1. Computer Concepts Module 2
Computer Hardware

2. Learning Objectives (Slide 1 of 2)
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 the advantages and disadvantages of each
Identify and explain the different storage devices and their corresponding storage media
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3. Learning Objectives (Slide 2 of 2)
Explain the advantages and disadvantages of magnetic, optical, and solid-state storage systems
Explain optical storage options
Describe the different types of solid-state cards and drives
Identify expansion ports and expansion cards, and explain how to use them
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4. Input Devices (Slide 1 of 3)
Keyboards
Type letters and numbers
Navigation keypad – Moves the insertion point
Mouse
Controls on-screen pointer
Optical mouse
Laser mouse
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5. Input Devices (Slide 2 of 3)
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6. Input Devices (Slide 3 of 3)
Other pointing devices
Touchpad (also called a trackpad)
Trackball
Touch screen
Virtual keyboard
Gestures (tap, drag, pinch)
Other ways to input data
Scanner
Microphone
Digital camera
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7. Display Devices (Slide 1 of 4)
Monitor
Standalone display device
Found with desktop computers
Screen
Area where output is displayed
Monitors attached to desktop computers have screens
Notebook, netbook, tablet, smartphone and other mobile devices have screens
LCD (liquid crystal display) Manipulates light within a layer of liquid crystal cells
LED (light emitting diodes)
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8. Display Devices (Slide 2 of 4)
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
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9. Display Devices (Slide 3 of 4 )
Screen size
Measured diagonally in inches
Aspect ratio
Proportional relation between width and height
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10. Display Devices (Slide 4 of 4)
Comparing Aspect Ratios
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11. Printers (Slide 1 of 3) Hard copy Soft copy Ink-jet printer
Printed output
Soft copy
Output viewed with a display device
Ink-jet printer
Sprays ink onto paper
Laser printer
Toner cartridges
Produces dots of light on light-sensitive drum
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12. Printers (Slide 2 of 3) Ink-jet Laser
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13. Printers (Slide 3 of 3) Printer resolution Printer speed
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
3D printer
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14. Data Storage— An Overview (Slide 1 of 3)
Storage device
Equipment that stores and retrieves data from its storage medium
Hard drive, card reader, flash drive, optical drive, solid-state card readers
Storage medium
Technology that holds data
Hard drives, memory cards, flash drives, CDs, DVDs, Blue-ray discs
Can be two separate parts or self-contained
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15. Data Storage— An Overview (Slide 2 of 3)
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
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16. Data Storage— An Overview (Slide 3 of 3)
Inside a mechanical hard drive
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17. Data Storage Systems Features (Slide 1 of 2)
Storage capacity
Maximum amount of data that can be stored
Measured in megabytes (MB), gigabytes (GB), or terabytes (TB)
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.
Random access (direct access)
Device can jump directly to the requested data
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18. Data Storage Systems Features (Slide 2 of 2)
Magnetic storage
Stores data by magnetizing microscopic particles on the disk or tape surface
Hard drives
Optical storage
Data stored as microscopic light and dark spots on the disc surface
CDs, DVDs, and BDs
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
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19. Optical Data Storage Systems (Slide 1 of 1)
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
Not a replacement for a hard drive
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20. Solid-State Data Storage Systems (Slide 1 of 2)
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 card
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21. Solid-State Data Storage Systems (Slide 2 of 2)
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
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22. How to Add Devices to Your Computer (Slide 1 of 4)
Expansion card:
Small circuit board allowing computers to communicate with a peripheral devices
Expansion slot:
Slot on motherboards where expansion cards are plugged
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.
Motherboard or main circuit board
Integrated circuits are connected to the motherboard
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23. How to Add Devices to Your Computer (Slide 2 of 4)
Expansion ports
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24. How to Add Devices to Your Computer (Slide 3 of 4)
Data bus
Circuits over which data is transmitted to peripheral devices
RAM (Random access memory)
Volatile main memory
Device driver
Software controlling communication with peripheral devices or expansion cards
USB (universal serial bus) port
Used for connecting many peripheral devices
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