er 5 pt ha C Input And Output

er 5 pt ha C Input And Output Input is any data and instructions entered into the memory of a computer. Input Device is any hardware component that allows users to enter data and instructions into a computer. 1

er 5 pt ha C Input Devices Keyboard and pointing devices: Mouse is a pointing device because it allows a user to control a pointer on the screen. In GUI, a pointer is a small symbol on the screen whose location and shape change as a user moves a pointing device can select text, graphics and other objects and click buttons, icons, links and menu commands. 2

er 5 pt ha C Input Devices Categories Keyboard Cable keyboard Wireless keyboard Mouse Trackball Mechanical Optical Touchpad Input Devices Pointing Stick Light Pen Pointing Devices Touch Screen Optical Scanner Pen Input Optical Reader Audio Input Barcode Reader Digital Camera Scanner and reading devices RFID reader MIRC reader Magnetic strip card readers Biometric Input Physical Behavioral 3

er 5 pt ha C Mouse There are 2 types: mechanical mouse and Optical mouse. v Mechanical mouse has a rubber or metal ball on its underside. v You should place a mechanical mouse on a mouse pad. v Mouse pad is a rectangular rubber or foam pad that provides better traction than the top of a desk v Optical mouse uses devices that emit and sense light to detect the mouse’s movement. v Some use optical sensors; other use laser. 4

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er 5 pt ha C Trackball Is a stationary pointing device with a ball on its top or side, Similar to a mechanical mouse that has a ball on the bottom. v To move the pointer using a trackball, you rotate the ball with your thumb, fingers or the palm of your hand. 7 v It has one or more buttons

er 5 pt ha C Touchpad rectangular Is a small, flat, pointing device that is sensitive to pressure and motion. v To move the pointer, slide your fingertip across the surface of the pad. v You also can tap the pad’s surface to imitate mouse operations such as clicking. v Around the edge of the pad there are one or more 8

er 5 pt ha C Pointing Stick Is a pressure-sensitive pointing device shaped like a pencil eraser that is positioned between keys on a keyboard. v To move the pointer you push the pointing stick with a finger. v IBM developed the pointing stick for its notebook computers. 9

er 5 pt ha C Light Pen Is a handheld pointing device that detect the presence of light. To select objects on the screen, v a user press the light pen against the surface of the screen v or points the light pen at the screen and then press a button on the pen. 10

er 5 pt ha C The Keyboard Ø Is an input device that contains keys users press to enter data and instructions into a computer. v v v Typing area Numeric keypad Function Keys Media control buttons Internet control Ø Desktop computer keyboard often attach to the System Unit using v v Cable: a serial port or USB port. Without cables : Ir or Bluetooth Ø Wireless keyboard or cordless keyboard, is a buttery-powered device that transmits data using 11

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er 5 pt ha C Touch screen Is a touch-sensitive display device. v Users can interact with these device by touching areas of the screen. v Because touch screens require a lot of arm movements, you do not enter large 13

er 5 pt ha C Pen Input Mobile users often enter data and instructions with a pen-type device. v With pen input , users write, draw, and tap on a flat surface to enter input. v The surface maybe a monitor, a screen, a special type of paper or 14

er 5 pt ha C Audio Input Is the process of entering any sound into the computer such as speech, music, and sound effects. User enter sound into computer via devices such as v microphones v tape players v CD/DVD players v radios 15

er 5 pt ha C Other Types of Input Digital Cameras Allows users to take pictures and store the photographed image digitally instead of on traditional film. v They use internal flash memory to store images. v Others store images on mobile storage media, including a flash memory, memory stick and mini 16

er 5 pt ha C Digital Cameras v A digital camera's resolution is defined in pixels. v The greater the number of pixels the camera uses to capture an image, 17

er 5 pt ha C Scanners and Reading Devices devices Some input save time by capturing data directly from a source document. 1. Optical scanner 2. Optical readers 3. Bar code readers 4. RFID readers 5. Magnetic strip card readers 6. Magnetic-ink character recognition reader. 18

er 5 pt ha C 1 - Optical scanner Usually called a scanner Is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can process. Many scanner include OCR ( optical character recognition ) software, which can read and convert text documents into electronic files. 19

er 5 pt ha C 2 - Optical Readers Is a device that uses a light source to read characters, marks and codes and then converts them into digital data that a computer can process. Two technologies used by optical readers are A. Optical character recognition. B. Optical mark recognition. 20

er 5 pt ha C A- Optical character recognition (OCR) v Involves reading handwritten, typewritten or printed text and translating the image into a form the computer can process. v Most OCR devices include a small optical scanner for reading characters and sophisticated SW to analyze what read. v It range from large machines 21

er 5 pt ha C B- Optical mark recognition (OMR) Devices read hand-drawn marks such as small circles or rectangles. One of the most familiar applications of optical mark recognition is the use of pencil bubble optical answer sheets in multiple choice question examinations. 22

er 5 pt ha C 3 - Bar Code Readers also called bar code scanner v is an electronic device that uses laser beams for reading printed barcodes. v Bar code is an identification code that consists of set of vertical lines and spaces of different widths. v The bar code represent the data that identifies the manufacturer and the item. 23

er 5 pt ha C 4 - RFID Readers Radio-frequency identification readers v is a technology that uses radio signals to communicate with a tag placed in or attached to an object, an animal, or a person. v RFID tags, which contain a memory chip and an antenna, are available in many shapes and size. v RFID reader reads information on the tag via radio waves. It can be handheld devices or mounted in a 24

er 5 pt ha C RFID Readers v Many retailer see RFID as an alternative to bar code identification because it dose not require direct contact or line-of-site transmission. v Other uses of RFID include tracking times of runners in a marathon; 25

er 5 pt ha C 5 - Magnetic strip card readers Often called a magstripe reader v Reads the Magnetic strip on the back of credit cards or other similar cards. v The strip contains information identifying you. v Some information stored in the strip includes your name, account number, the card expiration date, and a country code. v If the Magnetic strip card readers rejects your card, it is possible that the Magnetic strip is scratched, dirty or 26

er 5 pt ha C 6 - MICR Reader Magnetic-ink character recognition Devices read text printed with magnetized ink. v MICR reader converts MIRC characters into a form the computer can process. v The banking industry almost exclusively uses MICR for check processing. Bank routing no. Account no. Check amount. 27

er 5 pt ha C Biometric Input Is the technology of authenticating a person’s identity by verifying a personal characteristic. v Biometric devices grant users access to programs, systems, or rooms by analyzing some physiological or behavioral characteristic. v such as fingerprints, eye patterns, voice patterns, facial features, 28

er 5 pt ha C Biometric Input v Fingerprint scanner v Face recognition system v Hand geometry system v Voice verification system v Signature verification system v Iris recognition 29

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