Responding to Sensor Readings

Computers can take readings from sensors automatically. This can be helpful in control systems where responses need to be triggered due to changes in environmental conditions.
Example of a Street Lamp Control System
A street lamp turns itself on an off automatically each morning and evening. This flowchart describes the three components of the control system: This flowchart describes how the control program will decide what to do with the lamp: Notice that there is no stop symbol in this flowchart. The control program would carry on forever in a repeating cycle to keep checking if the light levels had changed. This is called iteration and is usually entered into the computer using a repeat command.
Advantages of using Control Systems
Control systems like this are useful because they can: respond more quickly than humans to changes in environmental conditions; work continuously without making mistakes – they are very accurate and won’t get tired.

Made by Mr S Haughton