I couldn't explained very wel. Nema don't need 12V.Nema take Voltaj from outside probably because NEMA needs at least 40V. In this schematic , everything needs 5V or 3.3V I tried to increase current for get this PCB work. In breadboard I am using Arduino's usb power for Esp01 and hx711, Motors work with battery, only pins are connected pico.