Solo

Understood. But, over the frequency range I'm looking at, the readings are the same whether fed an analog signal or square waves. That saves me having to use a Schmitt trigger on the input but I could do that if necessary.

Thanks - did it, guess it worked.

New to this forum and Teensy. The goal, using Teensy 4.0, is a frequency counter that can read frequency up to 35 MHz with an accuracy to the nearest 100 Khz. It should be reasonably responsive to frequency changes as it's reading the...