■ RAMPS1.4 + External(additional) 5V power Wiring

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※ Do not use jumper between VCC and 5V in this case.

In this case, it's safe because 5V of servo connector and VCC of RAMPS1.4 are seperated.

■ RAMPS1.4 + ATX power Wiring

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​​In this case, 12V from ATX Power is supplied to 1117 regulator on Arduino through diode D1 on RAMPS1.4.

​The 1117 series Voltage Regulator in Arduino can operate with up to 20 V input.

​​Therefore Arduino can work well without USB. (Standalone with an SD card)​

■  Creality3D CR-10S Pro Wiring

 or my 3D Printer has an inductive sensor

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■ MKS-Gen V1.3 Wiring

■ MKS-Base V1.4 Wiring