Unipolarmotor 9

The current is supplied solely by a pair of copper discs. To reduce the friction caused by the weight the magnetic spindle is lifted by a small magnet mounted above the spindle.
Running up current: 20A (with 5V)
Note: the physical electron flow ("-" to "+") is used to show the current flow
Background music by J. S. Bach: Praeludium in C major (played by my son Marius, some time ago, 12 years old at the time)