Counter primarily intended for counting school charges.
However, it can also be used for counting any cylindrical objects up to 11 mm in diameter.
Printing parameters:
Box, plate, perforated part: Infill=25%, layer height 0.2 mm, no supports.
Other parts (numbers and slider): Infill=100%, layer height 0.2 mm, no supports.
Recommended material: PETG.
The magnets used have the shape of a cube with dimensions of 4 x 4 x 4 mm.
The author hasn't provided the model origin yet.