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 ...

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 ...

At its core, the project employs an Arduino Nano ... multiple 3D printed components, each requiring several hours to produce, including the reaction wheels and various mount plates.