Unit B: Computer
Hardware
Computer Concepts – Illustrated 9th Edition 2
Learning Objectives
Identify and describe how to use input
devices
Name diff...
Computer Concepts – Illustrated 9th Edition 3
Learning Objectives (continued)
Explain the advantages and disadvantages
of ...
4
Input Devices
Keyboards:
 Type letters and numbers
 Navigation keypad – Moves the insertion
point
Mouse:
 Controls on...
Computer Concepts – Illustrated 9th Edition 55
Figure B-1: Keyboard examples
Computer Concepts – Illustrated 9th Edition 6
Input Devices (continued)
Other pointing devices:
 Pointing stick
 Touchpa...
Computer Concepts – Illustrated 9th Edition 7
Display Devices
Monitor:
 Standalone display device
 Found with desktop co...
Computer Concepts – Illustrated 9th Edition 8
Display Devices (continued)
LCD (liquid crystal display):
 Manipulates ligh...
Computer Concepts – Illustrated 9th Edition 9
Figure B-6: Examples of monitors
Computer Concepts – Illustrated 9th Edition 10
Display Devices (continued)
Graphics card:
 Contains circuitry that displa...
Computer Concepts – Illustrated 9th Edition 11
Display Devices (continued)
Screen size:
 Measured diagonally in inches
Vi...
Computer Concepts – Illustrated 9th Edition 12
Printers
Hardcopy:
 Printed output
Softcopy:
 Output viewed digitally
Computer Concepts – Illustrated 9th Edition 13
Printers (continued)
Ink-jet printer:
 Sprays ink onto paper
Laser printer...
Computer Concepts – Illustrated 9th Edition 14
Figure B-9: An ink jet printer Figure B-10: A laser printer
Computer Concepts – Illustrated 9th Edition 15
Printers (continued)
Printer resolution:
 Determines the quality of printe...
Computer Concepts – Illustrated 9th Edition 16
Data Storage – An Overview
Storage technology - Data storage system:
 Allo...
Computer Concepts – Illustrated 9th Edition 17
Figure B-12: Examples of storage media and storage devices
Computer Concepts – Illustrated 9th Edition 18
Data Storage – An Overview
(continued)
Hard drives – Internal or External:
...
Computer Concepts – Illustrated 9th Edition 19
Figure B-13: Inside of a mechanical hard drive
Computer Concepts – Illustrated 9th Edition 20
Data Storage – An Overview
(continued)
Connections:
 Drive bays or expansi...
Computer Concepts – Illustrated 9th Edition 21
Data Storage Systems Features
Storage capacity:
 Maximum amount of data th...
Computer Concepts – Illustrated 9th Edition 22
Data Storage Systems Features
(continued)
Access time:
 Average time to lo...
Computer Concepts – Illustrated 9th Edition 23
Data Storage Systems Features
(continued)
Random access – Direct access:
 ...
Computer Concepts – Illustrated 9th Edition 24
Figure B-16: Magnetic storage
Computer Concepts – Illustrated 9th Edition 25
Data Storage Systems Features
(continued)
Solid-state storage:
 Data store...
Computer Concepts – Illustrated 9th Edition 26
Figure B-16: Optical storage
Computer Concepts – Illustrated 9th Edition 27
Optical Data Storage Systems
CD-ROM – Read-only technology:
 DVD-ROM, BD-R...
Computer Concepts – Illustrated 9th Edition 28
Figure B-20: How an optical drive works
Computer Concepts – Illustrated 9th Edition 29
Solid-State Data Storage Systems
Solid-state storage technology:
 Stores d...
Computer Concepts – Illustrated 9th Edition 30
Figure B-23: Solid state cards
Figure B-26: Examples of solid-state drives
Computer Concepts – Illustrated 9th Edition 31
Solid-State Data Storage Systems
(continued)
Card reader:
 Required to tra...
Computer Concepts – Illustrated 9th Edition 32
How to Add Devices to Your
Computer
Expansion card:
 Small circuit board a...
Computer Concepts – Illustrated 9th Edition 33
How to Add Devices to Your
Computer (continued)
Expansion port:
 Part of e...
Computer Concepts – Illustrated 9th Edition 34
Figure B-27: Common expansion ports
Computer Concepts – Illustrated 9th Edition 35
How to Add Devices to Your
Computer (continued)
Data bus:
 Circuits over w...
Computer Concepts – Illustrated 9th Edition 36
Figure B-28: How the expansion bus works
Computer Concepts – Illustrated 9th Edition 37
How to Add Devices to Your
Computer (continued)
Device driver:
 Software c...
Computer Concepts – Illustrated 9th Edition 38
Talking Points: Why Recycle
Computers?
U.S. landfills already hold more tha...
Computer Concepts – Illustrated 9th Edition 39
Figure B-31: Creative use of old computer parts
Computer Concepts – Illustrated 9th Edition 40
Summary
This unit introduced:
 Input Devices
 Display Devices
 Printers
...
