Not all people know about that Creality 1.1.X boards have other accessible IO port, not just the commonly used Pin27. This tiny board can expose Pin29 for adding more features. You need to unsolder the factory 16V 100uF capacitor and re-solder it to the new board. The exposed V pin is 5V!It has a JST 3P connector, the same one that any Filament Runout sensor uses.Crosslink explains it very well:?
