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Smart library with comprehensive functions for counting (multiple) frequencies and period-times. For Arduino Uno and Zero.

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avdwebLibraries/avdweb_FreqPeriodCounter

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FreqPeriodCounter facts:

  • The frequency counter can be used in two ways: Interrupt triggered by the input signal or polled regularly in a loop.
  • The measurement can be done in milli seconds or micro seconds.
  • We can use a debounce time if the input is a mechanically switch.

http://www.avdweb.nl/arduino/libraries/frequency-period-counter.html