7.2 Digital Devices

• Digital device


  An electronic device which stores and uses digital data
• Input device


  A hardware device that allows users to enter data into a computer
• Analogue device


  A device that DOES NOT use digital data
• Hybrid device


  A device that can be used for both computer input and output
• Sensor


  A device used to detect changes in the environment
• Output device


  A device that converts computer information into a form humans can use
• Analogue devices replaced by digital devices


  • Vinyl records replaced by Compact Discs (CDs)
  • Advantages of CDs over Vinyl Records: Cheaper to produce, Less prone to damage, Higher fidelity, Smaller and easier to store
• Input devices


  • Mouse
  • Keyboard
  • Scanner
• Output devices


  • Monitor
  • Speakers
  • Laser Printer
• Hybrid device


  Touchscreen - allows a user to input data into a computer (making use of an onscreen touch keyboard) but can also display the output visually for the user
• Computers can only understand information that has been converted into binary digital data form
• Binary digital data


  Information that has been translated into a form that the computer can store (in its memory) or process
• Computer input devices are used to convert information into binary digital data format so that it can be input into the computer to be processed
• Sensor


  A device used to detect (input) changes in the environment
• Sensors convert environment information into binary digital data
• Laser sensor


  Enables street lighting to automatically switch on when it gets dark
• Sound sensors


  Used by Alexa and Siri to enable voice recognition
• Proximity sensors


  Used to open doors when a person stands in front of them
• Motion sensors


  Used in home security systems to detect burglars
• Humidity sensors


  Used in greenhouses to check air moisture
• Proximity sensor


  Used to lock the screen of a smartphone when you hold it to your ear to take a call
• Fill in the missing words that can be found in the wordsearch below!
• Remember to write your name at the top of your wordsearch answer paper as they will be collected in!
• Computer's can only understand information that has been converted into binary digital data form
• Computer Input Devices


  Used to convert information into binary digital data format so that it can be input into the computer to be processed
• Computer


  A machine which responds to instructions to complete a task
• Computer


  A device which takes input data, processes it and outputs the result
• Inside a Computer


  • Motherboard
  • Power Supply
  • CPU
  • RAM
• Power Supply


  The heart of the computer
• Computer Case


  The skeleton of the computer
• Hard Drive


  The long term memory of the computer
• Motherboard


  The central nervous system of the computer
• Central Processor Unit (CPU)


  The brain of the computer
• Random Access Memory (RAM)


  The short term memory of the computer
• Applications Software


  Software that includes word processors, web browsers, spreadsheets, presentation software and database programs
• Word processing application software that can be used to produce your homework documents
• Find the words in the wordsearch. they may be vertical, horizontal or diagonal, backwards or forwards.
• Use pink shading if it is an input device
• Use yellow if it is an output device
• Use pale blue if it is hybrid device