Pertemuan 3 understanding input peripherals
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Pertemuan 3 Understanding Input Peripherals. Matakuliah: J0282 / Pengantar Teknologi Informasi Tahun: 2005 Versi: 02/02. Learning Outcomes. Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : menjelaskan tentang contoh-contoh perangkat input pada komputer. Outline Materi.

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Pertemuan 3 Understanding Input Peripherals

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Pertemuan 3 understanding input peripherals

Pertemuan 3Understanding Input Peripherals

Matakuliah: J0282 / Pengantar Teknologi Informasi

Tahun: 2005

Versi: 02/02


Learning outcomes

Learning Outcomes

Pada akhir pertemuan ini, diharapkan mahasiswa

akan mampu :

  • menjelaskan tentang contoh-contoh perangkat input pada komputer


Outline materi

Outline Materi

  • Pointing Devices

  • Voice Input

  • Input Devices for Mobile User

  • Scanners


What is input

What Is Input?

  • What isinput?

  • Data or instructions entered into memory of computer

  • Input device is any hardware component used to enter data or instructions


What is input1

What Is Input?

  • What are the two types of input?

  • Data

  • Unprocessed text, numbers, images, audio, and video

  • Instructions

    • Programs

    • Commands

    • User responses


  • The keyboard

    The Keyboard

    • How is the keyboard divided?

    • Typing area

    • Numeric keypad

    • Function keys, special keys that issue commands


    The keyboard1

    The Keyboard

    • What is acordless keyboard?

    • Communicate with a receiver attached to a port on the system unit


    Pointing devices

    mouse buttons

    wheel button

    ball

    mouse pad

    Pointing Devices

    • What is amouse?

    • Pointing device that fits under palm of hand

    • Pointing device controls movement of pointer, also called mouse pointer

    • Mechanical mousehas rubber or metal ball on underside


    Pointing devices1

    Pointing Devices

    • What is anoptical mouse?

    • No moving mechanical parts inside

    • Senses light to detect mouse’s movement

    • More precise than mechanical mouse

    • Connects using a cable, or wireless


    Other pointing devices

    Other Pointing Devices

    • What is atrackball?

    • Stationary pointing device with a ball on its top

    • To move pointer, rotate ball with thumb, fingers, or palm of hand


    Other pointing devices1

    Other Pointing Devices

    • What are atouchpadand apointing stick?

    • Touchpadis small, flat, rectangular pointing device sensitive to pressure and motion

    • Pointing stickis pointing device shaped like pencil eraser positioned between keys on keyboard


    Other pointing devices2

    Other Pointing Devices

    • What are ajoystickand awheel?

    • Joystickis vertical lever mounted on a base

    • Wheelis steering-wheel-type input device

      • Pedal simulates car brakes and accelerator


    Other pointing devices3

    Other Pointing Devices

    • What is alight pen?

    • Handheld input device that can detect light

      • Press light pen against screen surface and then press button on pen


    Other pointing devices4

    Other Pointing Devices

    • What is atouch screen?

    • Touch areas of screen with finger

    • Often used with kiosks


    Other pointing devices5

    Other Pointing Devices

    • What is astylus?

    • Looks like a ballpoint pen, but uses pressure to write text and draw lines

    • Used withgraphics tablets, flat electronic boards


    Other pointing devices6

    Other Pointing Devices

    • Where is a stylus used?

    • Some desktop computers

    • Many mobile computers and devices

      • Handwriting recognition software translates handwriting into characters that computer can process


    Voice input

    Step 1. A user dictates text into a microphone.

    10010111010110101100001101

    Step 4. To narrow a list down, software presents user with a list of choices or uses a natural language component to predict most likely match. User may correct any selection made by software.

    Step 3. Software compares spoken measurements with those in its database to find a match or list of possible matches.

    Natural Language Engine

    Matches

    Voice Input

    • How does voice recognition work?

