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GCSE     >Control Systems<     Bread Maker    

Control Systems


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Complex electronic systems can be broken down into simpler sub-systems. This makes it easier to understand, design and test the circuits.

Systems typically have ...

  1. INPUT/S - Sensing
    1. Light,
    2. Temperature
    3. Magnetic field
    4. Pressure
    5. Moisture
    6. Sound
    7. Movement or Rotation
  2. PROCESS/ES
    1. Comparator
    2. Logic gates
    3. Latch
    4. Time delay
    5. A to D Converter
    6. D to A Converter
    7. Microcontroller
  3. OUTPUT/S
    1. Lamp or LED
    2. Warning buzzer
    3. Solenoid
    4. Actuator, Motor or Servo
    5. Loudspeaker
    6. Most output transducers need a DRIVER.

Sub-systems and System Diagrams (Labelled boxes joined with arrows)

System diagrams are used to describe systems and sub-systems.

Dividing a system into sub-systems is a good idea because a whole system can be hard to understand.
Each sub-system can be quite simple.
Complex systems are only possible because different teams of designers and testers are responsible for each sub-system.
Many sub-systems can be purchased pre-built and tested.

Example: Turn on a lamp when it gets dark.

To achieve this you'd need ...

Input Process Output

A System Diagram

Circuit Diagram (Don't confuse circuit and system diagrams)

Sub System Circuit Diagram

 

 

 

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