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GCSE DT > Systems approach to designing > Flashcards

Systems approach to designing Flashcards

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1
Q

What is a system made up of?

A

Several parts that work together as a whole to carry out a function

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2
Q

What do all electronic systems require?

A

input
process
Output

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3
Q

What does systems diagrams clearly show?

A

The input process and output stages of the system the more complex the system, the more blocks that are in the diagram

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4
Q

What does PCB stand for?

A

Printed circuit board

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5
Q

What are PCBs?

A

They are nonconductive boards that contain copper tracks that Link holes where electrical components can be inserted

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6
Q

What are PCBs designed for?

A

The design, specifically for each circuit components

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7
Q

What is surface mounting?

A

When components are attached directly onto the surface of a PCB

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8
Q

What does a PCB support and connect?

A

Electrical components

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9
Q

List four examples of switches

A

Toggles, slides, pushes and microswitches

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10
Q

What are switches which is used for?

A

The use to complete or disconnect a circuit they can be turned on (closed)to let current flow or turned off(opened) to stop the current Flo

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11
Q

What does LDR stand for

A

Light dependent resistor

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12
Q

How do LDRs work?

A

Resistance increases in the dark (limiting the current) and decreases in the light (increases current)

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13
Q

Examples of where LDRs are commonly use?

A

Street lights that come on automatically when It gets dark

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14
Q

How do you pressure sensors work?

A

Depending on the sensors, function resistance, either increases or decreases to allow more or less current to flow through

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15
Q

What do pressure sensors do?

A

They detect changes in pressure

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16
Q

Examples of where pressure sensors have been used

A

They often used in car tyres to notify drivers with a pressure drops below a certain level

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17
Q

What does IC stand for?

A

Integrated circuits

18
Q

What do integrated circuits do?

A

They can perform multiple tasks, meaning that they reduce the number of components needed in a circuit. Most processes in electronic systems are carried out by these.

19
Q

What do process devices process?

A

The electronic signals received from an input to determine an output action

20
Q

What is a microcontroller?

A

It is the type of I see that is programmed to perform specific tasks in a wide variety of electronic devices

21
Q

What do microcontrollers contain?

A

It contains memory, programmable, input/output peripherals, and the processor all on one chip. It is essentially a tiny computer.

22
Q

Microcontrollers are adaptable what does this mean?

A

That they can be programmed to perform different tasks. The program is then stored in the microcontrollers memory

23
Q

Examples of what microcontrollers are often used as

A

They are often used as time is encounters in embedded systems to measure, elapsed time or a count or time external events

24
Q

What are time is often used to do

A

To add a time delay

25
Q

How do timer create a time delay

A

By creating a pulse of voltage after a certain period of time to trigger an output

26
Q

Example of a timer

A

A microwave timer

27
Q

What do you counters do?

A

They count the number of pulses a voltage created by an input device and display it as an output

28
Q

Give an example of a counter

A

A pedometer, which counts each step, a person takes

29
Q

What is the role of a logic gate?

A

They make decisions in microcontrollers based on whether an input is on (1)or off (0)

30
Q

When are logic gates not used?

A

To take one input an output, the opposite value

31
Q

What do output devices do?

A

They transfer electrical energy into a response, depending on the devices function

32
Q

Name the three output devices

A

Buzzers , speakers and lamps

33
Q

Name the four input devices

A

Switches, LDRs, thermistors and pressure sensors

34
Q

What do buzzers do?

A

Buzzers use electrical energy to create sound energy

35
Q

How do buzzers work?

A

Most use a piezo transducer , which converts electrical current into mechanical movement to create sound

36
Q

Give an example of a buzzer

A

A car alarm

37
Q

How do you speakers work?

A

They use electrical energy to create sound energy

38
Q

Give an example of a speaker

A

Speakers on a mobile phone

39
Q

How do lamps work?

A

Lamps, convert electrical energy into light energy

40
Q

Give an example of a lamp

A

House lights

GCSE DT (6 decks)

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