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21 Cards in this Set
- Front
- Back
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Embedded system consists of... |
1) Microprocessor 2) Sensors 3) Actuators |
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Universal computing device is a... |
computer capable of computing anything (universal Turing machine which implements all other Turing machines) |
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Layers of problem solving |
1) Problem 2) Algorithm 3) Program 4) Instruction set |
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Electrical circuits are... |
1) A closed loop 2) Contain a source 3) Contain a load 4) Source provides, load resists |
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Voltage |
the relative level of electricity between two points in the circuit (measured in Volts) |
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Current |
The amount of electrical energy passing through any point in the circuit (measured in Amps) |
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Ohm's law |
Voltage = Current x Resistance |
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Calculate power (Watts) |
W = IV |
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Flow of electricity |
Always favours the path of least resistance to the ground |
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What is a short circuit? |
A circuit with no load |
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What is a switch? |
A switch is a break in the circuit (closing the switch allows current to flow again) |
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What is a diode? |
A diode allows current to flow in one direction and stops it in the other. |
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What does polarized mean? |
Polarized elements (e.g. diodes) must be connected in the proper direction as they only allow current to flow one way. |
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What is an LED? |
LED stands for light-emitting diode |
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What are the steps of iterative design? |
1) Ideate
2) Prototype 3) Build 4) Analyze |
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What is a trade-off? |
Something you sacrifice for something else, e.g. image compression - sacrificing quality for transfer speed |
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What is feedback? |
If an object is perturbed from its original location and it returns to that location, the feedback is negative. If an object is perturbed from its original location and it continues to move away from its original location, the feedback is positive. |
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What is a real-world constraint? |
A real world constraint is a constraint that must be considered in the design of the technological system, e.g. for the physical sorting of marbles using sensors, gravity and space are real-world constraints |
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What is a potentiometer? |
A variable resistor |
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What is a Turing machine? |
A Turing machine is a mathematical model of a machine that can perform any computation. |
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What is transduction? |
Transduction is the conversion of one type of energy to another (e.g. physical energy to electrical energy, a force sensor)
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