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I can find a servo pin on my board.
■ RAMPS1.4 Wiring
Servo signal(orange wire) : D11 (SERVO0), Zmin (white wire) : D18 (Zmin endstop)
■ RAMPS1.4 + External(additional) 5V power Wiring
※ 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
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
■ MKS-Gen V1.3 Wiring
■ MKS-Base V1.4 Wiring
■ MKS-Base V1.5 Wiring
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