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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

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


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.


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


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
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


Pen or Handheld



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
  • 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
  • What is anautomated teller machine (ATM)?
  • Self-service banking machine that connects to a host computer through a network
  • 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
Source : Shelly, Gary B. Discovering Computers (2004/2005/2006). Thomson Course Technology. PPT for Chapter 5.