For a perfect example of this process, check out the latest update on the 3D printed DSLR ... The new Hall effect sensor mounts are a very nice touch. Back in June, the mount [isaac879] showed ...

If so, then you might be interested in this project using Arduino. My goal with this project was to be able to dynamically know the filament status during the 3D printer operation. I developed this ...

The sensor itself is an IC situated in the middle of the board, which in Scott’s design sits on a 3D-printed carrier. A bearing mount sits atop it, which holds — you guessed it — a bearing.