• Like
Lesson 3   output devices
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

Lesson 3 output devices

  • 177 views
Published

 

Published in Technology , Business
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
177
On SlideShare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
4
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Output Devices Hardware This icon indicates the slide contains activities created in Flash. These activities are not editable. For more detailed instructions, see the Getting Started presentation. 1 of 9 © Boardworks Ltd 2004
  • 2. Output devices When a computer has finished processing information, the information needs to be output so that it can be used. Monitors: screens or Visual Display Units (VDUs) display the effects of what the user is doing can vary in size and resolution. 2 of 9 Sometimes we just need to see the information, on screen or on paper, so we use a monitor or a printer. Printers: produce a paper copy of the user’s work: a ‘hard copy’ come in three main types: laser, inkjet and dot matrix. Some businesses also use plotters. © Boardworks Ltd 2004
  • 3. When a computer has finished processing information, the information needs to be output so that it can be used. Speakers: are used to output sound, whether music or voice vary a lot in quality. 3 of 9 Sometimes we need to hear the information, so we use loudspeakers or headphones. Headphones: work in the same way as speakers can be cordless. © Boardworks Ltd 2004
  • 4. When a computer has finished processing information, the information needs to be output so that it can be used. Sometimes we want it to control something, so we send a signal to a motor or a switch that is part of another device, like a robotic arm or a computerized sewing machine. 4 of 9 © Boardworks Ltd 2004
  • 5. Output devices – visual and printed 5 of 9 © Boardworks Ltd 2004
  • 6. Output devices – control and sound 6 of 9 © Boardworks Ltd 2004
  • 7. Device suitable for purpose 7 of 9 © Boardworks Ltd 2004
  • 8. Device Benefits CRT Cheapest monitor to buy; gives a sharp picture LCD Slim screen; Used for laptops and digital display TFT Slim screen; quick to refresh because each pixel has its own transistor Speakers Good for loud music; can address a whole room Headphones Can listen without disturbing others; good for private conversation Laser Quick and best quality printer; large paper tray Inkjet Cheap colour printing; good for printing photos Dot matrix Impact printer; good for multi-part forms Plotter Large drawing size; clear lines for technical drawings Control Safe in all conditions; good for repetitive tasks 8 of 9 © Boardworks Ltd 2004
  • 9. Summary There are four kinds of output devices; devices that produce a visual or printed output, those that produce an audio output and others that use control as output. The three main types of monitors at Cathode Ray Tube (CRT), Liquid Crystal Displays (LCD) and Thin Film Transistor (TFT). There are three main types of printers: dot matrix, inkjet and laser. Sound devices include speakers and headphones. Control devices include hydraulics, pneumatics and motors. 9 of 9 © Boardworks Ltd 2004
  • 10. Summary There are four kinds of output devices; devices that produce a visual or printed output, those that produce an audio output and others that use control as output. The three main types of monitors at Cathode Ray Tube (CRT), Liquid Crystal Displays (LCD) and Thin Film Transistor (TFT). There are three main types of printers: dot matrix, inkjet and laser. Sound devices include speakers and headphones. Control devices include hydraulics, pneumatics and motors. 9 of 9 © Boardworks Ltd 2004