There was a post about PIC Frequency meters here couple of weeks ago ,
https://www.qsl.net/dl4yhf/freq_counter/freq_counter.html
it looked useful , so i built one (4 digits) worked first time even at 60Mhz ish. then I see this post
https://www.eevblog.com/forum/proje...frequency-counter-tester/msg624411/#msg624411
today another
https://www.eevblog.com/forum/testgear/crystal-oscillator-frequency-counter-rom/msg626006/#msg626006
Just Interesting ....
https://www.qsl.net/dl4yhf/freq_counter/freq_counter.html
it looked useful , so i built one (4 digits) worked first time even at 60Mhz ish. then I see this post
https://www.eevblog.com/forum/proje...frequency-counter-tester/msg624411/#msg624411
today another
https://www.eevblog.com/forum/testgear/crystal-oscillator-frequency-counter-rom/msg626006/#msg626006
Just Interesting ....