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Hardware Basics:
  Peripherals
         Miguel Rebollo

Introduction to Computer Science
            2009-2010
Aims
• Know common input devices and their
  roles in getting different types of inform.
• Know output devices and the way htey
  make computers more useful
• Know the functionality of different types of
  storage devices
• Explain the ways the components of a
  computer fit together
               4626. Introd to Computer Science
Outline

1. Input Devices
2. Output Devices
3. Storage Devices
4. Computer Systems: The Sum of Their Parts



              4626. Introd to Computer Science
Input devices
                   Keyboard

• Most familiar input device
• They can be…
 • QWERTY
                                                  half keyboard (web site)



 • ergonomic                                      frogpad (web site)

 • wireless

               4626. Introd to Computer Science
Input devices
             Pointing devices

• Mouse (touchpad, pointing stick, trackball)
• Joystick
• Graphics tablet
• Touch screen


               4626. Introd to Computer Science
Input devices
                      Reading tools
•   They read specific marks representing codes

•   Examples:

    •   optical-mark, mag. ink, bar-code

    •   OCR (optical char. recognition)

    •   smart whiteboards

    •   QR codes


                                                         example of QR code in a poster
                      4626. Introd to Computer Science
Input devices
       Digitalising the real world
• Scanners (flatbed, slide, drum, sheet-fed)
• Digital camera: snapshots as digital images
• Video digitaliser card: capture video signals
• Videoconferencing devices
• Audio digitalisers and speech recog. systems
• Sensors: real world magnitudes
               4626. Introd to Computer Science
Output devices
                           Screen

•   Connected through a video adapter

•   VRAM: specialised memory for graphics

•   Monitor

    •   technology: CRT or LCD

    •   size (inches): diagonal line across the screen

    •   resolution: No. of pixels displayed            How the
    •   color depth: No. of different colours          image is
                                                       formed?
                    4626. Introd to Computer Science
Output devices
                      Paper output


• multifunction:                       Impact            Non-impact
  printer + scanner
                                                           ink-jet
• plotter:                                line
  large blueprints                                          laser
  and maps                         dot-matrix            sublimation
  (A0 sized)



                      4626. Introd to Computer Science
Output devices
•   Fax machines

•   Sound: sound cards and
    synthesizers

•   Controlling machines

    •   robot arms

    •   transportation
        devices

    •   automated factory
        equipment

                     4626. Introd to Computer Science
Storage devices (I/O)
                         Magnetic


                                              •    large capacity at low
                                                   cost


                                      Tapes   •
                                              •
                                                   sequential access

                                                   appropriate for
TS3400 tape library (IBM)                          backups
  Until 37 tB of space




                    4626. Introd to Computer Science
Storage devices (I/O)
                 Magnetic


 • Random data access
         Discs
 • non-removable: HARD DISK
 • removable: floppy disks, REV disks


            4626. Introd to Computer Science
Storage devices (I/O)
                      Optical

• uses laser beams to r/w bits on its surface
• cd-based media: CD-R, CD-RW
• dvd-based media
 • DVD-RAM, only for data
 • DVD-R, DVD+R, DVD-RW, DVD+RW

               4626. Introd to Computer Science
Storage devices (I/O)
                   Solid state


• also known as flash memory
• without moving parts
• from 16mB to 16 gB
• replacement of HD in laptops?

                4626. Introd to Computer Science
Computer Systems
Typical personal computers
 • Tower systems
 • Flat desktop systems
 • All-in-one systems                                 Entertainment
 • Portable computers                                   •  Barebones
                                                        • Media center

                   4626. Introd to Computer Science
...the sum of its parts
                        Ports and slots

•   serial port:
    one bit at a time
    (modem)

•   parallel port:
    bits in groups
    (printer)

•   keyboard/mouse
    ports (PS/2)



                        4626. Introd to Computer Science
...the sum of its parts
                 External connections
•   video port
    to the monitor
    (VGA, DVI…)

