This is a simple LED driver board for 4x 5V neopixel-style LED strips, with level shifters to allow for 3.3V logic.
All of this could probably be soldered-together by hand using an off-the-shelf level shifter PCB and some wires, but I wanted the convenience of having everything mounted to a single board.
The design also offers a shared fuse for all the LED outputs, which is a nice added benefit. However, the fuse holder can be skipped and replaced by a short wire if so desired.
The ./tradrack-mount folder contains a simple model to mount the board to an Annex Engineering TradRack, or on
the underside of any 2020 aluminium extrusion, really. I recommend setting Perimeters & Shell > Advanced >
No perimeters on bridge areas > Fill the voids with bridges in SuperSlicer to make the mounting screw holes turn out
OK; I couldn't be bothered to model a more fancy hole.