Definitions Flashcards
Analogue signals
Signals that vary continuously in amplitude, frequency or both
Digital signals
Series of pulses with two states, on or off
Uses of analogue signals
Telephones
Uses of digital signals
Wireless communication media
Inputs
Collect data and send it to a computer (e.g switch)
Processors
Receive signals, process the info and tells the output what to do (e.g arduino)
Outputs
Receive signal and present the info to the real world (e.g LED)
Advantages of microprocessors
Some of circuit can be reduced
Can be re-programmed multiple times
Disadvantages of microprocessors
More expensive that other interested ciruits
Resistors
Resistors are used to control the flow of electricity around a circuit (measured in ohms)
Standard component
An individual part that is mass produced in thousands and millions to a common specification (size, material, waist etc)
E.g nut and bolt
Surface finishes
Added to a product to improve its functionality or it’s aesthetic
Surface finished are applied to … and applied by …
To stop corrosion
and applied by adhesives, spraying or printing
Force
A force is a push or pull motion that causes a change in speed, shape or direction
Shear
Force that pushes one part of an object one way and the other part of an object another way (e.g scissors)
Bending
Force acting at an angle to the object
Effort
The amount of force applied
Fulcrum
Where a lever pivots
Load
How much weight is being removed
Gears
Gears can change the direction or speed of movement
Pulleys
Can change the direction of force to make pulling down easier than lifting up (used in cranes
Anthropometrics
Taking measurements of the human body to provide data for designers
Ergonomics
The use of anthropometric data to design products for humans
Quality control
Checks done during the making of a product to ensure that it is being made to the right quality
6 R’s : Repair
Are products designed for repair and can they be fixed
6 R’s : Reuse
Can the product be used multiple times
6 R’s: Recycle
Can the product once no longer usable be dissembled easily for recycling
6 R’s: Re-think
Can the product be made with different materials. Can it be smaller
6 R’s: Reduce
Are there product that last longer to reduce the amount of production
6 R’s: Refuse
Think twice before buying a product with poor packaging etc
Renewable
Can be re-used and is an infinite source
Non-Renewable
Finite source and cannot be replaced
Cotton is used for:
Linen is used for:
Wool:
Silk
Clothes
Bed sheets
Blankets
Ties
Polyester is used for:
Nylon is used for:
Acrylic:
Viscose:
Clothing
Tents
Ski Jackets
Sportswear
