zeus2kx:
Thanks MrMark.
I am afraid that these sensors would be sensitive enough to measure small phase shift.
But I will give it a try.
Do you have a sample code (simple) for sampling data and finding frequency?Thanks.
Z
Post #42 in the linked thread has the most recent code that I used. I was getting measurement errors under 1% at 300 Hz in testing.
The technique described in that thread is an approach to determining the fundamental frequency of a multi-harmonic signal, so the technique is perhaps more relevant than the particular sensor. It could be applied to the signal from any reasonably linear sensor.