The code suggested by johnwasser in the post Square wave generator and frequency meter - #3 by johnwasser works well only for low frequencies. I would like to have something like that to capture frequencies & duty cicle from 1Hz to 1MHz. Any suggestion ? Thanks

Hi Frequency & ratio capture

jremington September 18, 2021, 2:03pm 2

What Arduino are you using, and at what inpuy frequency does the code fail?

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