PIC 16f877 A/D conversion Allegro ACS712

[dhouston]

If I could get a reading form the ACS712 at the top/bottom of each wave then it could be done but then that is what the RMS to DC is going to do for me give me a nice straight DC line.

You are still making an unwarranted assumption that you have a sine wave. Darrell is suggesting the RMS chip and I suggested looking at the output of the Allegro chip with an oscilloscope (to see the waveform) because we don't think you have a sine wave. 0.707 x the peak will work with a sine wave and averaging ALL of the readings will work with any waveform (if the readings can be taken fast enough to get a good sampling of the wave form).

There are at least three ways to do this with non-sinusoidal waveforms. See the web page I referenced earlier (via email)...

• http://www.pge.com/includes/docs/pdf...idal_power.pdf

I vaguely recalled a somewhat similar thread - it took me a while to find it.

• http://www.picbasic.co.uk/forum/show...=motor+current