GCSE CS (2210) / IGCSE CS (0478) P1 NOTES Chapter 1.3: Hardware and Software 1.3.4 Output Devices
GCSE CS (2210) / IGCSE CS (0478) P1 NOTES Chapter 1.3: Hardware and Software 1.3.4 Output Devices
GCSE CS (2210) / IGCSE CS (0478) P1 NOTES Chapter 1.3: Hardware and Software 1.3.4 Output Devices
1. INKJET PRINTER
-A print head which consists of nozzles which spray droplets of ink on to the paper to form
characters
-An ink cartridge for each colour (blue, yellow and magenta) and a black cartridge or one
single cartridge containing all three colours+black
-A stepper motor and belt which moves the print head assembly across the page from side
to side
-A paper feed which automatically feeds the printer with pages as they are required
-Uses thermal bubble and piezoelectric technology to produce a hard copy
-Use hundreds of tiny guns to propel ink droplets on paper
-Characters printed are made up of drops of ink
-Ink tank supplies ink to an ink dispenser
-Drop of ink from the tank stays at the end of dispenser tube
-When a droplet is to be propelled, circuit energizes the piezoelectric crystal
-Crystal is pushed against a membrane which pushes it to the outlet of ink dispenser
-Droplet comes out from the dispenser onto the paper
-Application: photographs
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GCSE CS (2210) / IGCSE CS (0478) P1 NOTES BY AWAB AQIB
CHAPTER 1.3: HARDWARE AND SOFTWARE
1.3.4 Output Devices
2. LASER PRINTER
-Differ greatly from inkjet printers in the way they print pages
-They use dry powder ink rather than liquid ink and make use of the properties
of static electricity to produce the text and images
-Unlike inkjet printers, laser printers print the whole page in one go (inkjet printers print the
page line by line)
-Electrically charged powdered ink is transferred onto paper
-Uses negatively charged images on a rotating drum
-and positively charged toner to output a hard copy
-Inkjet are best for only a few pages of good quality, colored printing
-Inkjet has small ink cartridges and small paper trays
-Laser printers produce high quality printouts and are very fast when making multiple copies
of a document; any application that needs high-volume printing
(in color or monochrome) would choose the laser printer
-A large number of high quality flyers or posters would be ideal for laser printer
-They have large toner cartridges and large paper trays
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GCSE CS (2210) / IGCSE CS (0478) P1 NOTES BY AWAB AQIB
CHAPTER 1.3: HARDWARE AND SOFTWARE
1.3.4 Output Devices
3. 3D PRINTER
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GCSE CS (2210) / IGCSE CS (0478) P1 NOTES BY AWAB AQIB
CHAPTER 1.3: HARDWARE AND SOFTWARE
1.3.4 Output Devices
Applications
-printing prototype from CAD
-printing physical model from a blueprint
-building aerospace prototypes
-prosthetic limbs
4. 2D CUTTER
5. 3D CUTTER
-Similar to 2D Cutter but the laser can cut through x-y-z plane
-can be used to cut through glass, crystal, polymer
-not all materials that can be processed through 3D cutting can be used in 3D printing
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GCSE CS (2210) / IGCSE CS (0478) P1 NOTES BY AWAB AQIB
CHAPTER 1.3: HARDWARE AND SOFTWARE
1.3.4 Output Devices
Speakers:
-Sound is produced from a computer by passing the digital data through a Digital to
Analogue Converter (DAC)
-Then through an Amplifier; finally the sound emerges from a Loudspeaker
-Outputs the sound produced by the computer to the user
-Used to listen audios, videos
Headphones:
-Can give instructions to user with motor disabilities or read text aloud
-Digital sound signals produced by computer passes through a Digital to Analogue Converter
-Then passed through an amplifier to make sound louder
-Output through speakers
7.ACTUATORS
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GCSE CS (2210) / IGCSE CS (0478) P1 NOTES BY AWAB AQIB
CHAPTER 1.3: HARDWARE AND SOFTWARE
1.3.4 Output Devices
awabaqibb@gmail.com https://www.youtube.com/c/awabaqib/
GCSE CS (2210) / IGCSE CS (0478) P1 NOTES BY AWAB AQIB
CHAPTER 1.3: HARDWARE AND SOFTWARE
1.3.4 Output Devices
awabaqibb@gmail.com https://www.youtube.com/c/awabaqib/
GCSE CS (2210) / IGCSE CS (0478) P1 NOTES BY AWAB AQIB
CHAPTER 1.3: HARDWARE AND SOFTWARE
1.3.4 Output Devices
9. PROJECTORS
2. LCD Projector
-White light propelled from the LED inside the projector
-Light reflected at different wavelengths by mirrors
-Those wavelengths represent RGB colors
-The 3 color components pass through 3 LCD screens
-Using these colors, grey images are converted into RGB colors
-Images then combined through a prism to produce full color image
-Colored image projected onto the screen
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GCSE CS (2210) / IGCSE CS (0478) P1 NOTES BY AWAB AQIB
CHAPTER 1.3: HARDWARE AND SOFTWARE
1.3.4 Output Devices
SUMMARY
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