Standalone STM32F446RE-header CAN/RS485 stepper motor controller PCB with external 5V input, 3.3V logic rail, CAN protection, SWD/reset, level-shifted STEP/DIR/ENABLE outputs, and split-ready modular layout.

Professional 3-axis STM32F446 CNC/laser motion controller for grblHAL-class firmware, with 24V input power, protected 5V/3.3V rails, USB, SWD, buffered motion outputs, filtered inputs, and a 100mm x 100mm 2-layer PCB target.