•   sound ports:
    microphone,
    speakers,
    headphones, MIDI

•   LAN: Ethernet or
    wireless


                       4626. Introd to Computer Science
...the sum of its parts
                            Easy expansion
•   Hot plug-in

    •   USB 1.1 and 2.0
        (Universal Serial Bus)

    •   Firewire
        (IEEE 1394)

•   PC has an
    Open Architecture



                             4626. Introd to Computer Science

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Hardware basics: peripherals

  • 1. Hardware Basics: Peripherals Miguel Rebollo Introduction to Computer Science 2009-2010
  • 2. Aims • Know common input devices and their roles in getting different types of inform. • Know output devices and the way htey make computers more useful • Know the functionality of different types of storage devices • Explain the ways the components of a computer fit together 4626. Introd to Computer Science
  • 3. Outline 1. Input Devices 2. Output Devices 3. Storage Devices 4. Computer Systems: The Sum of Their Parts 4626. Introd to Computer Science
  • 4. Input devices Keyboard • Most familiar input device • They can be… • QWERTY half keyboard (web site) • ergonomic frogpad (web site) • wireless 4626. Introd to Computer Science
  • 5. Input devices Pointing devices • Mouse (touchpad, pointing stick, trackball) • Joystick • Graphics tablet • Touch screen 4626. Introd to Computer Science
  • 6. Input devices Reading tools • They read specific marks representing codes • Examples: • optical-mark, mag. ink, bar-code • OCR (optical char. recognition) • smart whiteboards • QR codes example of QR code in a poster 4626. Introd to Computer Science
  • 7. Input devices Digitalising the real world • Scanners (flatbed, slide, drum, sheet-fed) • Digital camera: snapshots as digital images • Video digitaliser card: capture video signals • Videoconferencing devices • Audio digitalisers and speech recog. systems • Sensors: real world magnitudes 4626. Introd to Computer Science
  • 8. Output devices Screen • Connected through a video adapter • VRAM: specialised memory for graphics • Monitor • technology: CRT or LCD • size (inches): diagonal line across the screen • resolution: No. of pixels displayed How the • color depth: No. of different colours image is formed? 4626. Introd to Computer Science
  • 9. Output devices Paper output • multifunction: Impact Non-impact printer + scanner ink-jet • plotter: line large blueprints laser and maps dot-matrix sublimation (A0 sized) 4626. Introd to Computer Science
  • 10. Output devices • Fax machines • Sound: sound cards and synthesizers • Controlling machines • robot arms • transportation devices • automated factory equipment 4626. Introd to Computer Science
  • 11. Storage devices (I/O) Magnetic • large capacity at low cost Tapes • • sequential access appropriate for TS3400 tape library (IBM) backups Until 37 tB of space 4626. Introd to Computer Science
  • 12. Storage devices (I/O) Magnetic • Random data access Discs • non-removable: HARD DISK • removable: floppy disks, REV disks 4626. Introd to Computer Science
  • 13. Storage devices (I/O) Optical • uses laser beams to r/w bits on its surface • cd-based media: CD-R, CD-RW • dvd-based media • DVD-RAM, only for data • DVD-R, DVD+R, DVD-RW, DVD+RW 4626. Introd to Computer Science
  • 14. Storage devices (I/O) Solid state • also known as flash memory • without moving parts • from 16mB to 16 gB • replacement of HD in laptops? 4626. Introd to Computer Science
  • 15. Computer Systems Typical personal computers • Tower systems • Flat desktop systems • All-in-one systems Entertainment • Portable computers • Barebones • Media center 4626. Introd to Computer Science
  • 16. ...the sum of its parts Ports and slots • serial port: one bit at a time (modem) • parallel port: bits in groups (printer) • keyboard/mouse ports (PS/2) 4626. Introd to Computer Science
  • 17. ...the sum of its parts External connections • video port to the monitor (VGA, DVI…) • sound ports: microphone, speakers, headphones, MIDI • LAN: Ethernet or wireless 4626. Introd to Computer Science
  • 18. ...the sum of its parts Easy expansion • Hot plug-in • USB 1.1 and 2.0 (Universal Serial Bus) • Firewire (IEEE 1394) • PC has an Open Architecture 4626. Introd to Computer Science