more info here, the pintle can also be observed by minute changes in back voltage.:
In this course we will study and learn about electricity and electronics
Though the cpu power needed to process the waveforms as something other than binary signals is not trivial, and if you were to try it with standard mpguino hardware you would probably not be any more accurate, if even as accurate. The guino is at %50 cpu timing injector pulses in microseconds and displaying the computations.
Mike, can you pick a thread and just link to it from the other one as appropriate? Its a little cross-posty like I should be responding to both threads about the same thing.