Acceleration comparisons

[MaxGunz]

Originally Posted by RPS69

Agreed, aligning it could be tricky. The linear is also truth.

It also have a great advantage. You could place it at the bottom of a long stick, and still have precision, while pots moving in a very short arc are far less reliable.

Distance from the magnet is not how to get linear angle from a Hall sensor! The Hall reads only on 1 axis. You align the axis dead center over the magnet center between N and S poles. When the magnet turns, the strength of the field along the Hall axis changes. That is what you measure.
Try the other way, you will need more than 1 magnet and the fields will affect each other, merge, and you won't get good results.

To achieve that kind of precision with optics, you will need some demultiplying system.

Now... so much precision got a draw back, filtering is MANDATORY!

Optical... a lot can be done using laser-printed transparency graphics you can get printed at most any office store.

Have you ever looked at how ball mice track motion? Or used a vernier?

I have read that working with the dimensions of a Young's double-slit can yield a high number of interference bands. Perhaps diffraction from a single slit can also be used.

Really, the number of ways is a study in itself.