YouTuber's homemade electric motor from LEGO bricks spins at 4,000 rpm

YouTuber Jamie from the channel Jamie’s Brick Jams constructed a fully functional electric motor primarily from LEGO bricks, simple magnets, and minimal electronic components, demonstrating fundamental electromagnetic principles without relying on advanced motor controllers or microchips. The motor uses two neodymium magnets mounted on a rotor and a hand-wound copper coil to generate motion when powered by a 9-volt battery. A second coil acts as a sensor, detecting the rotor’s position and triggering a transistor to send timed bursts of power to the driving coil, maintaining continuous rotation. This simple setup achieves about 1,300 rpm in its basic form. The project highlights the core physics behind electric motors: electric current through a coil creates a magnetic field that interacts with permanent magnets to produce motion. Jamie’s design uses a minimalistic circuit with just one transistor, an LED indicator, two coils, and a battery, eliminating the need for complex control boards or mechanical commutators. By adding LEGO gears and a belt drive, the motor