I o device


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I o device

  1. 1. INPUT, OUTPUT, ANDSTORAGE DEVICESWhat Kinds of Peripheral DevicesWould SuitYourNeeds?Wednesday, May 01, 2013ARCHANA RAI
  2. 2. 1. List and compare eight input devices.2. Define and describe four types of pointingdevices.3. Compare and contrast inkjet and laserprinters.4. Define the three major technologies onwhich computer storage is based.ARCHANA RAI Wednesday, May 01, 2013
  3. 3. 5. Describe the three classes of CDs and thethree classes of DVDs that are available.6. List and describe five types of flash memorycards that are available for electronicdevices such as computers and cameras.ARCHANA RAI Wednesday, May 01, 2013
  4. 4. In this chapter, we’ll discuss various input,output, and storage devices designed tomeet the various needs and lifestyles ofpeople.This chapter explores the features availablein these devices.ARCHANA RAI Wednesday, May 01, 2013
  5. 5. ARCHANA RAIInput Devices Output Devices Storage DevicesWednesday, May 01, 2013
  6. 6. • Input device captures information and translates it into a formthat can be processed and used by other parts of your computer.KeyboardsPointing devicesGame controllersScannersStylusesMicrophonesDigital camerasWeb camsARCHANA RAISimNet Concepts Support CD:“Overview of Input Devices” and “Other Everyday InputDevices”Wednesday, May 01, 2013
  7. 7.  The keyboard is the most common inputdevice. Types of keyboards include:• Wireless• Multimedia and one-touch access• Portable keyboards for PDAsARCHANA RAIp. 5.131 Fig. 5-2SimNet Concepts Support CD: “Keyboards”Wednesday, May 01, 2013
  8. 8. ARCHANA RAI Wednesday, May 01, 2013
  9. 9.  Pointing devices are mainly used to choose andenter commands Pointing devices tend to have PS/2 connectors orUSB connectors• PS/2 connector fits into a PS/2 port, which a small roundsocket with small holes that fit the pins on the connector• USB connectors fit into USB ports, and these are smallrectangular openings on the back or front of your computer,or even on your keyboard or monitorARCHANA RAI Wednesday, May 01, 2013
  10. 10.  Various pointing devices are available Types of pointing devices:• MouseMechanical mouseOptical mouseWireless mouse• Trackball• Touchpad• Pointing stickARCHANA RAISimNet Concepts Support CD: “Mice”Wednesday, May 01, 2013
  11. 11.  Game controllers are used mainly to play games Types of gaming devices• Gamepads• Joysticks• Gaming wheels• Force feedARCHANA RAI Wednesday, May 01, 2013
  12. 12.  Other types of input devices include:• Scanners• Styluses• Microphones• Digital cameras• Web camsARCHANA RAIp. 5.135 Fig. 5-6Wednesday, May 01, 2013
  13. 13. •Scanner is a light sensitive device that helps youcopy or capture images, photos, and artworkthat exist on paper. Types of scanners include:FlatbedARCHANA RAISimNet Concepts Support CD: “Scanners”Wednesday, May 01, 2013
  14. 14. • Stylus is an input device consisting of a thinstick that uses pressure to enter informationor to click and point• Styluses are used with:PDAsTablet PCsGraphics tabletsARCHANA RAIp. 5.135 Fig. 5-6Wednesday, May 01, 2013
  15. 15. • Microphones are used toinput audio• Three main types ofmicrophones are:Desktop microphonesHeadsetsDirectional microphones• Speech recognition isincreasingly being includedin application softwareARCHANA RAI Wednesday, May 01, 2013
  16. 16.  Digital cameras are used to:• Download images to a computer• Post pictures to the Web• Produce videos Resolution is measured inmegapixels Higher the resolution, better theimage quality, but the moreexpensive the cameraARCHANA RAI Wednesday, May 01, 2013
  17. 17. • Web cam is a video camerathat can be used to takeimages for uploading to theWebARCHANA RAI Wednesday, May 01, 2013
