Hi,

I am not sure if this has been already addressed over here, I am trying to sense the phase of an AC current(3vp-p) by connecting it to one of the mu.c's pins. I have already tested the software on mu.c using an waveform generator, but i am not sure how i can convert this 2-wire AC to be fed to a single GPIO. I appreciate your help and in case this has been already addressed please vector me to the same.

Cheers,
Bob

 

Phase is a relative term. A single AC signal has no defined phase. Can you refine your question?

 

Oops thats true, my bad i wasnt clear enough. What i would like to do is find out the phase difference between an input AC sine wave and a square wave generated by the microcontroller. I would like the square wave to lead the sine wave by 90deg

 

How would an output lead the input signal? Do you mean lag by 90deg?