What is it?

PCB with holes to mount a Raspberry Pi, Arduino Uno / Mega or BeagleBone Black to a DIN rail clip in a horizontal or vertical orientation. Second picture shows a Raspberry Pi, Arduino Mega and BeagleBone Black mounted to DIN rails on our DinVesa plate which mounts to the VESA pattern on a monitor making a self contained development system. A Raspberry Pi Zero and some of our other DIN sensor boards are also on the DinVesa plate.

Why did you make it?

I can make these for a much lower cost then the metal Raspberry Pi, Arduino Uno / Mega and BeagleBone Black DIN mounts commonly available. First-Class Mail shipping keeps the cost down, but the assumption is you already have some DIN clips Phoenix Contact 1201578 or equivalent and hardware to attach the compute board you are DIN mounting.