  18. 18.  Output devices takeinformation within yourcomputer and present it toyou in a form that you canunderstand Main output devices:› Monitors› Printers› SpeakersARCHANA RAI Wednesday, May 01, 2013
  19. 19.  Devices with flat-panel displays• Tablet PCs• PDAs• Cellular phones• Desktop computersARCHANA RAI Wednesday, May 01, 2013
  20. 20.  CRTs Flat-panel displays› Gas plasma› LCD (liquid crystal display) Passive matrix Active matrix Called TFT (thin film transistor) Separate transistor for every pixelARCHANA RAI Wednesday, May 01, 2013
  21. 21.  Screen size measured as a diagonal line acrossthe screen – from corner to opposite corner Resolution the number of pixels displayed onthe screen (the higher the resolution, the closertogether the dots) Pixels (or picture element) dots that make upthe image on your screen Dot pitch is the distance between the centersof a pair of like-colored pixels Refresh rate the speed with which a monitorredraws the image of the screen, and ismeasured in hertzARCHANA RAI Wednesday, May 01, 2013
  22. 22.  Inkjet – most popular› Makes images by forcing dropletsthrough nozzles› Top speed is 20 pages per minute Laser› Forms images using anelectrostatic process› Prints between 3 and 30 pagesper minuteARCHANA RAI Wednesday, May 01, 2013
  23. 23.  Resolution of a printer is thenumber of dots per inch (dpi) itproduces. Higher the resolution, better theimage, and usually the morecostly the printerARCHANA RAI Wednesday, May 01, 2013
  24. 24.  Multifunction printer:• Scan, copy, fax, and print• Can be either inkjet or laser• Cost less than buyingindividual units• Take up less desk spaceARCHANA RAI Wednesday, May 01, 2013
  25. 25.  A speaker is a device thatproduces computer outputas sound Speakers are commondevices in computer systemsExamples include:• Built-in speaker• Two-device set speakers• Surround sound speakersARCHANA RAI Wednesday, May 01, 2013
  26. 26.  Computer work canlead to physicalproblems Ergonomics – dealswith reducingdiscomfort Should sit up straightat your computerARCHANA RAI
  27. 27.  Position your screen about the length ofyour arm away so that you look slightlydown at it Your elbows, knees, and hips should formright angles Your back should be at a right angle to thefloor Rest your eyes by looking away from thescreen frequentlyARCHANA RAI Wednesday, May 01, 2013
  28. 28.  Stretch your shoulders, back, arms, andwrists at least every 30 minutes Stretch your hands downward andbackward frequently Always listen to your body when it tells youthat you’re uncomfortable and dosomething about itARCHANA RAI Wednesday, May 01, 2013
  29. 29.  Storage device stores information to berecalled and used at a later time Storage device consists of:Storage mediumStorage device Three major technology types forinformation storage:MagneticOptical or laserFlash memoryARCHANA RAI Wednesday, May 01, 2013
  30. 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 BytesARCHANA RAI Wednesday, May 01, 2013
  31. 31. ARCHANA RAI Wednesday, May 01, 2013
  32. 32.  Magnetic storage devices can beeither internal or external• Internal magnetic hard disks are fixedinside the system unit• External magnetic hard disks areportableARCHANA RAI Wednesday, May 01, 2013
  33. 33.  Internal hard disk is amagnetic storage device with• One or more thin platters thatstore information sealed insidethe disk drive.• Read/write heads access theinformation on surface• Heads read information whilecopying it from disk to RAM• Heads write information whencopying it from RAM to diskARCHANA RAI Wednesday, May 01, 2013
  34. 34.  External hard disks aremagnetic storage mediawhich are portable storageunits that you can connectto your computer asnecessary• Great for backup storagedevices• Ability to transport your harddisk from one computer toanotherARCHANA RAI Wednesday, May 01, 2013
