Physical model of coin acceptor

The basic principle of coin detection is to test the physical properties of the coin against known characteristics of acceptable coins. The coin acceptor analyses the coin according to its size, diameter, thickness, mass, metal composition and/or magnetism. The article discusses the possible principle of distinguishing Czech coins based on their influence on the magnetic field. In CAD SolidWorks a 3D model was created to fit a standard school coil. The model was printed by 3D printer Prusa i3 MK3S and supplemented with a magnetic field sensor from Vernier. After placing the coin into the core the changes of magnetic field magnitude are measured. There is measured the changes of magnitude of the magnetic field.