The fabricated devices are shown in Fig. 4. Three different boxes
were made: acrylic box without guide rail, acrylic box with guide
rail, and Teflon box with guide rail. The boxes were machined using
computer numeric control (CNC) machining from the respective
materials. All dimensions are the same for each box, as shown
in Table 1 and the 1000-turn coil was wrapped using 42 AWG
(63.5 m diameter) wire with a resistance of 450 . The magnets
are grade N42 Neodymium magnets.