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Tuesday, April 11, 2023ARCHANA RAI

INPUT, OUTPUT, AND STORAGE DEVICES

What Kinds of Peripheral Devices Would Suit Your Needs?

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Student Learning Outcomes

1. List and compare eight input devices.2. Define and describe four types of pointing

devices.3. Compare and contrast inkjet and laser

printers.4. Define the three major technologies on

which computer storage is based.

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Student Learning Outcomes

5. Describe the three classes of CDs and the three classes of DVDs that are available.

6. List and describe five types of flash memory cards that are available for electronic devices such as computers and cameras.

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Introduction

In this chapter, we’ll discuss various input, output, and storage devices designed to meet the various needs and lifestyles of people. This chapter explores the features available in these devices.

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What Peripheral Devices Suit Your Needs?

Input Devices Output Devices Storage Devices

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5.1 Input Devices

• Input device captures information and translates it into a form that can be processed and used by other parts of your computer. KeyboardsPointing devicesGame controllersScannersStylusesMicrophonesDigital camerasWeb cams

SimNet Concepts Support CD: “Overview of Input Devices” and “Other Everyday Input Devices”

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Input Devices The keyboard is the most common input

device. Types of keyboards include:• Wireless• Multimedia and one-touch access• Portable keyboards for PDAs

p. 5.131 Fig. 5-2

                     

          

                     

          

SimNet Concepts Support CD: “Keyboards”

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Types of Input Devices

                     

          

                     

          

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Pointing Devices Pointing devices are mainly used to choose and

enter commands Pointing devices tend to have PS/2 connectors or

USB connectors• PS/2 connector fits into a PS/2 port, which a small round

socket with small holes that fit the pins on the connector• USB connectors fit into USB ports, and these are small

rectangular openings on the back or front of your computer, or even on your keyboard or monitor

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Pointing Devices Various pointing devices are available Types of pointing devices:

• MouseMechanical mouseOptical mouseWireless mouse

• Trackball• Touchpad• Pointing stick

SimNet Concepts Support CD: “Mice”

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Game Controller Game controllers are used mainly to play games Types of gaming devices

• Gamepads• Joysticks• Gaming wheels• Force feed

                     

          

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Specialized Input Devices

Other types of input devices include:• Scanners• Styluses• Microphones• Digital cameras• Web cams

p. 5.135 Fig. 5-6Tuesday, April 11, 2023

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Scanner•Scanner is a light sensitive device that helps you copy or capture images, photos, and artwork that exist on paper. Types of scanners include:Flatbed

                                                                   

SimNet Concepts Support CD: “Scanners”Tuesday, April 11, 2023

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Styluses• Stylus is an input device consisting of a thin

stick that uses pressure to enter information or to click and point

• Styluses are used with:PDAs Tablet PCsGraphics tablets

p. 5.135 Fig. 5-6

                                                                   

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Microphones• Microphones are used to

input audio • Three main types of

microphones are:Desktop microphonesHeadsetsDirectional microphones

• Speech recognition is increasingly being included in application software

                     

          

                                                                   

                     

          

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Digital Cameras

Digital cameras are used to: • Download images to a computer• Post pictures to the Web• Produce videos

Resolution is measured in megapixels

Higher the resolution, better the image quality, but the more expensive the camera

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Web Cams• Web cam is a video camera

that can be used to take images for uploading to the Web

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5.2 Output Devices

Output devices take information within your computer and present it to you in a form that you can understand

Main output devices:› Monitors› Printers› Speakers

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Flat Panel Display Devices Devices with flat-panel displays

• Tablet PCs

• PDAs

• Cellular phones

• Desktop computers

                     

          

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Monitors CRTs Flat-panel displays

› Gas plasma› LCD (liquid crystal display)

Passive matrix Active matrix

Called TFT (thin film transistor) Separate transistor for every pixel

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Screen Talk Screen size measured as a diagonal line

across the screen – from corner to opposite corner

Resolution the number of pixels displayed on the screen (the higher the resolution, the closer together the dots)

Pixels (or picture element) dots that make up the image on your screen

Dot pitch is the distance between the centers of a pair of like-colored pixels

Refresh rate the speed with which a monitor redraws the image of the screen, and is measured in hertz

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Printers Inkjet – most popular

› Makes images by forcing droplets through nozzles

› Top speed is 20 pages per minute

Laser › Forms images using an

electrostatic process› Prints between 3 and 30 pages

per minute

                     

          

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Printers - Cont Resolution of a printer is the

number of dots per inch (dpi) it produces.

Higher the resolution, better the image, and usually the more costly the printer

                     

          

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Printers - Cont.

Multifunction printer:• Scan, copy, fax, and print

• Can be either inkjet or laser

• Cost less than buying individual units

• Take up less desk space

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Speakers A speaker is a device that

produces computer output as sound

Speakers are common devices in computer systems Examples include:• Built-in speaker• Two-device set speakers• Surround sound speakers

                     

          

                     

          

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I•Can: Use a Computer Without Neck and Shoulder Pain

Computer work can lead to physical problems

Ergonomics – deals with reducing discomfort

Should sit up straight at your computer

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Using Your Computer: Ergonomics and Health

Position your screen about the length of your arm away so that you look slightly down at it

Your elbows, knees, and hips should form right angles

Your back should be at a right angle to the floor

Rest your eyes by looking away from the screen frequently

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Using Your Computer: Ergonomics and Health

Stretch your shoulders, back, arms, and wrists at least every 30 minutes

Stretch your hands downward and backward frequently

Always listen to your body when it tells you that you’re uncomfortable and do something about it

