PART 1 - CHAPTER 3

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Input and output devices

http://teachlogy.wordpress.com/lesson/input-devices/brainstorming-activity/

 

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Objectives

By the end of the lesson you are able to:Define input devicesName at least three input devicesState one function of at least three input

devices

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Input Devices4

Devices that allow you to put information into the computer:

Examples: Keyboards, Mice, Microphones Laser pens, Graphics Tablets Scanners, OMRs, OCRs Digital cameras, Webcams

Keyboard5

Suitable for: Data entry Typing documents

Not suitable for: Drawing

Mouse6

Suitable for: Selecting items Highlighting text Clicking buttonswheel

scrolling

left buttonClicking, selecting, dragging

right buttonViewing the context menu

Laser Pen and Graphics Tablet7

Ideal for drawing

light Pen graphics Tablet

Scanner8

Converts documents to digital images

Saves you from retyping

Must use OCR software if you want to edit the scanned text

a flatbed scanner

Digital Camera9

Uses digital sensor instead of film

Stores images on flash memory

Images can be viewed right away

LCD screen

Webcam10

Records low quality video

Used for: Videoconferencing Chatting

Microphone11

Like a normal microphone only smaller

Used for: Videoconferencing Chatting online Recording audio Giving voice commands

Optical Mark Reader (OMR)12

Reads pen and pencil marks on formsUsed for surveys and multiple-choice Fast but gets confused by improper

shading

Optical Character Reader (OCR)13

Reads characters in printed documentsSaves you from having to retypeTrouble reading low quality textUsed to read

Airline tickets Envelopes Printed bills

Output Devices14

Devices that allow you to get information out of the computer

Examples: Monitors (Screens) Speakers Printers Multimedia projectors

Barcode Scanner15

Used in supermarkets and retail storesIdentifies items by scanning barcodes

Computer system then retrieves prices

Faster and more accurate

Exercises

http://teachlogy.wordpress.com/lesson/input-devices/exercises/

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Closure

Read more about input devices by clicking on the following links:

http://teachlogy.wordpress.com/lesson/input-devices/read-more/

http://teachlogy.wordpress.com/take-a-challenge/input-devices-activity/

http://teachlogy.wordpress.com/revision/http://teachlogy.wordpress.com/lesson/input-

devices/homework/

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Output devices

http://teachlogy.wordpress.com/lesson/input-devices/brainstorming-activity/

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Monitor19

LCD monitor CRT monitor

Printer20

Produces hard copy output on paper4 main types:

Inkjet Laser Dot-matrix Thermal

Inkjet Printer21

Squirt tiny ink droplets on paper

High quality images and text

Prints quickly

Laser Printer22

Uses laser to fuse toner to paper

Fastest type of printer

Highest quality textExpensive

Dot-matrix Printer23

Works almost like a typewriter

Uses inked ribbonSlow and noisyCan print in

duplicate using carbon paper

Thermal Printer24

Applies heat to heat-sensitive paperLow quality outputCheap to operateUsed:

To print receipts and movie tickets In some fax machines

Impact and Non-Impact Printers25

Impact printers: Print by striking the paper For example: dot-matrix

Non-impact printers: Print using other means For example: laser, inkjet, thermal

Page Printers and Line Printers26

Page printer: Appears to print entire page at a time For example: laser and inkjet printers

Line printer appears to print an entire line at a time

Speakers27

Produce audio outputLike normal speakers but smallerPlug into the computer’s sound card

Multimedia Projector28

Connects to your PCUses lens to project

images on to a wall or board

Used for presentations

Questions

What is Output device?Give three examples of output devicesExplain the function of speakerList three different of printerName two different monitor

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Group Discussion

You are to make a group of three. Browse the internet and search for pictures output

devices and functions of:

PlotterProjectorComputer output on microfilm

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Exercise

http://teachlogy.wordpress.com/lesson/Output-devices/exercises/

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