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Computer Concepts Unit B 2013

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Computer Concepts Unit B 2013

  1. 1. Unit B: Computer Hardware
  2. 2. Computer Concepts – Illustrated 9th Edition 2 Learning Objectives Identify and describe how to use input devices Name different types of display devices, and explain their key features Describe different types of printers, and explain the advantages and disadvantages of each type Identify and explain the different storage devices and their corresponding storage media 2
  3. 3. Computer Concepts – Illustrated 9th Edition 3 Learning Objectives (continued) Explain the advantages and disadvantages of magnetic, optical, and solid-state storage systems Explain when you might choose a CD, DVD, or BD based on your storage needs Describe the different types of solid-state cards and drives available today Identify expansion ports and expansion cards, and explain how to use them 3
  4. 4. 4 Input Devices Keyboards:  Type letters and numbers  Navigation keypad – Moves the insertion point Mouse:  Controls on-screen pointer  Optical mouse  Laser mouse Computer Concepts – Illustrated 9th Edition 4
  5. 5. Computer Concepts – Illustrated 9th Edition 55 Figure B-1: Keyboard examples
  6. 6. Computer Concepts – Illustrated 9th Edition 6 Input Devices (continued) Other pointing devices:  Pointing stick  Touchpad (also called a trackpad)  Trackball  Touch screen Other ways to input data:  Scanner  Microphone  Digital camera
  7. 7. Computer Concepts – Illustrated 9th Edition 7 Display Devices Monitor:  Standalone display device  Found with desktop computers Screen:  Area where output is displayed • Monitors attached to desktop computers have screens • Notebook computers have screens, but not monitors
  8. 8. Computer Concepts – Illustrated 9th Edition 8 Display Devices (continued) LCD (liquid crystal display):  Manipulates light within a layer of liquid crystal cells  Also called flat-panel displays LED (light emitting diodes) OLED (organic light emitting diodes):  Used by most handheld devices  Draws less power than LCD screens  Can be seen from any angle
  9. 9. Computer Concepts – Illustrated 9th Edition 9 Figure B-6: Examples of monitors
  10. 10. Computer Concepts – Illustrated 9th Edition 10 Display Devices (continued) Graphics card:  Contains circuitry that displays images  Response rate: • Speed at which screens update displays  Pixel (picture element): • Smallest unit in a graphic image  Resolution: • Maximum number of displayed horizontal and vertical pixels
  11. 11. Computer Concepts – Illustrated 9th Edition 11 Display Devices (continued) Screen size:  Measured diagonally in inches Viewing angle width:  Distance to sides you can still clearly view image Dot pitch (dp):  Measure of image clarity Color depth or bit depth:  Number of colors displayed by monitors and graphics cards
  12. 12. Computer Concepts – Illustrated 9th Edition 12 Printers Hardcopy:  Printed output Softcopy:  Output viewed digitally
  13. 13. Computer Concepts – Illustrated 9th Edition 13 Printers (continued) Ink-jet printer:  Sprays ink onto paper Laser printer:  Produces dots of light on light-sensitive drum that toner adheres to
  14. 14. Computer Concepts – Illustrated 9th Edition 14 Figure B-9: An ink jet printer Figure B-10: A laser printer
  15. 15. Computer Concepts – Illustrated 9th Edition 15 Printers (continued) Printer resolution:  Determines the quality of printed output  Measured in dots per inch (or dpi) Printer speed:  Pages per minute (ppm) Duplex printer:  Prints on both sides of paper Network-enabled printer Photo printer
  16. 16. Computer Concepts – Illustrated 9th Edition 16 Data Storage – An Overview Storage technology - Data storage system:  Allows for a computer or digital device to store and retrieve data Storage medium:  Holds data – Hard drive, tape, memory card, flash drive, CD, DVD, etc. Storage device:  Stores and retrieves data from its storage medium – CD/DVD drive.
  17. 17. Computer Concepts – Illustrated 9th Edition 17 Figure B-12: Examples of storage media and storage devices
  18. 18. Computer Concepts – Illustrated 9th Edition 18 Data Storage – An Overview (continued) Hard drives – Internal or External:  Main storage system for PCs  Mechanical or solid state drives (SSD) • Solid state technology – No moving parts Additional storage devices:  USB flash drives  CD/DVD/BD drives  Solid-state card readers
  19. 19. Computer Concepts – Illustrated 9th Edition 19 Figure B-13: Inside of a mechanical hard drive
  20. 20. Computer Concepts – Illustrated 9th Edition 20 Data Storage – An Overview (continued) Connections:  Drive bays or expansion slots  USB ports Figure B-14: Drive bays
  21. 21. Computer Concepts – Illustrated 9th Edition 21 Data Storage Systems Features Storage capacity:  Maximum amount of data that can be stored  Measured in megabytes (MB), gigabytes (GB), or terabytes (TB)
  22. 22. Computer Concepts – Illustrated 9th Edition 22 Data Storage Systems Features (continued) Access time:  Average time to locate data on the storage medium and read it  Measured in milliseconds (thousandths of a second, abbreviated as ms) Data transfer rate:  Amount of data moved from the storage medium per second.