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5.3 Storage Devices Storage device stores information to be

recalled and used at a later time Storage device consists of:

Storage mediumStorage device

Three major technology types for information storage:

MagneticOptical or laserFlash memory

                     

          

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Storage Medium Terms

› Byte› Kilobyte (KB)› Megabytes (MB)› Gigabytes (GB)› Terabytes (TB)› Petabyte (PB)› Exabyte (EB)

= 8 bits≈ 1 Thousand Bytes≈ 1 Million Bytes≈ 1 Billion Bytes≈ 1 Trillion Bytes≈ 1 quadrillion Bytes≈ 1 quintillion Bytes

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Magnetic and Optical Storage

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Magnetic Storage Devices: Internal Magnetic Hard Disk

Magnetic storage devices can be either internal or external• Internal magnetic hard disks are fixed

inside the system unit• External magnetic hard disks are

portable

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Magnetic Storage Devices: Internal Magnetic Hard Disk

Internal hard disk is a magnetic storage device with • One or more thin platters that

store information sealed inside the disk drive.

• Read/write heads access the information on surface

• Heads read information while copying it from disk to RAM

• Heads write information when copying it from RAM to disk

                     

          

                     

          

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Magnetic Storage Devices: External Magnetic Hard Disk

External hard disks are magnetic storage media which are portable storage units that you can connect to your computer as necessary• Great for backup storage

devices• Ability to transport your hard

disk from one computer to another

                     

          

                     

          

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Hard Drives

Long term storage system and application software

Operating system and application software are copied from the hard disk to memory

Capacity measured in gigabytes

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Floppy Disks and Zip Disks Removable magnetic storage

media come in two basic types:› Traditional floppy disks› Zip disks

These storage media are useful for:› Storing files for backup or security

purposes› Transferring files from one

computer to another

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Removable Magnetic Storage: Floppy Disk

Floppy Mylar disk› Housed inside a hard

plastic casing› Thin, flexible plastic disk

3.5 inch floppy disks also called floppies, diskettes,

floppy disks Holds about 1.44 megabytes

of information High-capacity disks

Zip® disk

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Removable Magnetic Storage: Zip Disk

High capacity plastic platter disk› Called removable hard disks› Provide a higher storage capacity than

Mylar disks Example - Zip® disk with capacity of 100MB,

250MB, and 750MB

                     

          

                     

          

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Optical Storage

CDs DVDs Both are optical

storage and have three formats:› Read-only› Write-once› Read-and-write

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Optical Storage Media Read-Only

CD-ROM DVD-ROM

One-Time Writable CD-R DVD-R DVD+R

Fully Read-and-Write CD-RW DVD-RW or

DVD+RW or DVD-RAM

SimNet Concepts Support CD: “CDs and DVDs”

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Flash Memory Cards Flash memory cards have

high-capacity storage laminated inside a small piece of plastic

Flash flash memory cards do not need a drive with moving parts to operate

                     

          

                     

          

                     

          

                     

          

                     

                   

                     

          

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Flash Memory Talk

CompactFlash (CF) xD-Picture Card (xD) SmartMedia (SM) Card SecureDigital (SD) card

and MultiMediaCards (MMC)

Memory Stick Media

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Flash Memory Card Readers Some devices have flash memory

slots into which you slide your flash memory card

Other devices can use an external flash memory card reader in order to transfer information

A flash memory drive is a flash memory storage medium for a computer that is small enough to fit in your pocket and usually plugs directly into a USB port

                     

                   

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5.4 Consumer Q&A

1. How Can I Tell How Many Megapixels My Camera Should Have to Print Good 8 x 10 Photos?

2. What Type of Mouse Should I Get for Gaming?

3. Are Flat Panels and Flat Screens the Same Thing?

4. What Should I look for in a Scanner?

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5.5 Key Terms

CompactFlash card Dot pitch Flash memory

cards Flat-panel display Floppy disk Gamepad Gaming wheel

Gas plasma display monitor

Gigabyte Hard disk drive Inkjet printer Input device Joystick

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5.6 Key Terms

Kilobyte Laser printer Liquid crystal

display monitor Megabyte Memory Stick Media Mouse Multifunction printer

MultiMediaCard Output device Photo inkjet

printer Refresh rate Resolution of a

printer Resolution of a

screen Scanner

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5.6 Key Terms

SecureDigital card SmartMedia card Storage drive Stylus Thin film transistor

display monitor

Touchpad Trackball Visible image size Web cam xD-Picture Card Zip disk

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Review of Concepts

1. Stacking Bytes If a gigabyte were a tree, how high

would it be?

2. Organizing Input and Output Devices

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Hands On ProjectsE-Commerce

1. Choosing a Digital Camera2. Buying Books

Can you find cheaper textbooks on the Web?

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Hands On ProjectsEthics, Security & Privacy

1. How’s My Driving? Just Pop Out the Flash Memory Card!

Parents can now review your driving once you’re home

2. The All-Seeing Global Positioning System

Should you be trackable 24x7?

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Hands On Projectson the Web

1. Comparing Printers2. Buying a Hard Drive3. Ordering Photos Online

How about a smart frame that changes photos for you?

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Hands On ProjectsGroup Activities

1. Exploring the Use of Web Cams2. Researching DVD Recorders

Want to copy TV shows to a DVD?3. Multimedia Controller4. Protect Your Computer from

Unauthorized Use Require a fingerprint check before your

keyboard will work

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