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  • In this chapter you’ll discuss with students a number of peripheral devices that are available. People have varied needs and lifestyles that are fulfilled by different combinations of peripherals and features. First we look at a number of input devices to see how how information is captured and translated into a form that can be processed and used by other parts of the computer. Next come output devices that takes information within your computer and presents it to you in a form that you can understand. The main output devices are monitors, printers, and speakers.networks. Lastly, you’ll focus on the various types of storage devices.
  • Good Exercise: Ask students if they can name any other input devices. A hard drive can be classified as both an input device and an output device.
  • Monitors come in two basic types. CRTs (or cathode ray tubes) are the monitors that look like TV sets. Very heavy Fragile Uses a lot of power. Flat-panel displays are thin, lightweight monitors and take up much less space than CRTs. Use comparatively little power Can run on a notebook battery Not as fragile as CRT monitors The disadvantages of flat-panel Gas plasma displays shine light through gas to make an image. LCD (liquid crystal display) screens shine light through a layer of crystalline liquid to make an image. LCDs are the most usual type of flat panel screens for computers and come in two types: passive matrix and active matrix. Active matrix screens are sometimes referred to as TFT displays. TFT (thin film transistor) are flat panel displays with active matrix screens. Active matrix screens have a separate transistor for every pixel, or dot, on the screen and update faster providing a higher-quality, crisper image. Mention to students that the features they should watch for when evaluating monitors are: Screen size Resolution Dot pitch.
  • For desktops and notebook computers, there are three types of printers: Dot matrix (not mentioned in the text because they’re on their way out) Inkjet Printers Inkjet printers are the most popular type of printers. Great for color as well as black and white printouts. Inkjet printers make images by forcing ink droplets through nozzles. The top speed of an inkjet is about 7 ppm (pages per minute). Laser Printers Laser printers usually generate better quality output than inkjets, but they’re also more expensive - especially the color ones. A laser printer forms images using an electrostatic process – the same way a photo copier works. Laser printers print between 3 and 30 pages per minute depending on type. Black-only laser printers have one toner cartridge. Color laser printers require four, which increase the cost of cartridge replacement considerably.
  • For desktops and notebook computers, there are three types of printers: Dot matrix (not mentioned in the text because they’re on their way out) Inkjet Printers Inkjet printers are the most popular type of printers. Great for color as well as black and white printouts. Inkjet printers make images by forcing ink droplets through nozzles. The top speed of an inkjet is about 7 ppm (pages per minute). Laser Printers Laser printers usually generate better quality output than inkjets, but they’re also more expensive - especially the color ones. A laser printer forms images using an electrostatic process – the same way a photo copier works. Laser printers print between 3 and 30 pages per minute depending on type. Black-only laser printers have one toner cartridge. Color laser printers require four, which increase the cost of cartridge replacement considerably.
  • Ergonomics deals with how you arrange and use your technology to reduce discomfort and avoid health problems. In general, you should sit up straight with your feet on the floor when using a keyboard and mouse.
  • Ask students to give you other examples of storage devices.
  • Computer storage is either magnetic or optical.
  • A hard disk is a magnetic storage medium, usually fixed inside the system unit, consisting of one or more thin platters or disks that store information. Magnetic storage devices all work on the same basic principal – a thin layer of magnetic iron oxide compound coats either metal or plastic and is magnetized to represent information . Read/write heads access the information on the disk surfaces (both top and bottom) and transfer copies to and from RAM. The heads “read” information while copying it from the storage medium to RAM and “write” it when copying it from RAM to the storage medium. Your hard disk is where you store your operating system and application software long-term. When you start up your system, the operating system instructions are copied from your hard disk into memory. When you launch an application, a copy of the software goes into memory so that the CPU can execute the instructions. The CPU can’t carry out software instructions directly from any storage device; they must go into memory first.
  • Since the hard disk is where you keep most of your software until you want to use it, and you’ll probably add new software from time to time It’s generally advisable to get a hard disk as big as you can afford. Hard disk capacity is usually measured in gigabytes, that is, billions of characters.
  • Removable storage media, like floppy disks and CD-ROMs, can be removed from the drive, unlike hard disks which are fixed inside the hard disk drive unit. Removable storage media come in two varieties: magnetic and optical.
  • There are two basic types of removable magnetic storage disks. The first kind are those that store information on a floppy Mylar disk housed inside a plastic casing. A Mylar disk is a thin, flexible plastic disk. Mylar disks come in 2 varieties: traditional 3.5-inch floppy disks and high capacity floppy disks. Note: You might point out that SuperDisks (LS 120s) are no longer being manufactured. They’ve been beaten in the marketplace by Zip disks.
  • The second type of removable storage disk stores information on one or more metal platters instead of on Mylar disks. These are sometimes called removable hard disks. The metal platters provide a higher storage capacity. The Jaz® disk is an example of this type of removable hard disk and has a capacity of 2 GB.
  • Optical storage comes in two capacities… a CD holds up to a maximum of about 800 MB. a DVD holds from 4.7 GB to 17 GB depending on whether it uses both sides and whether the side(s) have one or two layers available for storage
  • Read-Only Optical Storage Media - read-only means you can’t write to it or change it. CD-ROM (compact disc read-only memory) is an optical or laser disc whose information cannot be changed once it has been created. DVD-ROM is an optical storage medium whose information can’t be changed, but which has a larger capacity than a CD-ROM. One-Time Writable Optical Storage Media CD-R (compact disc – recordable) is an optical disc to which you can write information once. DVD-R (DVD – recordable) is an optical disc to which you can write one time only and which has a higher capacity than a CD. Fully Read-and-Write Optical Storage Media CD-RW (compact disc – rewritable) is a compact disc storage medium that allows you to save, change, and delete files. DVD-RW (also called DVD-RAM or DVD+RW by different manufacturers) is an optical storage medium that allows you to save, change, and delete files but which has a larger capacity than a CD-RW.
  • Many students are familiar with this type f memory card as they are popular with the appliances that young students like to purchase. – i.e., MP3 players, digital cameras.

