[nyaculak]

Originally Posted by BradAMiller

You can also look at using an accelerometer that measures acceleration due to gravity. So it measures 1G when straight up in the axis it's measuring and changes by the cosine of the angle as it rotates. Since it's an absolute measurement, there's no drift.

We actually tried to use this method last year before we settled on the use of the potentiometer. Unfortunately, the oscillations of our shooter greatly lowered the precision of our measurements by introducing new sources of acceleration.