  23. 23. Computer Concepts – Illustrated 9th Edition 23 Data Storage Systems Features (continued) Random access – Direct access:  Device can jump directly to the requested data Sequential access:  Device reads through data from the beginning to the end Magnetic storage:  Stores data by magnetizing microscopic particles on the disk or tape surface  Hard drives and tapes
  24. 24. Computer Concepts – Illustrated 9th Edition 24 Figure B-16: Magnetic storage
  25. 25. Computer Concepts – Illustrated 9th Edition 25 Data Storage Systems Features (continued) Solid-state storage:  Data stored in a nonvolatile, erasable, low- power chip  Used in compact storage cards – memory cards, thumb drives – flash drives, memory sticks, and some hard drives Optical storage:  Data stored as microscopic light and dark spots on the disc surface  CDs, DVDs, and BDs
  26. 26. Computer Concepts – Illustrated 9th Edition 26 Figure B-16: Optical storage
  27. 27. Computer Concepts – Illustrated 9th Edition 27 Optical Data Storage Systems CD-ROM – Read-only technology:  DVD-ROM, BD-ROM CD-R – CD recordable technology:  DVD-R/DVD+R, BD-R CD-RW - CD rewritable technology:  DVD-RW/DVD+RW, BD-RE A computer system can have a CD drive, DVD drive, or BD drive
  28. 28. Computer Concepts – Illustrated 9th Edition 28 Figure B-20: How an optical drive works
  29. 29. Computer Concepts – Illustrated 9th Edition 29 Solid-State Data Storage Systems Solid-state storage technology:  Stores data in a nonvolatile, erasable, low- power chip/electronic circuit  Used in digital cameras, MP3 players, etc., or for transporting data Wide range of solid-state memory cards:  CompactFlash (CF) cards  SecureDigital (SD) cards  Memory stick
  30. 30. Computer Concepts – Illustrated 9th Edition 30 Figure B-23: Solid state cards Figure B-26: Examples of solid-state drives
  31. 31. Computer Concepts – Illustrated 9th Edition 31 Solid-State Data Storage Systems (continued) Card reader:  Required to transfer data to or from solid- state storage cards USB flash drives and solid-state drives (SSD):  Incorporate memory and reader into one device  Easily transportable from one computer to another
  32. 32. Computer Concepts – Illustrated 9th Edition 32 How to Add Devices to Your Computer Expansion card:  Small circuit board allowing computers to communicate with a peripheral devices Expansion slot:  Slot on motherboards where expansion cards are plugged Figure B-29: An expansion card slides into an expansion slot
  33. 33. Computer Concepts – Illustrated 9th Edition 33 How to Add Devices to Your Computer (continued) Expansion port:  Part of expansion card  Connector passing data between a computer and a peripheral device • Graphics ports, FireWire ports, Ethernet network ports, USB ports, etc.
  34. 34. Computer Concepts – Illustrated 9th Edition 34 Figure B-27: Common expansion ports
  35. 35. Computer Concepts – Illustrated 9th Edition 35 How to Add Devices to Your Computer (continued) Data bus:  Circuits over which data is transmitted to peripheral devices RAM (Random access memory):  Volatile main memory Expansion bus:  Segment of the data bus between RAM and the peripheral devices
  36. 36. Computer Concepts – Illustrated 9th Edition 36 Figure B-28: How the expansion bus works
  37. 37. Computer Concepts – Illustrated 9th Edition 37 How to Add Devices to Your Computer (continued) Device driver:  Software controlling communication with peripheral devices or expansion cards USB (universal serial bus) port:  Used for connecting many peripheral devices
  38. 38. Computer Concepts – Illustrated 9th Edition 38 Talking Points: Why Recycle Computers? U.S. landfills already hold more than 2 million tons of computer parts:  Computer parts contain toxic substances, such as lead, phosphorus, and mercury Better options for disposing of computers:  Sell it, donate it, recycle it, or send it back to the manufacturer About half the states in the U.S. have taken legislative action to deal with the problem
  39. 39. Computer Concepts – Illustrated 9th Edition 39 Figure B-31: Creative use of old computer parts
  40. 40. Computer Concepts – Illustrated 9th Edition 40 Summary This unit introduced:  Input Devices  Display Devices  Printers  Data Storage—An Overview  Data Storage Systems Features  Optical Data Storage Systems  Solid-State Data Storage Systems  How to Add Devices to Your Computer 40

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