Updated README.txt to include information about synching PID engine to external timing sources

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Frank Paynter 2021-05-15 15:32:31 -04:00
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@ -9,3 +9,7 @@
http://brettbeauregard.com/blog/2011/04/improving-the-beginners-pid-introduction/
- For function documentation see: http://playground.arduino.cc/Code/PIDLibrary
- To synchronize PID::Compute with an external timing source such as a TIMER ISR,
call SetSampleTime() with an argument of zero. This will force Compute to generate a
new output value each time it is called.