Give a sensor two thresholds
Use hysteresis to avoid rapid switching around one threshold.
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The Builder · fictional example
The situation
A fictional fan turns on above 25 degrees and off below 25. The simulated reading alternates 24.9, 25.1, 24.9, 25.1. The fan switches repeatedly.
Before you continue
What would you predict? Say it aloud or write a line on paper. Then compare your reasoning with the example.
Starting knowledge: Read a simple if/then rule and keep track of an on/off state.
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