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Output Devices - Coggle Diagram
Output Devices
Laser printer
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A printer drum is given a positive charge and hence rotates.A laser beam is scanned across the drum removing positive charge in some areas. :
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3D Printers
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Materials used: powdered resin/metal, paper, ceramic powder
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Direct 3D printing :Some use inkjet technology.The print head can move to the left and right like usual but also up and down.
Binder 3D printing: Similar to direct 3D printing. 2 passes occur for each layer.1st pass sprays dry powder while second pass sprays binder(glue) to form a layer.
Uses: prosthetic limbs,in fashion/art,aerospace,etc
Inkjet printer
It consists of: A printer head with nozzles to spray ink droplets
Black/ coloured cartridges
A motor and stepper belt to move the printer head
A paper feed which provides papers when
required
Thermal bubble-Resistors create heat which causes the ink to vaporise . The ink forms a bubble.When this expands some ink is ejected onto the paper.
Piezoelectric-A crystal is located at the back of each nozzles ink reservoir.A tiny electric charge causes it to vibrate and therefore eject ink onto paper.
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Actuators
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Eg:relay,solenoid,motor,valve
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2D/3D cutter
They work in similar ways.The 3D can recognize an object in x,y,z coordinates not just x,y like a 2D cutter
Material that could be cut:glass,metal,wood,polymer,crystal
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Loudspeakers/headphones
Sound is produced by a computer when digital date passes through a digital to analogue converter(DAC)
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Projectors
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LCD projectors
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The 3 different coloured lights passe through 3 LCD screens ,the screen shows the image to be pixels in grey scale
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Monitors
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LED-Light Emitting Diode
The image is brighter,sharper,more vivid and has good contrast.
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