1. Input Devices

2. Learning Objectives:
By the end of this topic you should be able to:

3. 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;

4. 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

5. R:\A-level\Hardware\Input devices
Input Devices videos
R:\A-level\Hardware\Input devices

6. 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

7. ‘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?

8. Trackerball

9. Trackerball
Air Traffic Control

10. Trackerball
Notebook Computer

11. Trackerball
provides similar functionality to a mouse

12. Trackerball provides similar functionality to a mouse
more accurate input of small movements.

13. 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.

14. 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.

15. Microphone

16. Microphone
voice activation allows command and control of the computer using spoken words,

17. 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

18. 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

19. 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

20. Graphics Tablet

21. Graphics Tablet

22. Graphics Tablet
specialist input device for technical drawings,

23. Graphics Tablet specialist input device for technical drawings,
used by artists, designers and architects

24. Graphics Tablet specialist input device for technical drawings,
used by artists, designers and architects
consists of a flat tablet and a stylus

25. 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

26. 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

27. Touch Screen
Information Kiosk

28. Touch Screen
Bar POS Till

29. Touch Screen
Restaurant POS

30. Touch Screen
CNC Machine control

31. Touch Screen

32. Touch Screen used in bars, restaurants at POS,
areas where using mouse/keyboard not possible

33. Touch Screen used in bars, restaurants at POS,
areas where using mouse/keyboard not possible
monitor detects position of finger placed on screen

34. 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

35. 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

36. 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

37. Scanners
Flat-bed Scanner

38. Scanners
Bar-code Scanners

39. Scanners
Bar-code Scanners

40. Scanners
Fingerprint Scanner

41. Scanners
MICR Scanner

42. Digitiser

43. Digitiser
digitising is the conversion of analogue data into a computer readable form (digital)

44. Digitiser
digitising is the conversion of analogue data into a computer readable form (digital)
examples of digitising:

45. 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)

46. 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

47. 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

48. 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

49. 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)

50. Digitiser

51. 3D Motion Capture

52. Sensors

53. Sensors
a device that responds to a physical stimulus and produces a corresponding electrical signal.
heat, light, sound, pressure, motion, flow …
aka: transducer, detector

54. Sensors

55. Sensors

56. Sensors

57. Sensors

58. Sensors

59. Sensors

60. Sensors

61. 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:

62. 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

63. 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

64. 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

65. 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

66. 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

67. 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 …..

68. Analogue to Digital Converter (ADC)
Definitions:
Analogue = continually varying
Digital = discrete binary patterns of 0s and 1s

69. 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)

70. Foot Mouse

71. Foot Mouse
hand-held mouse operation replace by foot motion

72. Foot Mouse hand-held mouse operation replace by foot motion
allows a person who has limited manual physical ability to control a computer

73. 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

74. Puff-suck switch

75. Puff-suck switch
switch can activate a device by sucking or puffing through the air tube.

76. 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

77. 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

78. 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

79. 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!

80. Digital Cameras

81. Digital Cameras
use memory cards instead of film to store ‘photos

82. Digital Cameras use memory cards instead of film to store ‘photos
still, video and web cameras available

83. 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

84. 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

85. 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;

86. 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.

87. Input Devices questions

88. Input Devices questions
What are the differences between the following questions?

89. 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]

90. 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]

91. 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?

92. 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?

93. Input Devices questions

94. Input Devices questions
Identify a device that could be used to input a paper photograph to a computer system [1]

95. 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]

96. 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]

97. 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]