A/D conversion problem on 18F4431

[ttease]

skimask,

not sure yet, I want to take the voltage measurments and see how they look with respect to orientation.

Basic question, if I give the micro a ref voltage, should it not scale the number from 0-1024?

Another item I need to investigate are the Tad and conversion clock bits, I guessed at what values to put here.

thanks
t

[skimask]

skimask,

not sure yet, I want to take the voltage measurments and see how they look with respect to orientation.

Basic question, if I give the micro a ref voltage, should it not scale the number from 0-1024?

Another item I need to investigate are the Tad and conversion clock bits, I guessed at what values to put here.

thanks
t

If Vref+ is what the accelerometer puts out at max, and Vref- is what the accelerometer puts out at minimum, then, yes, it'll scale from 0 to 1023.
If not, either you'll want to do some sort of scaling to the end result. Problem is, if you're input range is less than your output target range, you'll end up losing precision (I just did a post for another guy talking about that elsewhere).