Transcript

  • 1. Input, Output, and Storage What Kinds of Peripheral Devices Would Suit Your Needs? Chapter 5
  • 2. Student Learning Outcomes
    • List and compare eight input devices.
    • Define and describe four types of pointing devices.
    • Compare and contrast inkjet and laser printers.
    • Define the three major technologies on which computer storage is based.
  • 3. 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.
  • 4. 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.
  • 5. What Peripheral Devices Suit Your Needs? Input Devices Output Devices Storage Devices
  • 6. 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.
        • Keyboards
        • Pointing devices
        • Game controllers
        • Scanners
        • Styluses
        • Microphones
        • Digital cameras
        • Web cams
    p. 5.130 Fig. 5-1
    • SimNet Concepts Support CD:
    • “ Overview of Input Devices” and “Other Everyday Input Devices”
  • 7. 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”
                                                                     
  • 8. Types of Input Devices p. 5.131 Fig. 5-2                                                                  
  • 9. 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
    p. 5.131 Fig. 5-2
    • SimNet Concepts Support CD: “Ports and Cables”
  • 10. Pointing Devices
    • Various pointing devices are available
    • Types of pointing devices:
      • Mouse
        • Mechanical mouse
        • Optical mouse
        • Wireless mouse
      • Trackball
      • Touchpad
      • Pointing stick
    p. 5.132 & P. 5.133 Fig. 5-3 & Fig 5.4
    • SimNet Concepts Support CD: “Mice”
  • 11. Game Controller
    • Game controllers are used mainly to play games
    • Types of gaming devices
      • Gamepads
      • Joysticks
      • Gaming wheels
      • Force feed
    p. 5.134 Fig. 5-5                                 
  • 12. Specialized Input Devices
    • Other types of input devices include:
      • Scanners
      • Styluses
      • Microphones
      • Digital cameras
      • Web cams
    p. 5.135 Fig. 5-6
  • 13. 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”
                                                                        
