The myCNC-ET7R4 (also called the myCNC-ET9) controller is the updated version of the myCNC-ET7 board with some additional functionality. For information on the ET7, please consult the following manual: myCNC-ET7 CNC controller
The board naming is different due to a different chip, which requires a separate version of the firmware from the regular ET7 boards (such as ET7R3).
The ET7R4 controller is pictured below:
The myCNC-ET9 pictured with a DC motor driver:
myCNC-ET9 main features: