1.4.1
Inputs
Inputs: Sensors
Inputs: Sensors
Inputs are things that are put in to the system. They can be activated mechanically (e.g. a switch), or sense a change (e.g. sensor).
![Illustrative background for Systems](https://image-v2.cdn.app.senecalearning.com/2018-09/e3db2cf8-61a4-43d4-804a-45efd9569613/flow-diagram,h_400,q_80,w_640.jpg)
![Illustrative background for Systems ?? "content](https://image-v2.cdn.app.senecalearning.com/2018-09/e3db2cf8-61a4-43d4-804a-45efd9569613/flow-diagram,h_400,q_80,w_640.jpg)
Systems
Systems
- Electronic systems are broken down into stages.
- The main stages are the inputs, processes and outputs.
- Systems diagrams tend to be drawn as flow charts.
![Illustrative background for Light sensors](https://image-v2.cdn.app.senecalearning.com/courseImages/physics/1.5.1 Energy Changes/light-bulbs-min,h_400,q_80,w_640.jpg)
![Illustrative background for Light sensors ?? "content](https://image-v2.cdn.app.senecalearning.com/courseImages/physics/1.5.1 Energy Changes/light-bulbs-min,h_400,q_80,w_640.jpg)
Light sensors
Light sensors
- Component name: Light dependent resistor (LDR).
- A light sensor that is sensitive to a change in light.
- Its resistance increases in the dark so can act as a switch turning on street lights in the dark and off in the light.
![Illustrative background for Temperature sensor](https://image-v2.cdn.app.senecalearning.com/2018-08/f418a04f-b5ac-4b1d-9300-6a96ee1157af/thermometer-3579034_1920,h_400,q_80,w_640.jpg)
![Illustrative background for Temperature sensor ?? "content](https://image-v2.cdn.app.senecalearning.com/2018-08/f418a04f-b5ac-4b1d-9300-6a96ee1157af/thermometer-3579034_1920,h_400,q_80,w_640.jpg)
Temperature sensor
Temperature sensor
- Component name: Thermistor.
- A temperature sensor that is sensitive to a change in temperature.
- Its resistance increases with a change in temperature so can act as a switch turning the oven on when it is too cold and off when it has reached the desired temperature.
Inputs: Switches
Inputs: Switches
Inputs are things that are put in to the system. They can be activated mechanically (e.g. a switch), or sense a change (e.g. sensor).
![Illustrative background for Switches](https://image-v2.cdn.app.senecalearning.com/courseImages/biology/OCR Gateway/5.1.5/switch on and off,h_400,q_80,w_640.jpg)
![Illustrative background for Switches ?? "content](https://image-v2.cdn.app.senecalearning.com/courseImages/biology/OCR Gateway/5.1.5/switch on and off,h_400,q_80,w_640.jpg)
Switches
Switches
- Mechanical switches are added to systems, allowing them to be turned on and off.
![Illustrative background for Pressure switch](https://image-v2.cdn.app.senecalearning.com/2019-03/f08678d1-3aa2-4196-b8e0-9bcb378c7f4f/seat-belt-car-safety-,h_400,q_80,w_640.jpeg)
![Illustrative background for Pressure switch ?? "content](https://image-v2.cdn.app.senecalearning.com/2019-03/f08678d1-3aa2-4196-b8e0-9bcb378c7f4f/seat-belt-car-safety-,h_400,q_80,w_640.jpeg)
Pressure switch
Pressure switch
- Component name: Pressure switch.
- A pressure switch is sensitive to a pressure or weight being applied.
- It can be used in cars to remind the driver to fasten their seat belt.
![Illustrative background for Toggle switch](https://image-v2.cdn.app.senecalearning.com/courseImages/physics/4.3.5 - Digital Circuits/light-switch - Edited-min,h_400,q_80,w_640.jpg)
![Illustrative background for Toggle switch ?? "content](https://image-v2.cdn.app.senecalearning.com/courseImages/physics/4.3.5 - Digital Circuits/light-switch - Edited-min,h_400,q_80,w_640.jpg)
Toggle switch
Toggle switch
- Component name: Toggle switch.
- Once switched on a toggle switch will complete the circuit and it will remain on until it is turned off and the circuit is broken.
- It is used for light switches.
![Illustrative background for Push to make (PTM) switch](https://image-v2.cdn.app.senecalearning.com/2018-10/f6cc1822-bc2b-40c1-b25a-81411c77a3f5/doorbell-door-,h_400,q_80,w_640.jpg)
![Illustrative background for Push to make (PTM) switch ?? "content](https://image-v2.cdn.app.senecalearning.com/2018-10/f6cc1822-bc2b-40c1-b25a-81411c77a3f5/doorbell-door-,h_400,q_80,w_640.jpg)
Push to make (PTM) switch
Push to make (PTM) switch
- Component name: Push to make (PTM) switch.
- This circuit is usually off and when you push the switch the circuit is completed and turned on.
- A good example of this is the door bell, whereby it rings when pushed.