  35. 35.  Long term storagesystem and applicationsoftware Operating system andapplication software arecopied from the harddisk to memory Capacity measured ingigabytesARCHANA RAI
  36. 36.  Removable magnetic storagemedia come in two basic types:› Traditional floppy disks› Zip disks These storage media are usefulfor:› Storing files for backup or securitypurposes› Transferring files from one computerto anotherARCHANA RAI Wednesday, May 01, 2013
  37. 37.  Floppy Mylar disk› Housed inside a hardplastic casing› Thin, flexible plastic disk 3.5 inch floppy disks also called floppies, diskettes,floppy disks Holds about 1.44 megabytes ofinformation High-capacity disks Zip® diskARCHANA RAI
  38. 38.  High capacity plastic platter disk› Called removable hard disks› Provide a higher storage capacity thanMylar disks Example - Zip® disk with capacity of 100MB,250MB, and 750MBARCHANA RAI Wednesday, May 01, 2013
  39. 39.  CDs DVDs Both are opticalstorage and havethree formats:› Read-only› Write-once› Read-and-writeARCHANA RAI
  40. 40.  Read-Only CD-ROM DVD-ROM One-Time Writable CD-R DVD-R DVD+R Fully Read-and-Write CD-RW DVD-RW orDVD+RW orDVD-RAMARCHANA RAISimNet Concepts Support CD: “CDs and DVDs”Wednesday, May 01, 2013
  41. 41.  Flash memory cards havehigh-capacity storagelaminated inside a smallpiece of plastic Flash flash memory cardsdo not need a drive withmoving parts to operateARCHANA RAI Wednesday, May 01, 2013
  42. 42.  CompactFlash (CF) xD-Picture Card (xD) SmartMedia (SM) Card SecureDigital (SD) cardand MultiMediaCards(MMC) Memory Stick MediaARCHANA RAI Wednesday, May 01, 2013
  43. 43.  Some devices have flash memoryslots into which you slide your flashmemory card Other devices can use an externalflash memory card reader in orderto transfer information A flash memory drive is a flashmemory storage medium for acomputer that is small enough to fitin your pocket and usually plugsdirectly into a USB portARCHANA RAI Wednesday, May 01, 2013
  44. 44. ARCHANA RAI Wednesday, May 01, 2013
  45. 45. 1. How Can I Tell How Many Megapixels MyCamera Should Have to Print Good 8 x10 Photos?2. What Type of Mouse Should I Get forGaming?3. Are Flat Panels and Flat Screens theSame Thing?4. What Should I look for in a Scanner?ARCHANA RAI Wednesday, May 01, 2013
  46. 46.  CompactFlashcard Dot pitch Flash memorycards Flat-panel display Floppy disk Gamepad Gaming wheel Gas plasma displaymonitor Gigabyte Hard disk drive Inkjet printer Input device JoystickARCHANA RAI Wednesday, May 01, 2013
  47. 47.  Kilobyte Laser printer Liquid crystal displaymonitor Megabyte Memory Stick Media Mouse Multifunction printer MultiMediaCard Output device Photo inkjet printer Refresh rate Resolution of aprinter Resolution of ascreen ScannerARCHANA RAI Wednesday, May 01, 2013
  48. 48.  SecureDigital card SmartMedia card Storage drive Stylus Thin film transistordisplay monitor Touchpad Trackball Visible image size Web cam xD-Picture Card Zip diskARCHANA RAI Wednesday, May 01, 2013
  49. 49. 1. Stacking Bytes If a gigabyte were a tree, how high wouldit be?2. Organizing Input and Output DevicesARCHANA RAI Wednesday, May 01, 2013
  50. 50. 1. Choosing a Digital Camera2. Buying Books Can you find cheaper textbooks on theWeb?ARCHANA RAI Wednesday, May 01, 2013
  51. 51. 1. How’s My Driving? Just Pop Out theFlash Memory Card! Parents can now review your driving onceyou’re home2. The All-Seeing Global Positioning System Should you be trackable 24x7?ARCHANA RAI Wednesday, May 01, 2013
  52. 52. 1. Comparing Printers2. Buying a Hard Drive3. Ordering Photos Online How about a smart frame that changesphotos for you?ARCHANA RAI Wednesday, May 01, 2013
  53. 53. 1. Exploring the Use of Web Cams2. Researching DVD Recorders Want to copy TV shows to a DVD?3. Multimedia Controller4. Protect Your Computer fromUnauthorized Use Require a fingerprint check before yourkeyboard will workARCHANA RAI Wednesday, May 01, 2013