[bhumudar]

I would be inclined to agree with Cecil. Your best option would be to use a potentiometer mounted on the pivot point of your shooter. This method will give you much more useful data, and while it won't give you an explicit angle but rather a voltage reading it is a matter of doing a simple conversion if necessary. My team used it in our last robot, and it worked wonderfully. Since we mounted it on the pivot point the vibration from the shooter barely affected the readings. We used a vex potentiometer, and if price is an issue, they aren't very expensive.