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Input, Output, and StorageWhat Kinds of Peripheral Devices Would Suit Your Needs? Chapter 5
Student Learning OutcomesList 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
Student Learning Outcomes5. 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
©2003 The McGraw-Hill CompaniesIntroduction 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
What Peripheral Devices Suit Your Needs?Input Devices Output Devices Storage Devices 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. ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill Companies5.1 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 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. SimNet Concepts Support CD: “Overview of Input Devices” and “Other Everyday Input Devices” p Fig. 5-1 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesInput 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 Fig. 5-2 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesTypes of Input Devices p Fig. 5-2 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesPointing 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 Fig. 5-2 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesPointing 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 & P Fig. 5-3 & Fig 5.4 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesGame Controller Game controllers are used mainly to play games Types of gaming devices Gamepads Joysticks Gaming wheels Force feed p Fig. 5-5 ©2003 The McGraw-Hill Companies
Specialized Input DevicesOther types of input devices include: Scanners Styluses Microphones Digital cameras Web cams p Fig. 5-6 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesScanner 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” ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesStyluses 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 Fig. 5-6 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesMicrophones 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
©2003 The McGraw-Hill CompaniesDigital 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
©2003 The McGraw-Hill CompaniesWeb Cams Web cam is a video camera that can be used to take images for uploading to the Web ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill Companies5.2 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
Flat Panel Display DevicesDevices with flat-panel displays Tablet PCs PDAs Cellular phones Desktop computers ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesMonitors CRTs Flat-panel displays Gas plasma LCD (liquid crystal display) Passive matrix Active matrix Called TFT (thin film transistor) Separate transistor for every pixel 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. SimNet Concepts Support CD: “Monitors” p Fig. 5-9 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesScreen 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 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesPrinters 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 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. ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesPrinters - 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 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. ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesPrinters - 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 Fig. 5-11 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesSpeakers 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 ©2003 The McGraw-Hill Companies
I•Can: Use a Computer Without Neck and Shoulder PainComputer work can lead to physical problems Ergonomics – deals with reducing discomfort Should sit up straight at your computer 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. SimNet Concepts Support CD: “Ergonomics” ©2003 The McGraw-Hill Companies
Using Your Computer: Ergonomics and HealthPosition 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
Using Your Computer: Ergonomics and HealthStretch 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
©2003 The McGraw-Hill Companies5.3 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 Ask students to give you other examples of storage devices. SimNet Concepts Support CD: “Storage Concepts” ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesStorage 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 ©2003 The McGraw-Hill Companies
Magnetic and Optical StorageComputer storage is either magnetic or optical. p & Fig & 5.16 ©2003 The McGraw-Hill Companies
Magnetic Storage Devices: Internal Magnetic Hard DiskMagnetic 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
Magnetic Storage Devices: Internal Magnetic Hard DiskInternal 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 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. ©2003 The McGraw-Hill Companies
Magnetic Storage Devices: External Magnetic Hard DiskExternal 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
©2003 The McGraw-Hill CompaniesHard 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 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. ©2003 The McGraw-Hill Companies
Floppy Disks and Zip DisksRemovable 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 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. ©2003 The McGraw-Hill Companies
Removable Magnetic Storage: Floppy DiskFloppy 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 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. p Fig. 5.15 ©2003 The McGraw-Hill Companies
Removable Magnetic Storage: Zip DiskHigh 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 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. ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesOptical Storage CDs DVDs Both are optical storage and have three formats: Read-only Write-once Read-and-write 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 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesOptical 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 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. SimNet Concepts Support CD: “CDs and DVDs” ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesFlash 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 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. ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesFlash 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
Flash Memory Card ReadersSome 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
©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill Companies5.4 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
©2003 The McGraw-Hill Companies5.5 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 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill Companies5.6 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 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill Companies5.6 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 ©2003 The McGraw-Hill Companies
©2003 The McGraw-Hill CompaniesReview 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
Hands On Projects E-CommerceChoosing 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
Hands On Projects Ethics, Security & PrivacyHow’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? ©2003 The McGraw-Hill Companies
Hands On Projects on the WebComparing Printers Buying a Hard Drive Ordering Photos Online How about a smart frame that changes photos for you? ©2003 The McGraw-Hill Companies
Hands On Projects Group ActivitiesExploring 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 ©2003 The McGraw-Hill Companies
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