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by woodmna69
Fri Sep 04, 2020 7:51 am
Forum: ESP32 Arduino
Topic: ESP32 Can't make an accurate Frequency Counter ???
Replies: 13
Views: 17137

Re: ESP32 Can't make an accurate Frequency Counter ???

I'm glad I found this. I have the exact same problem right now! I'm using a Vishay H11AA1 to detect zero crosses on 60hz AC. This works perfectly on an 328p Arduino at 3.3v, but moving it over to the ESP32, it does not. I'm not including code because the test code is super dumb simple. Attach interr...