This simple device is designed to be used as an ESPHome-controlled Home Assistant integrated smart lights controller. It has an onboard LED matrix consisting of 5 colors (RGBW + night yellow) and a set of MOSFET drivers to individually control 5 lines of external LED strips (RGBWW), so it can be used with either.
It needs a single 12V DC power source that will drive both LEDs and a controller through a high-efficiency drop-down converter, although for programming purposes it can be powered from a regular USB-C cable.
It combines 3x and 4x inline LED chains to achieve relatively low losses on current-limiting resistors with both 2V and 3V voltage drop LEDs.
It can be neatly hosted in a plastic box, hiding in a ceiling light installation