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17 Νοε 2013 (πριν από 3 χρόνια και 4 μήνες)

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Discovering Computers

Input

Input Device

Hardware that allows users to enter data or
instructions into a computer



Keyboards


Pointing Devices


Scanners and Reading Devices


Audio Input Devices


Picture/Video Input Devices


Biometric Input Devices


Keyboard

Contains keys user press to enter data


Types of Keys


Function


Number Pad


Toggle Keys


Arrangement of Keys


Ergonomics


QWERTY vs Dvorak


Wired vs Cordless Keyboards

Keyboard


Portable Keyboards


Optical keyboards



Mobile Devices


On
-
screen


Keypad


Mini keypad



Gaming Keyboards (light up, programmable)


Keyboard Monitoring Software

Pointing Devices (Mouse)

Allow user to control a pointer on the screen


Mouse


Mechanic


rubber ball and mouse pad


Optical



light detector on multi
-
surfaces


Air



control media players/slide shows by
moving mouse in the air


Raising mouse up increases volume


Using Mouse


Left
-
Click, Right
-
Click


Right Drag (Display shortcut menu while
moving)


Using Wheel on Mouse

Other Pointing Devices

Allow user to control a pointer on the screen



Trackball


TouchPad


Pointing Stick


Touch Screen and Touch Sensitive Pads
(ipod)


Stylus


Digital Pen


Pressure Sensitive


Built
-
in Cameras save images of handwriting (100
pictures per second)

Controllers for Gaming and Media
Players


Game controllers directs movement and
actions of on
-
screen objects


Gamepad


press options with thumbs or
move sticks in various directions


Joysticks and Wheels


Light Gun


Dance Pads


Motion Sensing Game Controllers (
Wii
)


Touch Sensitive Pads

Audio Input

The process of entering any sound into
the computer such as speech, music, and
sound effects



Microphones


Tape Players


CD/DVD players


Radios


Electronic Keyboards

Voice Input

Example of Audio Input: Entering data by
speaking in a microphone



Voice Recognition (Speech Recognition)


Recognize vocabulary of pre
-
programmed
words


Automated Telephone System at Bank


Dictate memos into word processing program


Speaker Dependent


Train computer by repeating vocabulary


Speaker Independent


Built
-
in set of words

Input for PDA, Tablet PCs, Smart
Phones


PDAs


Stylus


On
-
screen keyboard


Handwriting recognition software


Portable keyboard


Digital camera


Smart Phones


SMS


short message service (Text Messages)


MMS


multimedia message service (pictures, videos)


Digital camera


Tablet PCs


Digital pen


Handwriting recognition software


Docking station


Digital Cameras


Allows users to take pictures and store the
photographed images digitally instead of
on traditional film


Internal Flash memory


Connect to USB port


Edit images while in computer


Adjust
Pixels per inch

to adjust storage

Video Input


PC Video Camera


Add live images to instant messages


Broadcast live images over the internet


Make video telephone calls


Web Cam


Video camera that displays its output on a Web
page


Weather or Traffic information


Employees at work


Home Surveillance


Display still pictures or continual stream of still
images

Scanners and Reading Devices


Light
-
sensing device that translates printed text
and graphics into a form the computer
understands


Types


Flatbed


Pen or Handheld


Sheet Fed


Drum


Optical Character Recognition


Converts scanned text documents into a text file that
can be edited with a word processing program

Optical Readers


Optical Characters


Turnaround documents


return to company that creates
and sends it (phone bill)


Optical Marks


Fill
-
in circles on tests, questionnaires, answer sheet


Bar Code


Vertical lines and spaces of different widths


Retail Stores and Supermarkets


Universal Product Code (UPC)


United States Postal Service


POSTNET

RFID Readers


Radio Frequency Identification


Uses radio signals to communicate with
tag containing a memory chip and
antenna


Readers can be mounted in handheld
devices or on doorways


Alternative to bar code identification to
eliminate the need for checking out items


Track location of soilders, baggage


Toll payment

Magnetic Ink Character Recognition


MICR


Check Processing


Bank Routing Number


Customer Account Number


Check Number


Check Amount (added after check is cashed)

Other input devices


Magnetic Strivp Card Reader


Reads the magnetic stripe on back of credit
cards


Data Collection Devices


Collecting data directly at the location where
the transaction takes place


Employers uses devices to collect data
wirelessly


Restaurants


Grocery Stores


Factories


Outdoors


Terminals


Special Purpose Terminals (Industry Specific)


Point of Sale


Location in a retail or grocery store where customers pay
for goods.


ATM (Automated Teller Machines


DVD Kiosks

Biometric Input


Translates personal characteristic into digital code


Fingerprint Scanner


Grade School


alternative to lunch money


Business


restrict access to computer


Law Enforcement


Grocery stores


Face Recognition


Casino


Super Bowl Ticket Buyers (known criminals)


Secure Rooms


Hand Geometry System


UGA meal cards


Voice Recognition


Iris Recognition

Input Devices for Physically
Challenged


Voice Recognition


Keyguard


allows users to rest hands on
keyboard


Keyboards with larger keys


On
-
screen keyboards


Trackball attached to wheelchair


Head
-
mounted pointer

Web Resources


Take Online Quiz (Chapter 5, Checkpoint,
Multiple Choice)


http://login.course.com



http://scsite.com/dc2005/quiz


View Live Web Cam


Search Online: “Web cam” “Macon” “Weather”


www.13WMAZ.com


What are the prices of some biometric
devices?


What is Skype?