Practical Literacy 2e Ch. 2

7/25/2019 Practical Literacy 2e Ch. 2

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Chapter 2

PeripheralDevices

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Whats inside and on the CD?

This chapter provides an overview on: Keyboard and mouse

Speciai!ed input devices

Trac"pads

Di#ita cameras $oystic"s

Dispay devices and printers

%oice synthesi!ers and potters

Technoo#ies that provide easiest connections Component purchasin#

Tips to hep when shoppin# &or a computer' so&tware' andperiphera devices

(ractica Computer )iteracy' *ndeditionChapter *


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What is a periphera device?

+ peripheral deviceis any input or output component

that connects to a computer

Standard components incude:

Keyboard ,ouse

Dispay unit

(rinter



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Speciai!ed periphera devices incude:

(ayin# #ames

,onitorin# home security

Capturin# video ima#es

Speciai!ed periphera devices are "ey components o& ar#e-scae computers

.i#h-speed printers &or mass maiin#s

.i#h-speed optica character readers in ban"s

Computer-controed robots &or: +rc wedin#

Circuit board assemby

(aintin#



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.andhed scannin# devices "eep trac" o& pac"a#e

deiveries

/(C scanners in chec"-out anes



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What are the options &or standard

input devices?

The "eyboard is the most important input device on

des"top and noteboo" computers

Desi#n o& "eyboard is based on typewriters

0W2T3 ayout

+dditiona "eypad &or editin#

4unction "eys &or computer-speci&ic tas"s

5umeric "eypad



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input devices?



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input devices?

(ointin# devices manipuate on-screen pointer

,ice

Trac"bas

(ointin# stic"s Trac"pads

$oystic"s



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input devices?



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What are the options &or speciai!ed

(C input devices?

+joystickoo"s i"e cars stic" shi&t

Contros ob6ects on screen

Can be adapted &or physica chaen#es thatma"e it di&&icut to use "eyboard

+ digital camera used to capture sti ima#es

asiy trans&erred to computer

(roduce ima#es that can be stored'manipuated' posted on the Web' and

transmitted as emai attachments

(ractica Computer )iteracy' *nd

editionChapter *


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(C input devices?

+ digital videocameracaptures movin#ima#es

asiy trans&erred to computer

asiy edited on computer

+ graphics tablet&eatures pressure-sensitivesur&ace and pen &or &ree-hand drawin#

+ digitizing tabletprovides &at sur&ace &orvector drawin# such as bueprints and technica

drawin#s


editionChapter *


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(C input devices?

+ touch-sensitive screencan detect the ocationo& a &in#ertip or styus within the screen area

+ scannerconverts ima#es into bitmap #raphics

that can be viewed and edited with #raphicso&tware

Can capture od photo#raphs

Scanned Te7t can be manipuated i& scanner

has optical character recognition


editionChapter *


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(C input devices?

Standard microphone is used to coect audio input and ispart o& sound card

Some so&tware has speech recognitionto aow &or

voice commands instead o& "eyboard and mouse .andy &or narrations on Web sites and videos

2e8uire ots o& stora#e space


editionChapter *


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What are the most popuar dispay

technoo#ies?

LCDdispay produces ima#e by manipuatin# i#ht within

ayer o& i8uid crysta ces

CRTdispay device' such as #ass tube on standard T%

Plasma screencreates ima#e by iuminatin# miniaturecoored &uorescent i#hts in pane-i"e screen


editionChapter *


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What are the most popuar dispay

technoo#ies?

(er&ormance o& dispay device is &actor o&:

creen size

Dot pitch

Response time

Color depth

Contrast ratio

creen resolution


editionChapter *


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What are the most popuar printer

technoo#ies?

Todays printers typicay use in" 6et or aser technoo#y

+n ink jet printerhas no!!e-i"e print head that spraysin" to &orm characters and #raphics

9ne7pensive choice o& most home and sma

business appications (rint hi#h 8uaity ima#es produced by di#ita

cameras and scanners

+ laser printeruses same technoo#y as photocopier ,ore e7pensive

Choice &or business printers that produce hi#hvoumes


editionChapter *


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What are the most popuar printer

technoo#ies?

When seectin# printer consider:

Print resolution

Print speed

Duty cycle !perating costs

"emory

Duple# printing

$et%orkability


editionChapter *


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output devices?

/p#rade computers spea"er system &or better sound

8uaity

+ plotteris a specia printer &or ine drawin# such as

bueprints

+ voice synthesizerconverts di#ita te7t into audio

output

+ computer projection devicedispays computer-

#enerated ima#es on ar#e screen


editionChapter *


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.ow do 9 connect periphera devices

to my computer?

9nstaation is a pathway to transmit data between device andcomputer

Wired connection may re8uire ony connectin# wire tocomputer or may re8uire addin# e7pansion card to systemunit

,ost computers incude a variety o& buit-in ports &orconnectin# devices

Today' &'universa seria bus; is the pre&erred way toconnect devices

Wireess connection typicay re8uires transceiver on bothdevices

9n&rared i#ht


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.ow do 9 connect periphera devices

to my computer?


editionChapter *


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.ow do 9 connect periphera devices to my

computer?

9& periphera device re8uires a port not on your computer'you insta an e#pansion card

Some devices re8uire so&tware' caed device driver' toset up communications


editionChapter *


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.ow do 9 seect components &or my

computer system?

=uideines &or purchasin# periphera devices:

Consider the tas"s &or which you use the computer

Determine your bud#et

Seect a computer pat&orm

Choose a des"top' noteboo"' or tabet con&i#uration

Seect processor type and speed

Seect an operatin# system


editionChapter *


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.ow do 9 seect components &or my

computer system?

Consider your stora#e needs

Consider 2+, and video memory capacity

vauate the computers up#radeabiity Seect so&tware

Seect periphera devices and accessories

vauate manu&acturer and vendor support and

warranty


editionChapter *


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Practical Literacy 2e Ch. 2

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