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Input, Output, and Storage

Input, Output, and Storage. What Kinds of Peripheral Devices Would Suit Your Needs? Chapter 5. Student Learning Outcomes. List and compare eight input devices. Define and describe four types of pointing devices. Compare and contrast inkjet and laser printers.

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Input, Output, and Storage

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  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. ©2003 The McGraw-Hill Companies

  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. ©2003 The McGraw-Hill Companies

  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. ©2003 The McGraw-Hill Companies

  5. What Peripheral Devices Suit Your Needs? Input Devices Output Devices Storage Devices ©2003 The McGraw-Hill Companies

  6. 5.1 Input Devices • Input devicecaptures 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 • SimNet Concepts Support CD: “Overview of Input Devices” and “Other Everyday Input Devices” p. 5.130 Fig. 5-1 ©2003 The McGraw-Hill Companies

  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 • SimNet Concepts Support CD: “Keyboards” p. 5.131 Fig. 5-2 ©2003 The McGraw-Hill Companies

  8. Types of Input Devices p. 5.131 Fig. 5-2 ©2003 The McGraw-Hill Companies

  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 • SimNet Concepts Support CD: “Ports and Cables” p. 5.131 Fig. 5-2 ©2003 The McGraw-Hill Companies

  10. Pointing Devices • Various pointing devices are available • Types of pointing devices: • Mouse • Mechanical mouse • Optical mouse • Wireless mouse • Trackball • Touchpad • Pointing stick • SimNet Concepts Support CD: “Mice” p. 5.132 & P. 5.133 Fig. 5-3 & Fig 5.4 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  12. Specialized Input Devices • Other types of input devices include: • Scanners • Styluses • Microphones • Digital cameras • Web cams p. 5.135 Fig. 5-6 ©2003 The McGraw-Hill Companies

  13. Scanner • Scanneris 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” ©2003 The McGraw-Hill Companies

  14. Styluses • Stylusis 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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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” ©2003 The McGraw-Hill Companies

  17. Web Cams • Web camis a video camera that can be used to take images for uploading to the Web ©2003 The McGraw-Hill Companies

  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” ©2003 The McGraw-Hill Companies

  19. Flat Panel Display Devices • Devices with flat-panel displays • Tablet PCs • PDAs • Cellular phones • Desktop computers ©2003 The McGraw-Hill Companies

  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 • SimNet Concepts Support CD: “Monitors” p. 5.137 Fig. 5-9 ©2003 The McGraw-Hill Companies

  21. Screen Talk • Screen size measured as a diagonal line across the screen – from corner to opposite corner • Resolutionthe 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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  25. Speakers • Aspeakeris 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 ©2003 The McGraw-Hill Companies

  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” ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  29. 5.3 Storage Devices • Storage devicestores 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” ©2003 The McGraw-Hill Companies

  30. 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 Storage Medium Terms ©2003 The McGraw-Hill Companies

  31. Magnetic and Optical Storage p. 5.142 & 5.144 Fig. 5.13 & 5.16 ©2003 The McGraw-Hill Companies

  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” ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  39. Optical Storage • CDs • DVDs • Both are optical storage and have three formats: • Read-only • Write-once • Read-and-write ©2003 The McGraw-Hill Companies

  40. 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 Optical Storage Media • SimNet Concepts Support CD: “CDs and DVDs” ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  42. Flash Memory Talk • CompactFlash (CF) • xD-Picture Card (xD) • SmartMedia (SM) Card • SecureDigital (SD) card and MultiMediaCards (MMC) • Memory Stick Media ©2003 The McGraw-Hill Companies

  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 ©2003 The McGraw-Hill Companies

  44. ©2003 The McGraw-Hill Companies

  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? ©2003 The McGraw-Hill Companies

  46. 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 5.5 Key Terms ©2003 The McGraw-Hill Companies

  47. 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 5.6 Key Terms ©2003 The McGraw-Hill Companies

  48. SecureDigital card SmartMedia card Storage drive Stylus Thin film transistor display monitor Touchpad Trackball Visible image size Web cam xD-Picture Card Zip disk 5.6 Key Terms ©2003 The McGraw-Hill Companies

  49. Review of Concepts • Stacking Bytes • If a gigabyte were a tree, how high would it be? • Organizing Input and Output Devices ©2003 The McGraw-Hill Companies

  50. Hands On ProjectsE-Commerce • Choosing a Digital Camera • Buying Books • Can you find cheaper textbooks on the Web? • Renting an Apartment • Do you have a pet? ©2003 The McGraw-Hill Companies

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