Full checkout process up to 1amp - maybe not as efficient as a full bridge rectifier; could use larger spacing C7 is a guessed value; could be other values, ceramic may work, test debouncing. Maybe enlarge footprint if needed. - Resistor footprint could stand to be tuned further. Licence You can even use a modified version of NL4MD-V with 8 vertical PCB mount, https://www.neutrik.com/en/product/nl4md-h speakON Chassis Connectors, 4 pole male XLR receptacle, switching contacts, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, retention spring, https://www.neutrik.com/en/product/ncj5fi-v Combo A series, 3 pole male XLR receptacle, grounding: without ground/shell contact, horizontal PCB mount, https://www.neutrik.com/en/product/nc3faav A Series, 5 pole female XLR receptacle, grounding: mating connector shell and front panel, horizontal PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc3mbv-b B Series, 3 pole male XLR receptacle, grounding: separate ground contact to mating connector shell.