less expensiveDisadvantages
…User need to
learn TypingCausing Carpal
Tunnel Syndrome
Keyboard cont’d
Mouse…Characteris
tics…Having two
buttons called left & right
Wheel for scrolling between the buttons
Operations…Analog signal as inputDigital signal as output
Mouse cont’dAdvantages
…User FriendlyCheapFaster than
the arrow keys
Disadvantages…Difficult to use for a Person having trouble in HandGetting damaged easilyDifficult to use in a hilly surface
Touch pad… Characteristics… Pointing device having a tactile sensor Common feature of a laptop Substitute for a mouse
Operations… Same as mouse
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
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
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
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
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
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
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