Filament Spool Scale and Usage Meter

Update: Universal spool holder for filament rolls up to 80mm wide. https://www.thingiverse.com/thing:2486863

The filament scale and usage meter is based on Arduino UNO and load cell with HX711. The scale and spool roller combination is able to provide continuous measurement of the weight of the filament spool, thus calculate the estimated length and the filament based on the density of the filament. It can also mark the start weight then track the actual change of spool weight before and duri