![Illustrative background for Push to break (PTB) switch](https://image-v2.cdn.app.senecalearning.com/2019-03/9830b368-cc93-4537-b761-00490502103d/elevator-lift-buttons-control-,h_400,q_80,w_640.jpg)
![Illustrative background for Push to break (PTB) switch ?? "content](https://image-v2.cdn.app.senecalearning.com/2019-03/9830b368-cc93-4537-b761-00490502103d/elevator-lift-buttons-control-,h_400,q_80,w_640.jpg)
Push to break (PTB) switch
Push to break (PTB) switch
- Component name: Push to break (PTB) switch.
- This circuit is usually on and when you push the switch the circuit is broken and turned off.
- This can be used in a lift when the user wants the door to be kept open for longer by pressing a button.
1Core Technical Principles
1.1New & Emerging Technologies
1.2Energy Generation & Storage
1.3Developments in New Materials
1.4Systems Approach to Designing
1.5Mechanical Devices
1.6Materials Categories
2Paper & Board: Specialist Technical Principles
2.1Selection of Materials
2.2Paper & Board: Forces & Stresses
2.3Paper & Board: Ecological & Social Footprint
2.4Paper & Board: Sources & Origins
2.5Paper & Board: Using Materials
2.6Paper & Board: Stock Forms, Types & Sizes
2.7Paper & Board: Scales of Production
2.8Paper & Board: Specialist Techniques & Processes
2.9Paper & Board: Surface Treatments & Finishes
3Timber: Specialist Technical Principles
3.1Timber: Selection of Materials
3.2Timber: Forces & Stresses
3.3Timber: Ecological & Social Footprint
3.4Timber: Sources & Origins
3.5Timber: Using Materials
3.6Timber: Stock Forms, Types & Sizes
3.7Timber: Scales of Production
3.8Timber: Specialist Techniques & Processes
3.9Timber: Surface Treatments & Finishes
4Metal: Specialist Technical Principles
4.1Metals: Selection of Materials
4.2Metals: Forces & Stresses
4.3Metals: Ecological & Social Footprint
4.4Metals: Sources & Origins
4.5Metals: Alloy-Based Materials
4.6Metals: Using Materials
4.7Metals: Scales of Production
4.8Metals: Specialist Techniques & Processes
4.9Metals: Quality Control
4.10Metals: Surface Treatments & Finishes
5Polymers: Specialist Technical Principles
5.1Polymers
5.2Polymer Categories
5.3Polymer Forms
5.4Polymer Production, Techniques & Quality Control
6Textiles: Specialist Technical Principles
6.1Textile Materials
6.2Selection of Materials
6.3Forces & Stresses
7Designing & Making Principles
7.1Investigation & Data
7.2Environmental, Social & Economic Challenges
7.3The Work of Others
7.4Design Strategies
7.5Communication of Design Ideas
7.6Prototype Development
7.7Selection of Materials
7.8Tolerances
7.9Material Management
7.10Specialist Equipment
7.11Specialist Techniques & Processes
Jump to other topics
1Core Technical Principles
1.1New & Emerging Technologies
1.2Energy Generation & Storage
1.3Developments in New Materials
1.4Systems Approach to Designing
1.5Mechanical Devices
1.6Materials Categories
2Paper & Board: Specialist Technical Principles
2.1Selection of Materials
2.2Paper & Board: Forces & Stresses
2.3Paper & Board: Ecological & Social Footprint
2.4Paper & Board: Sources & Origins
2.5Paper & Board: Using Materials
2.6Paper & Board: Stock Forms, Types & Sizes
2.7Paper & Board: Scales of Production
2.8Paper & Board: Specialist Techniques & Processes
2.9Paper & Board: Surface Treatments & Finishes
3Timber: Specialist Technical Principles
3.1Timber: Selection of Materials
3.2Timber: Forces & Stresses
3.3Timber: Ecological & Social Footprint
3.4Timber: Sources & Origins
3.5Timber: Using Materials
3.6Timber: Stock Forms, Types & Sizes
3.7Timber: Scales of Production
3.8Timber: Specialist Techniques & Processes
3.9Timber: Surface Treatments & Finishes
4Metal: Specialist Technical Principles
4.1Metals: Selection of Materials
4.2Metals: Forces & Stresses
4.3Metals: Ecological & Social Footprint
4.4Metals: Sources & Origins
4.5Metals: Alloy-Based Materials
4.6Metals: Using Materials
4.7Metals: Scales of Production
4.8Metals: Specialist Techniques & Processes
4.9Metals: Quality Control
4.10Metals: Surface Treatments & Finishes
5Polymers: Specialist Technical Principles
5.1Polymers
5.2Polymer Categories
5.3Polymer Forms
5.4Polymer Production, Techniques & Quality Control
6Textiles: Specialist Technical Principles
6.1Textile Materials
6.2Selection of Materials
6.3Forces & Stresses
7Designing & Making Principles
7.1Investigation & Data
7.2Environmental, Social & Economic Challenges
7.3The Work of Others
7.4Design Strategies
7.5Communication of Design Ideas
7.6Prototype Development
7.7Selection of Materials
7.8Tolerances
7.9Material Management
7.10Specialist Equipment
7.11Specialist Techniques & Processes
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