I am working with "Another Frequency Counter" program in Nick Gammon's excellent notes on Timers and Counters ( Gammon Forum : Electronics : Microprocessors : Timers and counters ). This is the example that works by counting the interval between rising edges. I tested on my UNO first and it worked jus…

Interrupt numbering mismatch: MEGA 2560

DKWatson September 19, 2018, 11:46am 7

Make sure you have one of these,

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