part 1 - chapter 3 1 input and output devices. devices/brainstorming-activity
TRANSCRIPT
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PART 1 - CHAPTER 3
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Input and output devices
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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
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Keyboard5
Suitable for: Data entry Typing documents
Not suitable for: Drawing
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Mouse6
Suitable for: Selecting items Highlighting text Clicking buttonswheel
scrolling
left buttonClicking, selecting, dragging
right buttonViewing the context menu
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Laser Pen and Graphics Tablet7
Ideal for drawing
light Pen graphics Tablet
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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
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Digital Camera9
Uses digital sensor instead of film
Stores images on flash memory
Images can be viewed right away
LCD screen
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Webcam10
Records low quality video
Used for: Videoconferencing Chatting
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Microphone11
Like a normal microphone only smaller
Used for: Videoconferencing Chatting online Recording audio Giving voice commands
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Optical Mark Reader (OMR)12
Reads pen and pencil marks on formsUsed for surveys and multiple-choice Fast but gets confused by improper
shading
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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
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Output Devices14
Devices that allow you to get information out of the computer
Examples: Monitors (Screens) Speakers Printers Multimedia projectors
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Barcode Scanner15
Used in supermarkets and retail storesIdentifies items by scanning barcodes
Computer system then retrieves prices
Faster and more accurate
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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
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Printer20
Produces hard copy output on paper4 main types:
Inkjet Laser Dot-matrix Thermal
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Inkjet Printer21
Squirt tiny ink droplets on paper
High quality images and text
Prints quickly
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Laser Printer22
Uses laser to fuse toner to paper
Fastest type of printer
Highest quality textExpensive
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Dot-matrix Printer23
Works almost like a typewriter
Uses inked ribbonSlow and noisyCan print in
duplicate using carbon paper
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Thermal Printer24
Applies heat to heat-sensitive paperLow quality outputCheap to operateUsed:
To print receipts and movie tickets In some fax machines
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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
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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
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Speakers27
Produce audio outputLike normal speakers but smallerPlug into the computer’s sound card
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Multimedia Projector28
Connects to your PCUses lens to project
images on to a wall or board
Used for presentations
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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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