1.4.1

Inputs

Test yourself on Inputs

Test your knowledge with free interactive questions on Seneca — used by over 10 million students.

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).

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.
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.
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 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).

Switches

Switches

  • Mechanical switches are added to systems, allowing them to be turned on and off.
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.
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.
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.
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.
Jump to other topics
1

Core Technical Principles

1.1

New & Emerging Technologies

1.1.1Industry1.1.2Enterprise1.1.3Sustainability1.1.4People1.1.5Culture & Society1.1.6Environment1.1.7Production Techniques & Systems1.1.8Emerging Technologies & Design1.1.9End of Topic Test - New & Emerging Technologies1.1.10Exam-Style Questions - Emerging Technologies
1.2

Energy Generation & Storage

1.2.1Fossil Fuels & Nuclear1.2.2Renewable Energy1.2.3Energy Storage Systems
1.3

Developments in New Materials

1.3.1Modern Materials1.3.2Smart Materials1.3.3Exam-Style Questions - Smart Materials1.3.4Composite Materials1.3.5Technical Textiles
1.4

Systems Approach to Designing

1.4.1Inputs1.4.2Processes1.4.3Outputs1.4.4Looped Systems
1.5

Mechanical Devices

1.5.1Types of Movement1.5.2Levers1.5.3Linkages1.5.4Rotary Systems1.5.5End of Topic Test - Designing & Mechanical Devices
1.6

Materials Categories

1.6.1Timbers1.6.2Metals & Alloys1.6.3Metals & Alloys 21.6.4Polymers1.6.5Polymer Types1.6.6Textiles1.6.7Textile Types: Fibres1.6.8Textile Types: Weave1.6.9Paper & Boards
1.7

Material Properties

1.7.1Physical & Working Properties1.7.2End of Topic Test - Materials1.7.3Exam-Style Questions - Materials
2

Paper & Board: Specialist Technical Principles

2.1

Selection of Materials

2.1.1Paper & Boards2.1.2Working with Paper & Boards
2.2

Paper & Board: Forces & Stresses

2.2.1Paper & Board: Forces & Stresses2.2.2Cardboard & Paper
2.3

Paper & Board: Ecological & Social Footprint

2.3.1Paper & Board: Ecological & Social Footprint2.3.2Paper & Board: The Six Rs2.3.3Social Issues
2.4

Paper & Board: Sources & Origins

2.4.1Paper & Board2.4.2End of Topic Test - Paper & Board
2.5

Paper & Board: Using Materials

2.5.1Paper & Board: Properties of Materials2.5.2Paper & Board: Modification of Materials2.5.3Paper & Board: Shape & Form
2.6

Paper & Board: Stock Forms, Types & Sizes

2.6.1Paper & Board: Forms2.6.2Paper & Board: Types2.6.3Paper & Board: Sizes2.6.4Paper & Board: Standards Components
2.7

Paper & Board: Scales of Production

2.7.1Paper & Board: Scales of Production2.7.2Exam-Style Questions - Scales of Production
2.8

Paper & Board: Specialist Techniques & Processes

2.8.1Paper & Board: Techniques & Processes2.8.2Paper & Board: Quality Control
2.9

Paper & Board: Surface Treatments & Finishes

2.9.1Paper & Board: Surface Treatments & Finishes2.9.2End of Topic Test - Specialist Techniques
3

Timber: Specialist Technical Principles

3.1

Timber: Selection of Materials

3.1.1Timber Based Materials3.1.2Timber: Environment & Ethics
3.2

Timber: Forces & Stresses

3.2.1Timber: Forces & Stresses3.2.2Timber
3.3

Timber: Ecological & Social Footprint

3.3.1Timber: Ecological & Social Footprint3.3.2Timber: The Six Rs3.3.3Timber: Social Issues3.3.4Exam-Style Questions - Timber
3.4

Timber: Sources & Origins

3.4.1Timber3.4.2Timber: Processing & Seasoning3.4.3Manufactured Board3.4.4End of Topic Test - Timber
3.5

Timber: Using Materials

3.5.1Timber: Properties of Materials3.5.2Timber: Modification of Materials3.5.3Timber: Shape & Form3.5.4Timber: Shape & Form 2
3.6

Timber: Stock Forms, Types & Sizes

3.6.1Timber: Stock Forms, Types & Sizes
3.7

Timber: Scales of Production

3.7.1Timber: Scales of Production
3.8

Timber: Specialist Techniques & Processes

3.8.1Timber: Tools, Equipment & Processes3.8.2Timber: Tools, Equipment & Processes 23.8.3Timber: Quality Control
3.9

Timber: Surface Treatments & Finishes

3.9.1Timber: Surface Treatments3.9.2Timber: Finishes3.9.3End of Topic Test - Specialist Techniques
4

Metal: Specialist Technical Principles

4.1

Metals: Selection of Materials

4.1.1Metal-Based Materials4.1.2Ferrous Metals4.1.3Non-Ferrous Metals4.1.4Alloys4.1.5Metals: Environment & Ethics
4.2

