[Jeroen] built his spin coater out of a brushless DC ... motor controller, and an ESP32. A rotary pushbutton and an OLED form the user interface, allowing the user to select the speed and spin ...

En route to getting the off-the-peg DC-51 motor speed controller to better suit my small milling ... proportional to motor current referenced to 240Vdc for the control circuit. The current limit ...