But rather than using alternating currents through large inductors, [Tim] put 40 neodymium ... as much of the magnetic field into the interior as possible, with coils of copper tubing placed ...

Neodymium magnets are very strong so you'll need an adult to help you. Image caption, STEP 1 - COIL WIRE: Put the spool of wire on a pen. Place this between your knees and unspool the wire while ...

such as neodymium magnets, with abundant and environmentally friendly materials like copper. “Using copper coils instead of rare Earth materials in the motor’s rotating part is much more ...