Hey,

Thanks alot Brian, that write up is quite good but I'm still not sure how to implement the formula into pbp based on my current program setup. For example, the formula has a 'v' volts variable--is that the a to d voltage reading; and if so I guess that I have to to that conversion first, then plug in the v value??
BTW, I bought a 'Brainstem' a few years ago and never used it because I found programming a litttle difficult. Can it be programmed in basic?

Thanks.
John