Question

physical controls and displays....


Find as many different examples as you can of physical controls and displays.           

(a) List them

(b) Try to group them, or classify them.

(c) Discuss whether you believe the control or display is suitable for its purpose.

Answer

Part a)

List of physical controls

  • CCTV cameras
  • Ovens
  • Microwaves
  • Washing machines
  • Motion alarm system
  • Digital wristwatches
  • Biometrics 
  • FAX machines
  • Refrigerators

List of display devices

  • LCD
  • LED
  • DVST
  • CRT

Part b)

Classifying each of the physical control with an output device

Physical controls Display devices
  • Ovens
  • Microwaves
  • Washing machines
  • FAX machines
  • Refrigerators
  • CRT (or  Cathode Ray Tube)
  • CCTV cameras
  • Motion alarm system
  • Biometrics 
  • Digital wristwatches
  • LCD (or Liquid Crystal Display

Part c )

The physical controls such as CCTV cameras, biometrics, or alarm system are security measures used to detect or prevent any illegal or unauthorized access to personal property or sensitive material whereas controls like an oven, microwave, or refrigerators use a panel which consists of a number of menus and buttons to operate and control the functions. The LCD and CRT are the display devices that process the data captured from the users by clicking buttons or scanning sensors and display it on the screen.

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