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The 3-pole input connector follows the Theremino standard with +5VDC on the center pole. This circuit doesn't use +5V, so use two Dupont cables for signal and ground.
For high current, short the center pin to GND on the PCB underside. This allows using only a single GND cable and relying on the Theremino Central Server for grounding other modules.
Theremino, a modular open-source system connecting computers to the real world (music, education, research), runs natively on Windows 10/11.
The Theremino Master can control the opto-MOSFET in PWM mode for dimming large loads. This opto-MOSFET is also compatible with Arduino systems without modifications.