Keyestudio nano ch340 controller is a small, complete board based on the ATmega328. This shield can make quick work for managing stepper motors in your project. Each channel of stepper motor only needs 2 IO ports, which means 6 IO ports is sufficient to manage 3 stepper motors. It has in total 3 channel slots for A4988 stepper motor driver modules (not included) for driving 3 channel of stepper motors. It can be used as driver expansion board for engraving machines. Keyestudio CNC shield v4.0 needs to work with Keyestudio nano ch340. 6.2 Install Firmware and Grbl Controller.
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