Input Devices
Learning Objectives: By the end of this topic you should be able to:
Learning Objectives: By the end of this topic you should be able to: identify an appropriate input device for a given situation and justify the choice made;
Learning Objectives: By the end of this topic you should be able to: identify an appropriate input device for a given situation and justify the choice made; describe specialist input devices for physically disabled users
R:\A-level\Hardware\Input devices Input Devices videos R:\A-level\Hardware\Input devices
Keyboards traditional QWERTY keyboard designed for typing ergonomic QWERTY keyboard to reduce RSI mobile ‘phone keyboards designed for SMS Braille keyboards for those with visual impairments
‘Hunter’s Hints’ for exam questions “Be in the scenario” imagine you are doing the tasks mentioned What devices might you see in front of you? What devices will you need to do your job? Why would you need them?
Trackerball
Trackerball Air Traffic Control
Trackerball Notebook Computer
Trackerball provides similar functionality to a mouse
Trackerball provides similar functionality to a mouse more accurate input of small movements.
Trackerball provides similar functionality to a mouse more accurate input of small movements. often used as a pointing device in applications like air traffic control when accuracy is critical.
Trackerball provides similar functionality to a mouse more accurate input of small movements. often used as a pointing device in applications like air traffic control when accuracy is critical. used as a pointing device for laptops do not need a flat surface to work on.
Microphone
Microphone voice activation allows command and control of the computer using spoken words,
Microphone voice activation allows command and control of the computer using spoken words, use commands to open and close programs, navigate the menu bar, switch between programs, control programs
Microphone voice activation allows command and control of the computer using spoken words, use commands to open and close programs, navigate the menu bar, switch between programs, control programs software has to be trained to recognise user’s voice
Microphone voice activation allows command and control of the computer using spoken words, use commands to open and close programs, navigate the menu bar, switch between programs, control programs software has to be trained to recognise user’s voice not good in noisy environments
Graphics Tablet
Graphics Tablet
Graphics Tablet specialist input device for technical drawings,
Graphics Tablet specialist input device for technical drawings, used by artists, designers and architects
Graphics Tablet specialist input device for technical drawings, used by artists, designers and architects consists of a flat tablet and a stylus
Graphics Tablet specialist input device for technical drawings, used by artists, designers and architects consists of a flat tablet and a stylus position of the stylus on the tablet can be detected
Graphics Tablet specialist input device for technical drawings, used by artists, designers and architects consists of a flat tablet and a stylus position of the stylus on the tablet can be detected drawing is similar to using paper and pencil with which the user will already be familiar
Touch Screen Information Kiosk
Touch Screen Bar POS Till
Touch Screen Restaurant POS
Touch Screen CNC Machine control
Touch Screen
Touch Screen used in bars, restaurants at POS, areas where using mouse/keyboard not possible
Touch Screen used in bars, restaurants at POS, areas where using mouse/keyboard not possible monitor detects position of finger placed on screen
Touch Screen used in bars, restaurants at POS, areas where using mouse/keyboard not possible monitor detects position of finger placed on screen used as screens on PDAs and mobile ‘phones
Touch Screen used in bars, restaurants at POS, areas where using mouse/keyboard not possible monitor detects position of finger placed on screen used as screens on PDAs and mobile ‘phones Advantages provides a natural interface for computer novices
Touch Screen used in bars, restaurants at POS, areas where using mouse/keyboard not possible monitor detects position of finger placed on screen used as screens on PDAs and mobile ‘phones Advantages provides a natural interface for computer novices Disadvantages hard to point accurately to small areas of the screen dialling, handwriting difficult
Scanners Flat-bed Scanner
Scanners Bar-code Scanners
Scanners Bar-code Scanners
Scanners Fingerprint Scanner
Scanners MICR Scanner
Digitiser
Digitiser digitising is the conversion of analogue data into a computer readable form (digital)
Digitiser digitising is the conversion of analogue data into a computer readable form (digital) examples of digitising:
examples of digitising: Digitiser digitising is the conversion of analogue data into a computer readable form (digital) examples of digitising: importing video footage into a computer from a video tape or camera (AVI, MPEG, DivX, XVid)
examples of digitising: Digitiser digitising is the conversion of analogue data into a computer readable form (digital) examples of digitising: importing video footage into a computer from a video tape or camera (AVI, MPEG, DivX, XVid) transferring maps/drawings into a computer image
examples of digitising: Digitiser digitising is the conversion of analogue data into a computer readable form (digital) examples of digitising: importing video footage into a computer from a video tape or camera (AVI, MPEG, DivX, XVid) transferring maps/drawings into a computer image audio capture
examples of digitising: Digitiser digitising is the conversion of analogue data into a computer readable form (digital) examples of digitising: importing video footage into a computer from a video tape or camera (AVI, MPEG, DivX, XVid) transferring maps/drawings into a computer image audio capture motion-capture
examples of digitising: Digitiser digitising is the conversion of analogue data into a computer readable form (digital) examples of digitising: importing video footage into a computer from a video tape or camera (AVI, MPEG, DivX, XVid) transferring maps/drawings into a computer image audio capture motion-capture handwriting recognition (PDAs, parcel delivery)
Digitiser
3D Motion Capture
Sensors
Sensors a device that responds to a physical stimulus and produces a corresponding electrical signal. heat, light, sound, pressure, motion, flow … aka: transducer, detector
Sensors
Sensors
Sensors
Sensors
Sensors
Sensors
Sensors
Sensors a device that responds to a physical stimulus and produces a corresponding electrical signal. heat, light, sound, pressure, motion, flow … aka: transducer, detector applications include:
Sensors a device that responds to a physical stimulus and produces a corresponding electrical signal. heat, light, sound, pressure, motion, flow … aka: transducer, detector applications include: cars - ABS, engine management, reversing, auto wipers/lights
Sensors a device that responds to a physical stimulus and produces a corresponding electrical signal. heat, light, sound, pressure, motion, flow … aka: transducer, detector applications include: cars - ABS, engine management, reversing, auto wipers/lights washing machines - temperature, door open, water level
Sensors a device that responds to a physical stimulus and produces a corresponding electrical signal. heat, light, sound, pressure, motion, flow … aka: transducer, detector applications include: cars - ABS, engine management, reversing, auto wipers/lights washing machines - temperature, door open, water level medicine - pulse, blood pressure, sugar level
Sensors a device that responds to a physical stimulus and produces a corresponding electrical signal. heat, light, sound, pressure, motion, flow … aka: transducer, detector applications include: cars - ABS, engine management, reversing, auto wipers/lights washing machines - temperature, door open, water level medicine - pulse, blood pressure, sugar level greenhouse automation - temperature humidity, light
Sensors a device that responds to a physical stimulus and produces a corresponding electrical signal. heat, light, sound, pressure, motion, flow … aka: transducer, detector applications include: cars - ABS, engine management, reversing, auto wipers/lights washing machines - temperature, door open, water level medicine - pulse, blood pressure, sugar level greenhouse automation - temperature humidity, light security systems - PIR, pressure mats, vibration, sound
Sensors a device that responds to a physical stimulus and produces a corresponding electrical signal. heat, light, sound, pressure, motion, flow … aka: transducer, detector applications include: cars - ABS, engine management, reversing, auto wipers/lights washing machines - temperature, door open, water level medicine - pulse, blood pressure, sugar level greenhouse automation - temperature humidity, light security systems - PIR, pressure mats, vibration, sound games controllers - Nintendo Wii, laser golf …..
