Time Twister - LEGO Mindstorms Digital Clock - YouTube
LEGO MOC Spike Prime clock with two hands (minutes and hours only) ONE motor - a free version by mareklew | Rebrickable - Build with LEGO
Persistence of Vision (POV) Clock with 51515
Mindstorms powers Time Twister Lego clock
LEGO MOC Spike Prime analog clock with three mechanically linked hands (hours, minutes, seconds) - ONE motor by mareklew | Rebrickable - Build with LEGO