The output of the device is read by an Arduino Nano, which is hooked up to a string of WS2812B LEDs and a small OLED display. The LEDs display the bearing of magnetic north, while the OLED screen ...

It achieves this by embedding small OLED displays in each key. The split-style mechanical keyboard has an orthogonal key layout, with transparent keycaps containing 0.42-inch diagonal 72x40 OLED ...