Metals: Forces & Stresses

4.2.1Metals: Forces & Stresses
4.3

Metals: Ecological & Social Footprint

4.3.1Metals: Ecological Footprint4.3.2Metals: Social Footprint4.3.3Metals: The Six R's4.3.4Metals: Social Issues
4.4

Metals: Sources & Origins

4.4.1Origins of Metal4.4.2Processing Metals
4.5

Metals: Alloy-Based Materials

4.5.1Types of Metal Alloys4.5.2Alloying Elements4.5.3Properties & Benefits4.5.4Processing & Fabrication4.5.5Applications of Alloys4.5.6Metal Alloys in Industry4.5.7Applications of Metal Alloys
4.6

Metals: Using Materials

4.6.1Properties of Metals4.6.2Modification of Metals4.6.3Metals: Shape & Form
4.7

Metals: Scales of Production

4.7.1Metals: Scales of Production
4.8

Metals: Specialist Techniques & Processes

4.8.1Metals: Tools4.8.2Metals: Tools & Equipment4.8.3Metals: Cutting, Forming & Machining Processes4.8.4Metals: Joining, Casting & Heat Treatment Process
4.9

Metals: Quality Control

4.9.1Metals: Quality Control4.9.2Metals: Quality Control Processes
4.10

Metals: Surface Treatments & Finishes

4.10.1Metals: Surface Treatments4.10.2Metals: Surface Treatments for Metals4.10.3Metals: Finishes4.10.4Metals: Finishing Techniques for Metals
5

Polymers: Specialist Technical Principles

5.1

Polymers

5.1.1Polymers: Functionality & Aesthetics5.1.2Polymers: Environment & Ethics5.1.3Polymers: Sources, Origins & Properties5.1.4Polymers: Forces & Stresses5.1.5Polymers: Ecological & Social Footprint5.1.6Polymers: The Six R's
5.2

Polymer Categories

5.2.1Categories of Polymers5.2.2Thermoforming Polymers5.2.3Thermosetting Polymers
5.3

Polymer Forms

5.3.1Polymers: Stock Forms5.3.2Polymers: Shape & Form
5.4

Polymer Production, Techniques & Quality Control

5.4.1Polymers: Scales of Production5.4.2Polymers: Specialist Techniques & Processes5.4.3Polymers: Quality Control Systems: Tolerance5.4.4Polymers: Finishes
6

Textiles: Specialist Technical Principles

6.1

Textile Materials

6.1.1Origin of Textiles6.1.2Textile Industry
6.2

Selection of Materials

6.2.1Natural Fibres6.2.2Synthetic Fibres6.2.3Environmental Concerns6.2.4Environmental Impact6.2.5Ethical Challenges
6.3

Forces & Stresses

6.3.1Forces & Stresses
6.4

Ecological & Social Footprint

6.4.1Ecological Footprint6.4.2Social Footprint6.4.3Addressing Ecological & Social Footprints6.4.4The Six R's6.4.5Labour Conditions6.4.6Social Issues6.4.7Addressing Social Issues
7

Designing & Making Principles

7.1

Investigation & Data

7.1.1Iterative Design7.1.2Primary & Secondary Data7.1.3Market Research7.1.4Ergonomics7.1.5Specifications7.1.6End of Topic Test - Investigation & Data7.1.7Exam-Style Questions - Specifications
7.2

Environmental, Social & Economic Challenges

7.2.1Challenges7.2.2Your Research
7.3

The Work of Others

7.3.1Designers7.3.2Architects7.3.3Product Design7.3.4Industrial Designers7.3.5Product Design Companies7.3.6Textile Design Companies7.3.7End of Topic Test - The Work of Others
7.4

Design Strategies

7.4.1Design Strategies
7.5

Communication of Design Ideas

7.5.1Design Communication
7.6

Prototype Development

7.6.1Prototype Development
7.7

Selection of Materials

7.7.1Materials
7.8

Tolerances

7.8.1Tolerances
7.9

Material Management

7.9.1Managing Material7.9.2Tools
7.10

Specialist Equipment

7.10.1Health & Safety
7.11

Specialist Techniques & Processes

7.11.1Specialist Techniques & Processes7.11.2Surface Finishes7.11.3End of Topic Test - Designing & Making

Practice questions on Inputs

Can you answer these? Test yourself with free interactive practice on Seneca — used by over 10 million students.

  1. 1
    Which of the following appliances is likely to have a thermistor?Multiple choice
  2. 2
    What does LDR stand for in relation to inputs?Fill in the list
  3. 3
    What type of switch is used for light switches?Multiple choice
Answer all questions on Inputs

Unlock your full potential with Seneca Premium

  • Unlimited access to 10,000+ open-ended exam questions

  • Mini-mock exams based on your study history

  • Unlock 800+ premium courses & e-books

Get started with Seneca Premium

Technical Textiles

Processes