    Step 2. An analog-to-digital converter (ADC) translates sound waves into digital measurements computer can process. Measurements include pitch, volume, silences, and phonemes. Phonemes are sound units such as aw and guh.


    Voice input1

    Voice Input

    • What is aMIDI (musical instrument digital interface)?

    • External device, such as electronic piano keyboard, to input music and sound effects


    Pdas tablet pcs and smart phones

    PDAs, Tablet PCs, and Smart Phones

    • How is a data entered into a PDA?


    Pdas tablet pcs and smart phones1

    PDAs, Tablet PCs, and Smart Phones

    • What is aportable keyboard?

    • Full-sized keyboard you conveniently attach to and remove from PDA


    Virtual keyboard

    Virtual Keyboard


    Pdas tablet pcs and smart phones2

    PDAs, Tablet PCs, and Smart Phones

    • What is asmart phone?

    • Users can input and send text messages, graphics, pictures, video clips, and sound files

    • Many have a built-in or attachable camera


    Digital cameras

    Digital Cameras

    • What is adigital camera?

    • Allows you to take digital pictures

    • Images viewable immediately on camera

      • Download to computer

      • Post pictures to Web


    Video input

    Video Input

    • What isvideo input?

    • Process of entering full-motion images into computer

    • Video capture cardis adapter card that converts analog video signal into digital signal that computer can use

    • Digital video (DV) camerarecords video as digital signals


    Video input1

    Video Input

    • What are aPC video cameraand aWeb cam?

    • PC video camerac—cDV camera used to capture video and still images, and to make video telephone calls on Internet

      • Also called PC camera

    • Web camc—cvideo camera whose output displays on a Web page


    Video input2

    Video Input

    • What isvideo conferencing?

    • Two or more geographically separated people who use network on Internet to transmit audio and video data

    • Whiteboard is another window on screen that can display notes and drawings simultaneously on all participants’ screens


    Scanners and reading devices

    Flatbed

    Pen or Handheld

    Sheet-fed

    Drum

    Scanners and Reading Devices

    • What is ascanner?

    • Light-sensing device that reads printed text and graphics

      • Used for image processing, converting paper documents into electronic images


    Scanners and reading devices1

    Scanners and Reading Devices

    • What is anoptical reader?

    • Device that uses light source to read characters, marks, and codes and then converts them into digital data

    • Optical character recognition (OCR)reads characters in OCR font

    • Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles

    • Bar code scanner


    Scanners and reading devices2

    Scanners and Reading Devices

    • What is abar code reader?

    • Uses laser beams to read bar codes


    Scanners and reading devices3

    Scanners and Reading Devices

    • What is adata collection device?

    • Obtains data directly at location where transaction or event takes place

    • Transmits data over network or Internet


    Terminals

    Terminals

    • What is apoint of sale (POS) terminal?

    • Records purchases, processes credit or debit cards, and updates inventory

      • Swipe credit or debit card through card readerc—creads customer’s personal data from magnetic strip


    Terminals1

    Terminals

    • What is anautomated teller machine (ATM)?

    • Self-service banking machine that connects to a host computer through a network


    Terminals2

    Terminals

    • What is asmart display?

    • Thin monitor that detaches from computer to function as portable wireless touch screen


    Biometric input

    Biometric Input

    • What isbiometrics?

    • Authenticates person’s identity by verifying personal characteristic

    • Fingerprint scanner captures curves and indentations of fingerprint

    • Hand geometry system measures shape and size of person’s hand


    Biometric input1

    Biometric Input

    • What are examples of biometric technology?

    • Voice verification system compares live speech with stored voice pattern

    • Signature verification system recognizes shape of signature

    • Iris recognition systemreads patterns in blood vessels in back of eye

    • Biometric data is sometimes stored on smart card, which stores personal data on microprocessor embedded in card


    Pertemuan 3 understanding input peripherals

    • Source : Shelly, Gary B. Discovering Computers (2004/2005/2006). Thomson Course Technology. PPT for Chapter 5.


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