Input devices


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Input devices

  1. 1. INPUT DEVICESEnter all your data: sounds, pictures, letters, numbers andsymbols.
  2. 2. INPUT DEVICE Any hardware component that allows a user to enter data and instructions into a computer for processing. Input: any data or instructions that are entered into the computer.
  3. 3. TYPES OF INPUT DEVICES Pointing devices  Scanning devices  Mouse  Scanners  Trackball  Barcode readers  Pointing stick  Magnetic ink character  Touch pad recognition  Joystick  Optical mark readers  Light pen  Optical character  Digitizing recognition tablet/graphics tablets  Magnetic strip codes  Smart cards
  4. 4. TYPES OF INPUT DEVICES Audio and Video  Other Input Devices Input Devices  Biometric systems  Digital Video Camera  Remote Control  Voice recognition  Sensors Keyboard – the most popular input device!!
  5. 5. KEYBOARD The set of typewriter-like keys that enables you to enter data into a computer.• The keys on computer keyboards are often classified as follows: – Alphanumeric keys -- letters and numbers – Punctuation keys -- comma, period, semicolon, and so on. – Special keys -- function keys, control keys, arrow keys, Caps Lock key, and so on.
  6. 6. MOUSE A device that controls the movement of the cursor or pointer on a display screen. There are TWO types Can you spot the difference? of mice MECHANICAL and OPTICAL
  7. 7. TRACKBALL Essentially, a trackball  Compare with a mouse is a mouse lying on its back.  What is the difference?
  8. 8. POINTING STICK Primarily found on notebook computers It looks like a miniature joystick, usually with a rubber eraser-head tip. Found between the G, H and B keys on the keyboard
  9. 9. TOUCH PAD Is a mouse replacement used in portable computers such as laptops
  10. 10. JOYSTICK I’m sure you have used one of A device with a stick these to play you favourite perpendicular to its computer or PS3 game. Tell us some base, as well as buttons on the stick and or on the base. Joysticks are used mostly for computer games, but they are also used occasionally for other applications.
  11. 11. LIGHT PEN An input device that  See how it writes utilizes a light-sensitive directly on the screen!! detector to select objects on a display screen.
  12. 12. DIGITIZING TABLET An input device that  Tablets are quite common enables you to enter nowadays drawings and sketches  Think Ipad, Kindle, Samsung Galaxy...Kool!! into a computer. A digitizing tablet consists of an electronic tablet and a cursor or pen.
  13. 13. SCANNER Translates drawings, photos and text into digital form
  14. 14. BARCODE READER A device that scans a set of bars and spaces found on a variety of sale items. The barcode brings up product information such as, product name, size, brand, manufacturer, country of origin and price from the computer.
  15. 15. BARCODE READER Check the items your  Observe the clerk at the mummy or daddy check out counter place in the shopping  Does this scene look familiar? cart next time you accompany them to  Can you share with the class what happens? the supermarket
  16. 16. MAGNETIC INK CHARACTER RECOGNITION(MICR) MICR is used to read and sort bank cheques and deposit slips. The numbers at the bottom of the cheque are printed in magnetic ink. The MICR is able to read those numbers very quickly and have the information sent to a computer for processing.
  17. 17. OPTICAL MARK READER (OMR) A device that reads hand drawn marks such as circles or rectangles. A person places these marks on a form such as a test, survey or questionnaire
  18. 18. OPTICAL MARK READER (OMR) Remember this??
  19. 19. OPTICAL CHARACTER RECOGNITION (OCR) This involves the reading of text from paper and translating it into electronic format for manipulation by a computer
  20. 20. MAGNETIC STRIPE READER Magnetic stripes are usually found at the back of credit cards, loyalty and membership cards They hold personal details about the card holder such as name, account number and loyalty points The card is swiped in the reader and the information fed to a computer
  21. 21. SMART CARD A magnetic strip is placed on a plastic card containing encoded data about the owner of the card. The data is processed by the computer when the card is swiped.
  22. 22. DIGITAL CAMERA Allows users to take pictures and store the photographed images digitally.  Have you ever used one of these?
  23. 23. WEB CAMERA (WEBCAM) A device that captures video images
  24. 24. MICROPHONE A device that allows a user to enter data in Speak into audio form. me!! For example speech
  25. 25. BIOMETRIC READER A device that identifies  Examples of biometric an individual through systems their body characteristics such as face geometry and hand geometry. For example, fingerprint, iris or retina scan, vein and voice patterns.
  26. 26. BIOMETRIC READER Can you say what the word BIOMETRIC means? Here’s a clue  BIO: ___________________  METRIC: ___________________
  27. 27. REMOTE CONTROL These emit a beam of infra-red light which carries digital data signals. They are often used to control TVs and VCRs. More advanced models can be programmed to transmit a series of commands with one button press.
  28. 28. SENSOR These detect changes in the physical or chemical environment and convert them into electrical signals. These signals can then be digitised and used by the computer. They measure quantities such as light, temperature and pressure
  29. 29. INPUT DEVICES – ASSESSMENT Can you now give an example of where each device is used? Device Use Keyboard Mouse Trackball Pointing stick Touch pad Joystick Light pen Digitizing tablet/graphics tablets
  30. 30. INPUT DEVICES – ASSESSMENTDevice UseDigital CameraMicrophoneWebcamVoice recognitionBiometric systemsRemote ControlSensors
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