INPUT DEVICES

Enter all your data: sounds, pictures, letters, numbers and

symbols.

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.

TYPES OF INPUT DEVICES

Pointing devices

Mouse

Trackball

Pointing stick

Touch pad

Joystick

Light pen

Digitizing

tablet/graphics tablets

Scanning devices

Scanners

Barcode readers

Magnetic ink character

recognition

Optical mark readers

Optical character

recognition

Magnetic strip codes

Smart cards

TYPES OF INPUT DEVICES

Audio and Video

Input Devices

Digital Video Camera

Voice recognition

Other Input Devices

Biometric systems

Remote Control

Sensors

Keyboard – the most popular input

device!!

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.

MOUSE

A device that controls

the movement of the

cursor or pointer on a

display screen.

There are TWO types

of mice MECHANICAL

and OPTICAL

Can you spot the difference?

TRACKBALL

Essentially, a trackball

is a mouse lying on its

back.

Compare with a mouse

What is the difference?

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

TOUCH PAD

Is a mouse

replacement used in

portable computers

such as laptops

JOYSTICK

A device with a stick

perpendicular to its

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.

I’m sure you have used one of

these to play you favourite

computer or PS3 game.

Tell us some

LIGHT PEN

An input device that

utilizes a light-sensitive

detector to select

objects on a display

screen.

See how it writes

directly on the screen!!

DIGITIZING TABLET

An input device that

enables you to enter

drawings and sketches

into a computer.

A digitizing tablet

consists of an

electronic tablet and a

cursor or pen.

Tablets are quite common

nowadays

Think Ipad, Kindle,

Samsung Galaxy...Kool!!

SCANNER

Translates drawings,

photos and text into

digital form

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.

BARCODE READER

Check the items your

mummy or daddy

place in the shopping

cart next time you

accompany them to

the supermarket

Observe the clerk at the

check out counter

Does this scene look

familiar?

Can you share with the

class what happens?

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.

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

OPTICAL MARK READER (OMR)

Remember this??

OPTICAL CHARACTER RECOGNITION (OCR)

This involves the

reading of text from

paper and translating it

into electronic format

for manipulation by a

computer

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

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.

DIGITAL CAMERA

Allows users to take

pictures and store the

photographed images

digitally.

Have you ever used

one of these?

WEB CAMERA (WEBCAM)

A device that captures

video images

MICROPHONE

A device that allows a

user to enter data in

audio form.

For example speech

Speak into

me!!

BIOMETRIC READER

A device that identifies

an individual through

their body

characteristics such as

face geometry and

hand geometry.

For example,

fingerprint, iris or retina

scan, vein and voice

patterns.

Examples of biometric

systems

BIOMETRIC READER

Can you say what the word BIOMETRIC

means?

Here’s a clue

BIO: ___________________

METRIC: ___________________

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.

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

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

INPUT DEVICES – ASSESSMENT

Device Use

Digital Camera

Microphone

Webcam

Voice recognition

Biometric systems

Remote Control

Sensors