Chapter 2: Output Devices

Chapter 2: Output Devices

1. Output devices are hardware components that pass data out of a computer system into a format that can be interpreted by humans.

2. Screens

   • A traditional monitor can be used with a desktop computer to display what is currently in use.
   • Displays are used in:
     • Projectors for use with a large audience such as a class, church congregation or concert audience
     • Tablet and mobile phone screens for portability
     • Televisions for showing photos and videos from a computer device.

3. Speaker

   • Sound is needed to listen to instructions, hear warning tones, listen to music, watch videos and have conversations.

4. Lights

   • Lights, including LEDs (Light Emitting Diodes), can be used to provide very basic information from a computer system.

5. Printers

   • Printers are needed to produce a hard copy (physical) output from a computer system.
   • Laser printers
     • Highest quality, print fastest, low running costs (less than 2ppp)
   • Inkjet Printers: squirt ink onto paper
     • Cheap to purchase compared to laster, high running costs due to cost of ink, ink may smudge
   • Dot Matric Printers
     • Hit (impact) a ribbon which in turn hits the paper and makes a mark on the page.
     • Printing on duplicate or triplicate paper
   • Plotters
     • Used for drawing large images

Imagens e arquivos do mapa