The display is 3D-printed, as you would expect these days. Each segment contains a small neodymium magnet, and each coil a 1 mm iron core for flux concentration.

Posted in LED Hacks Tagged 7 segment, 7 segment LED display, addressable, led, multiplexing, neopixel, ws2811 ← Electromagnetic 7-Segment Display Easy On The Eyes AND The Ears ...