Input Devices

Input Devices

• 1.
  INPUT DEVICES Enter allyour data: sounds, pictures, letters, numbers and symbols.
• 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.
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  TYPES OF INPUTDEVICES  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.
  TYPES OF INPUTDEVICES  Audio and Video  Other Input Devices Input Devices  Biometric systems  Digital Video Camera  Remote Control  Voice recognition  Sensors Keyboard – the most popular input device!!
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  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.
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  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
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  TRACKBALL  Essentially, a trackball  Compare with a mouse is a mouse lying on its back.  What is the difference?
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  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
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  TOUCH PAD  Is a mouse replacement used in portable computers such as laptops
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  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.
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  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.
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  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.
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  SCANNER  Translates drawings, photos and text into digital form
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  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.
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  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
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  MAGNETIC INK CHARACTERRECOGNITION (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.
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  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
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  OPTICAL MARK READER(OMR)  Remember this??
• 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.
  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
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  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.
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  DIGITAL CAMERA  Allows users to take pictures and store the photographed images digitally.  Have you ever used one of these?
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  WEB CAMERA (WEBCAM)  A device that captures video images
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  MICROPHONE  A device that allows a user to enter data in Speak into audio form. me!!  For example speech
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  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.
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  BIOMETRIC READER  Canyou say what the word BIOMETRIC means?  Here’s a clue  BIO: ___________________  METRIC: ___________________
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  REMOTE CONTROL  These emit a beam of infra-red light which carries digital data signals.  They are often used to control TV's and VCR's.  More advanced models can be programmed to transmit a series of commands with one button press.
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  SENSOR  These detectchanges 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
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  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.
  INPUT DEVICES –ASSESSMENT Device Use Digital Camera Microphone Webcam Voice recognition Biometric systems Remote Control Sensors