ICT IGCSE Theory Revision Presentation 2.1 Input devices and their uses

[Pages:12]Chapter 2: Input and output devices

ICT IGCSE Theory ? Revision Presentation 2.1 Input devices and their uses

? Identify input devices and their uses, e.g. keyboard, numeric keypad, pointing devices (such as mouse, touchpad, tracker ball), remote control, joystick/driving wheel, touch screen, scanners, digital cameras, microphone, sensors (general), temperature sensor, pressure sensor, light sensor, graphics tablet, video camera, web cam

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Chapter 2: Input and output devices

ICT IGCSE Theory ? Revision Presentation 2.1 Input devices and their uses

Input Devices in their Use

Input Devices allow data to be input into a computer.

Input Devices

Central Processing Unit

(CPU)

Output Devices

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Storage

Chapter 2: Input and output devices

ICT IGCSE Theory ? Revision Presentation 2.1 Input devices and their uses

Input Devices

Device Keyboard

Use

Advantages

Disadvantages

? Inputting data into ? Easy and familiar to Slower method

applications

use

compared to

? Typing commands into ? Fast entry of Text direct data entry.

a CLI Interface

into a document

Numeric Key Pad

Inputting numeric data into: ? ATM ? POS Terminals ? Chip and Pin ? Mobile Phones etc.

Straight forward to

? Keys can be

enter numeric data like too small.

pins or prices at a POS. ? Difficult to

type letters

(older Mobiles

to text)

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ICT IGCSE Theory ? Revision Presentation 2.1 Input devices and their uses

Input Devices

Chapter 2: Input and output devices

Device Mouse

Touch Pad

Use

To control the pointer on the screen to: ? Selecting Windows ? Clicking Icons ? Menu Options ? Positioning Pointer

? Used as a pointing device on a laptop.

Tracker Ball ? Used by users who tend to have limited motility in their wrist (RSI)

Advantages

Disadvantages

? Easy to navigate

? Easily

through menu

Damaged

options

? Flat surface

? Quicker to select an required.

option compared to

using a keyboard.

? Is part of the keyboard so no need for separate device.

? More difficult to use compared to a normal mouse.

? Easier to use

? Tend to be

compared to mouse more

? More accurate

expensive.

positing of the

? Not familiar to

pointer.

users.

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Chapter 2: Input and output devices

ICT IGCSE Theory ? Revision Presentation 2.1 Input devices and their uses

Input Devices

Device Remote Control

Joystick

Driving Wheel

Use Used to control: ? TV Channels and

Menu options ? Multimedia Systems ? Industrial applications ? Used in computer

games and simulators.

? Used by gamers in computer games (Racing/Driving).

? Used in simulators.

Advantages ? Can be used from a

distance.

? Easier to used compared to a keyboard.

? Driving experience is more accurate than using keyboards.

Disadvantages

? Signal could be blocked by obstacles or walls.

? More difficult to use compared to a normal mouse.

? More expensive.

? Movement could be too sensitive

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ICT IGCSE Theory ? Revision Presentation 2.1 Input devices and their uses

Input Devices

Chapter 2: Input and output devices

Device Touch Screen

Scanners

Digital Cameras

Use

Used on: ? Mobile/Tablets ? Point of Sale (POS) ? Interactive White

Boards

? Used to scan in documents or photographs.

Advantages ? Very easy to use

and select options.

? Copies can be created.

? Used to take

? Higher Resolution

photographs and small images can be

video clips.

stored on memory

? Data can be

cards.

transferred to

? No need to develop

computers.

film.

Disadvantages

? Options could be selected accidently.

? Screen can get dirty.

? Quality is dependant on resolution settings.

? Transferring, storing and editing images can be complicated

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ICT IGCSE Theory ? Revision Presentation 2.1 Input devices and their uses

Chapter 2: Input and output devices

Input Devices

Device

Use

Advantages

Disadvantages

Video Cameras ? Used to record video footage.

? Can record in HD ? Footage can be

edited on a computer.

? HD movie take up a lot of storage.

? Cost of camera

Microphone

? Used to input sound into a computer.

? Used in voice recognition applications.

? Voice overs can be ? Voice

added to

recognition is

presentations.

not as accurate

? Recorded audio can as typing text

be typed directly

into a

into Word Processor computer.

applications.

Graphics Tablet

? Used with a stylus to ? Very accurate

draw free hand

method of drawing

drawings which can be compared to a

stored on a computer. pointer device.

? Longer to produce drawings

? Cost of tablet

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Chapter 2: Input and output devices

ICT IGCSE Theory ? Revision Presentation 2.1 Input devices and their uses

Input Devices

Device Web Cams

Use

? Used by users who want to have a web conference (Skype Call)

Advantages

Disadvantages

? Allows for face to ? Quality is

face video chat.

dependant on

? Can contact people internet

without the need to connection

travel.

Light Pens

? Used in CAD applications for drawing onscreen

? More accurate than ? Only used with

touch screens

CRT Monitors

? Small in size

? Dated

Technology

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