Hi Bob, Jerson,

I'd been working on something similar a while back, you'll find the thread at http://www.picbasic.co.uk/forum/show...=ardhuru+phase

You might get some insight going thru' the replies I received.

Also, I'd created an Excel sheet to draw the 3 sine waves against time, to help me visualise the waveform (raw, rectified and digital, as seen by the pic input). If you're interested, I could attach that.

Regards,

Anand