Unit 2, Lesson 6 Learning about Peripherals

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Unit 2, Lesson 6 Learning about Peripherals NAF Principles of Information Technology Unit 2, Lesson 6 Learning about Peripherals Copyright © 2007–2016 NAF. All rights reserved.

Peripherals are devices used for computer input and output Why are the objects on this slide called peripherals?

The keyboard is an input device A computer keyboard reports each key press to a software program that interprets the keystrokes. A keyboard also gives commands to the operating system of a computer, such as the Windows Ctrl-Alt-Delete combination, which brings up a task window. What makes a keyboard an “input device”?

Most mice use either optical or laser technology USB wireless optical mouse Trackball mouse What kind of mouse do you have?

Monitors are output devices LCD monitor CRT monitor What makes a monitor an output device? Could an LCD ever be an input device too?

Many games and videos require high-definition (HD) monitors High-definition monitors have better resolution, which means a clearer picture. A pixel (picture element) is the smallest colored dot that can be displayed on the screen. More pixels = more detail. Standard resolution: 1280 x 720 pixels (width x height) High definition: 1920 x 1080 pixels Image retrieved from http://en.wikipedia.org/wiki/File:Resolution_illustration.png on June 6, 2012. Does your monitor have HD? Have you ever noticed the difference between HD and standard resolution?

Printers and scanners add value to systems Multifunction Laser Jet Scanner Inkjet Is a printer an input device or an output device? What about a scanner?

Data storage drives have changed considerably over 20 years 3½ in. floppy drive CD-ROM drive DVD drive Blu-ray drive

External drives give users more storage options DVD drive with laser light DVD drive image retrieved from http://commons.wikimedia.org/wiki/File:Dvd-burning-cutaway3.JPG and reproduced here under the terms of the Creative Commons Attribution 3.0 Unported license. Original photograph taken by Felipe La Rotta in March 2009. Which of these external devices have you used? USB drive

Many peripherals use wireless technology

Tower cases have expansion bays Towers usually have at least one bay for an internal hard disk drive and one bay for an optical drive, such as a DVD or Blu-ray drive. Different sizes and types of drives can all be loaded into the same tower case. What kind of drives do computers in your classroom have?

A dream technology system needs peripherals Keyboard Mouse Monitor Printer Scanner Storage drives Game controllers/joysticks Microphone Speakers