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Tuesday, April 11, 2023ARCHANA RAI
INPUT, OUTPUT, AND STORAGE DEVICES
What Kinds of Peripheral Devices Would Suit Your Needs?
ARCHANA RAI
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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