Open-source Real-time Driver MOD for the LEGO Orrery

• Open-source real-time driver for LEGO Orrery, enabling automated celestial motion. • Custom PCB mounts directly to NEMA17 stepper motor, replacing manual crank with minimal LEGO removal. • ESP32 brain and TMC2208 driver provide silent, precise motor control for smooth operation. • Knob allows forward/backward time navigation; button resets to current local time instantly. • Idle mode syncs motor to real time, completing a full rotation every 2.7 minutes. • Project details and build instructions available on Görkem Bozkurt’s blog. • Only five LEGO pieces removed, preserving the set’s integrity while adding automation.

Sources:

• https://blog.adafruit.com/2026/02/18/open-source-real-time-driver-mod-for-the-lego-orrery/