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