What do output devices do?
• Output devices take data produced by a computer and turn it into a human readable form.
How do operating costs of inkjet printers work?
- Inkjet printers are sold at below production cost.
* Cost of ink cartridges are marked up.
How do inkjet printers work?
- Spraying minute dots of ink onto paper to create an image.
- Depending on the resolution of the model, number of colour cartridges used, and the quality of the paper, the final product can vary in quality.
What are some advantages of inkjet over laser printers?
• Inkjets are cheaper to buy initially.
How do dot matrix/impact printers work?
Print head has a matrix of pins which strike the surface of the paper through an inked ribbon to form letters.
What are some advantages of dot matrix printers?
- Can operate in damp or dirty environments.
* Useful where multi part stationary is required
What are some disadvantages to dot matrix printers?
- Loud
- Slow
- Final print quality is poor.
- Expensive to buy
What are some advantages to laser printers?
- High quality prints
- Fast
- Reliable
What do laser printers use?
Dry powdered ink called toner.
What do 3-D printers use?
Plastic filament, powdered resin, ceramic or metal powder.
What are some applications of 3-D printers in medicine?
- Manufacturing of prosthetic limbs
* Reconstructive or general surgery.
How are 3-D printers advantageous in the manufacturing of prosthetic limbs?
- Reduction in cost of manufacturing.
* Greater accuracy in matching limb to individual patient
How are 3-D printers advantageous in surgery?
- Surgeons can demo a procedure to ensure the actual surgery is more accurate
- Produce very accurate parts for surgical procedures
How are 3-D printers advantageous in manufacturing parts & art?
- Very old items are likely no longer manufacturing, using existing parts as a blueprint allows it to be possible to print new components at a fraction of the cost.
- Prototyping for design, fashion and art can save huge costs
What type of device are RFID systems?
Input and Output
How do RFID chips work?
- The powered receiver emits radio frequency energy
- Transponder antenna in the tag becomes energised by radio waves.
- Transponder can then send data to the receiver.
What are some examples of uses of RFID tags?
- Security Control points
- Shipping and supply chain tracking for goods
- Banking and fast payment systems
- As a potential replacement for barcode systems.
What are the two types of RFID tags?
- Passive
* ACtive
What are passive tags?
Passive transponders are those with no power source, and which rely on the radio waves from the receiver for their energy.
What is a disadvantages of passive tags?
Transponders need to be placed very close to the receiver.
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• Structure Of The Processor ( 1 )35
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• Structure Of The Processor ( 2 )16
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• Factors affecting performance of the CPU23
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• Factors Affecting Performance ( 2 )5
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• Architectures12
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• Types Of Processor21
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• Input17
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• Input ( 2 )15
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• Output20
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Storage Devices17
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Storage Devices ( 2 )15
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Macroeconomic equilibrium0