Analogue to Digital Converter (ADC) Definitions: Analogue = continually varying Digital = discrete binary patterns of 0s and 1s
Analogue to Digital Converter (ADC) Definitions: Analogue = continually varying Digital = discrete binary patterns of 0s and 1s An ADC is: an electronic device which converts a voltage into a binary code (digital data)
Foot Mouse
Foot Mouse hand-held mouse operation replace by foot motion
Foot Mouse hand-held mouse operation replace by foot motion allows a person who has limited manual physical ability to control a computer
Foot Mouse hand-held mouse operation replace by foot motion allows a person who has limited manual physical ability to control a computer avoid RSI associated with desktop mice
Puff-suck switch
Puff-suck switch switch can activate a device by sucking or puffing through the air tube.
Puff-suck switch switch can activate a device by sucking or puffing through the air tube. allows a person who has very limited physical ability to control a computer
Eye-typer movement of the eye tracked by system to move cursor allows a person who has very limited physical ability to control a computer
Magnetic Card reader data encoded in magnetic strip on rear of card card "swiped" through a magnetic reader at POS also used by some security systems for access
Chip & PIN reader security data encoded in chip on card card placed in reader, 4 digit PIN entered and verified France has cut card fraud by more than 80% UK trial was held in Northampton in 2003!
Digital Cameras
Digital Cameras use memory cards instead of film to store ‘photos
Digital Cameras use memory cards instead of film to store ‘photos still, video and web cameras available
Digital Cameras use memory cards instead of film to store ‘photos still, video and web cameras available most mobile ‘phones now have digital camera built in ‘photographs, digital video, video conferencing, webcam
Digital Cameras use memory cards instead of film to store ‘photos still, video and web cameras available most mobile ‘phones now have digital camera built in ‘photographs, digital video, video conferencing, webcam quality of image (resolution) measured in megapixels
Learning Objectives: By the end of this topic you should be able to: identify an appropriate input device for a given situation and justify the choice made;
Learning Objectives: By the end of this topic you should be able to: identify an appropriate input device for a given situation and justify the choice made; describe specialist input devices for physically disabled users: puff-suck switch, foot mouse, eye typer, Braille keyboard, microphones.
Input Devices questions
Input Devices questions What are the differences between the following questions?
Input Devices questions What are the differences between the following questions? One of the employees who works at an estate agents is physically disabled and unable to use a standard keyboard. Describe two different input devices which would enable them to use the computer. [4]
Input Devices questions What are the differences between the following questions? One of the employees who works at an estate agents is physically disabled and unable to use a standard keyboard. Describe two different input devices which would enable them to use the computer. [4] Identify three input devices that could be used by a person who has no arms. [3]
Input Devices questions What are the differences between the following questions? One of the employees who works at an estate agents is physically disabled and unable to use a standard keyboard. Describe two different input devices which would enable them to use the computer. [4] Identify three input devices that could be used by a person who has no arms. [3] What is required of you for each question?
Input Devices questions What are the differences between the following questions? One of the employees who works at an estate agents is physically disabled and unable to use a standard keyboard. Describe two different input devices which would enable them to use the computer. [4] Identify three input devices that could be used by a person who has no arms. [3] What is required of you for each question? How did you know what to do?
Input Devices questions
Input Devices questions Identify a device that could be used to input a paper photograph to a computer system. [1]
Input Devices questions Identify a device that could be used to input a paper photograph to a computer system. [1] Identify a device that could be used to edit a photograph that is stored on a computer system. [1]
Input Devices questions Identify a device that could be used to input a paper photograph to a computer system. [1] Identify a device that could be used to edit a photograph that is stored on a computer system. [1] Identify three different input devices an architect will need in her office. In each case give an example of its use. [6]
Input Devices questions Identify a device that could be used to input a paper photograph to a computer system. [1] Identify a device that could be used to edit a photograph that is stored on a computer system. [1] Identify three different input devices an architect will need in her office. In each case give an example of its use. [6] Apart from a keyboard and mouse, identify three other input devices cinema staff might use when selling tickets. [3]