  • 14. 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 PCs
        • Graphics tablets
    p. 5.135 Fig. 5-6                                                                     
  • 15. Microphones
      • Microphones are used to input audio
      • Three main types of microphones are:
        • Desktop microphones
        • Headsets
        • Directional microphones
      • Speech recognition is increasingly being included in application software
                                                                                                                                          
  • 16. 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
    • SimNet Concepts Support CD: “Digital Cameras”
  • 17. Web Cams
      • Web cam is a video camera that can be used to take images for uploading to the Web
  • 18. 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
    • SimNet Concepts Support CD:
    • “ Overview of Output Devices”
  • 19. Flat Panel Display Devices
    • Devices with flat-panel displays
      • Tablet PCs
      • PDAs
      • Cellular phones
      • Desktop computers
                                    
  • 20. 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
    p. 5.137 Fig. 5-9
    • SimNet Concepts Support CD: “Monitors”
  • 21. 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
  • 22. 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
                                    
  • 23. 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
                                    
  • 24. 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
    • SimNet Concepts Support CD: “Printers”
    p. 5.139 Fig. 5-11
  • 25. 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
                                                                     
  • 26. 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
    • SimNet Concepts Support CD: “Ergonomics”
  • 27. 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
  • 28. 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
  • 29. 5.3 Storage Devices
    • Storage device stores information to be recalled and used at a later time
    • Storage device consists of:
        • Storage medium
        • Storage device
    • Three major technology types for information storage:
        • Magnetic
        • Optical or laser
        • Flash memory
    • SimNet Concepts Support CD: “Storage Concepts”
                                    
  • 30. 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
  • 31. Magnetic and Optical Storage p. 5.142 & 5.144 Fig. 5.13 & 5.16
  • 32. 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
    • SimNet Concepts Support CD: “Removable Disks”
  • 33. 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
                                                                     
  • 34. 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
                                                                     
  • 35. 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
  • 36. 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
  • 37. 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
    p. 5.144 Fig. 5.15
  • 38. 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
                                                                     
  • 39. Optical Storage
    • CDs
    • DVDs
    • Both are optical storage and have three formats:
      • Read-only
      • Write-once
      • Read-and-write
  • 40. 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”
  • 41. 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
                                                                                                                                                                                                                  
  • 42. Flash Memory Talk
    • CompactFlash (CF)
    • xD-Picture Card (xD)
    • SmartMedia (SM) Card
    • SecureDigital (SD) card and MultiMediaCards (MMC)
    • Memory Stick Media
  • 43. 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
                                             
  • 44.  
  • 45. 5.4 Consumer Q&A
    • How Can I Tell How Many Megapixels My Camera Should Have to Print Good 8 x 10 Photos?
    • What Type of Mouse Should I Get for Gaming?
    • Are Flat Panels and Flat Screens the Same Thing?
    • What Should I look for in a Scanner?
  • 46. 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
  • 47. 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
  • 48. 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
  • 49. Review of Concepts
    • Stacking Bytes
      • If a gigabyte were a tree, how high would it be?
    • Organizing Input and Output Devices
  • 50. Hands On Projects E-Commerce
    • Choosing a Digital Camera
    • Buying Books
      • Can you find cheaper textbooks on the Web?
    • Renting an Apartment
      • Do you have a pet?
  • 51. Hands On Projects Ethics, Security & Privacy
    • How’s My Driving? Just Pop Out the Flash Memory Card!
      • Parents can now review your driving once you’re home
    • The All-Seeing Global Positioning System
      • Should you be trackable 24x7?
  • 52. Hands On Projects on the Web
    • Comparing Printers
    • Buying a Hard Drive
    • Ordering Photos Online
      • How about a smart frame that changes photos for you?
  • 53. Hands On Projects Group Activities
    • Exploring the Use of Web Cams
    • Researching DVD Recorders
      • Want to copy TV shows to a DVD?
    • Multimedia Controller
    • Protect Your Computer from Unauthorized Use
      • Require a fingerprint check before your keyboard will work