October 21, 2023
Description
This is designed for a CPO Physics stand that has mounting holes 5 cm apart. The bolts that attach it to the base stand are 1/4 in.-20 nuts. The electromagnet is wound around a carriage bolt with a 1/4 inch-20 acorn nut. The acorn nut is good for centering the marble.
The circuit is simple — it is a an electromagnet, AA battery case, switch, and optional a flyback diode.
License:
Creative Commons - Attribution - Non-Commercial - Share Alike
mattosx1984
