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ICT IGCSE Theory – Revision Presentation, 2.1 Input devices and their uses, •, , Chapter 2: Input and output devices, , 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, , WWW.YAHMAD.CO.UK
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ICT IGCSE Theory – Revision Presentation, 2.1 Input devices and their uses, Input Devices in their Use, , Chapter 2: Input and output devices, , Input Devices allow data to be input into a computer., Input, Devices, , Central, Processing Unit, (CPU), , Storage, WWW.YAHMAD.CO.UK, , Output, Devices
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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, , Use, , Keyboard, , • 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., , WWW.YAHMAD.CO.UK, , Advantages, , Disadvantages, , 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, , Use, , Advantages, , Mouse, , To control the pointer on, the screen to:, • Selecting Windows, • Clicking Icons, • Menu Options, • Positioning Pointer, , • Easy to navigate, • Easily, through menu, Damaged, options, • Flat surface, • Quicker to select an, required., option compared to, using a keyboard., , Touch Pad, , • Used as a pointing, device on a laptop., , • Is part of the, keyboard so no, need for separate, device., , Tracker Ball • Used by users who, tend to have limited, motility in their wrist, (RSI), WWW.YAHMAD.CO.UK, , Disadvantages, , • 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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ICT IGCSE Theory – Revision Presentation, 2.1 Input devices and their uses, Input Devices, , Chapter 2: Input and output devices, , Device, , Use, , Advantages, , Disadvantages, , Remote, Control, , Used to control:, • TV Channels and, Menu options, • Multimedia Systems, • Industrial applications, , • Can be used from a, distance., , • Signal could be, blocked by, obstacles or, walls., , Joystick, , • Used in computer, games and simulators., , • Easier to used, compared to a, keyboard., , • More difficult, to use, compared to a, normal mouse., , Driving, Wheel, , • Used by gamers in, computer games, (Racing/Driving)., • Used in simulators., , • Driving experience, is more accurate, than using, keyboards., , • More, expensive., • Movement, could be too, sensitive, , WWW.YAHMAD.CO.UK
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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, , Use, , Advantages, , Disadvantages, , Touch, Screen, , Used on:, • Mobile/Tablets, • Point of Sale (POS), • Interactive White, Boards, , • Very easy to use, and select options., , • Options could, be selected, accidently., • Screen can get, dirty., , Scanners, , • Used to scan in, documents or, photographs., , • Copies can be, created., , • Quality is, dependant on, resolution, settings., , Digital, Cameras, , • 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., , WWW.YAHMAD.CO.UK, , • Transferring,, storing and, editing images, can be, complicated
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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, , 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., , WWW.YAHMAD.CO.UK, , • Longer to, produce, drawings, • Cost of tablet
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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, , Use, , Advantages, , Web Cams, , • Used by users who, want to have a web, conference (Skype, Call), , • 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, touch screens, • Small in size, , WWW.YAHMAD.CO.UK, , Disadvantages, , • Only used with, CRT Monitors, • Dated, Technology
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ICT IGCSE Theory – Revision Presentation, 2.1 Input devices and their uses, Discuss why different user interfaces require the use of different types of, input devices., , Chapter 2: Input and output devices, , Exam Question, With a GUI (graphical user interface) a mouse enables users to easily manoeuvre a, pointer around a screen to select Icons representing applications, menu options and, windows. The mouse can also be used to drag windows and icons across the screen., People with disabilities may prefer to use a trackerball as a pointing device as they may, have limited motility in their wrists. In addition a joystick or gamepad could be used to, mimic the behavior of a mouse when playing games. On the other hand a keyboard will, be required to enter command prompts into a CLI (Command Line Interface). Touch, screens can be used to directly select options on a screen normally found on portable, devices such as smart phones, tablets or even at a POS (Point of Sale)., , WWW.YAHMAD.CO.UK
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ICT IGCSE Theory – Revision Presentation, 2.1 Input devices and their uses, , Chapter 2: Input and output devices, , Compare and contrast the use of Mouse, Touchpad and Tracker ball as a, pointing device?, Key Words: familiar, flat surface, damage, difficult/easier use, fixed, device, limited motility, expensive, , Exam Question, The mouse is normally used with a desktop computer and is the most familiar, pointing device used. However the mouse requires a flat surface to be used and is, more likely to be damaged. The touch pad is a fixed device commonly found on, laptops. It is more difficult to use compared to a mouse. The tracker ball pointing, device is used by users who have limited motility in their wrist. User would move the, ball at the top of the device using their fingers to control the pointer on the screen., The tracker ball however tends to be more expensive than the other pointing, devices., , WWW.YAHMAD.CO.UK
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ICT IGCSE Theory – Revision Presentation, 2.1 Input devices and their uses, Input Devices : Sensors, , Chapter 2: Input and output devices, , A sensor is a device that converts a real world property into data that a, computer can process., Sensor, , Example Use, , Temperature, , Used in green houses to measure temperature, , Light, , Umpires check light conditions in cricket match, , Moisture, , To check the moisture in the soil in a green house, , Water-Level, , Used in washing machine to measure water level, , Proximity, , Used when parking cars to judge distance., , Movement, , Detects movement which could trigger an alarm, , Pressure, , Used in burglar alarms, , WWW.YAHMAD.CO.UK
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ICT IGCSE Theory – Revision Presentation, 2.1 Input devices and their uses, Input Devices : Sensors, , Chapter 2: Input and output devices, , Real world measurements, are collected as an analogue, signal from the sensor., A computer only, understands digital signals., An ADC (Analogue-to-digital, converter) is needed to, convert the signal so a, computer understands the, signal., WWW.YAHMAD.CO.UK, , Data collected from Sensor is in, Analogue, ADC - Analogue-to-digital converter, Analogue Signal now can be, understood by computers.
