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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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