JuicyBoard Robotic Control System Crowd Supply JuicyBoard Robotic Control System is the foundation of a modular, open-source platform to build a custom 3D printer, CNC router, or any other device driven by stepper motors. JuicyBoard is not pre-populated with any drivers, switches, or other functions. The board only includes the components for common core functions (e.g., microcontroller, USB port, SD card, etc.). Add just the necessary functional modules for applications with this modular approach that gives many advantages over static board designs.