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Computer control systems are used to allow you to control external devices to run several output functions.
A computer control system is made up of an input, process, and output.

A computer control system

Computer control system - Input: Switch Keyboard Sensor; Process: Flow of electrons Microprocessor; Output: Buzzer Bulb Motor

As with all systems there are both advantages and disadvantages.

Advantages of Computer Control:

  • Respond quicker than humans.
  • Easily replaced.
  • The computer does the work.

Disadvantages of Computer Control:

  • Initial set up costs are high for the computers.
  • Computers are replacing humans 鈥 job losses.

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Flow charts

Computer control programmes are written using a series of symbols that are set up in the format of a flow chart. Flowcharts are diagrams of connected shapes, combined to represent instructions to a workflow or process. Different shapes in a flowchart represent different types of operation, and these shapes have the same meaning worldwide.

Flowchart symbols

Flowchart symbols. Oval represents start/end, parallelogram input/output, diamond, decisions, rectangle is processes and arrow is a connector showing relationships between shapes.
Simple flowchart
START - BUZZER ON - WAIT 6 SECONDS- BUZZER OFF - STOP
Flowchart with a decision
START-RED/GREEN BULB ON-WAIT 5 SECONDS-RED/GREEN BULB OFF-IS THE SWITCH PRESSED? YES - STOP NO-RETURN
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Test yourself

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More on Control systems

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