Hardware basics: peripherals

9,563 views

Published on

Published in: Technology
3 Comments
7 Likes
Statistics
Notes
No Downloads
Views
Total views
9,563
On SlideShare
0
From Embeds
0
Number of Embeds
245
Actions
Shares
0
Downloads
1,059
Comments
3
Likes
7
Embeds 0
No embeds

No notes for slide

Hardware basics: peripherals

  1. 1. Hardware Basics: Peripherals Miguel Rebollo Introduction to Computer Science 2009-2010
  2. 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. 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. 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. 5. Input devices Pointing devices • Mouse (touchpad, pointing stick, trackball) • Joystick • Graphics tablet • Touch screen 4626. Introd to Computer Science
  6. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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

×