Housing for 3x buck converters for Raspi and fan supply on 3D printer

thingiverse

I've designed a custom enclosure for my Ender 3 Pro 3D printer. To power my Raspberry Pi running Octoprint and quiet Noctua fans, I need at least a 5V supply and a 12V supply. My enclosure can hold up to three LM2596 converter modules, which are affordable and commonly used. These modules can supply up to 3A of adjustable voltage. To attach the housing to my printer, I'm using printed T-nuts that fit into the mounting rails. The recommended screw size is M3x8, as seen in this Thingiverse file: https://www.thingiverse.com/thing:3050607/files You can mount the housing in any direction you prefer, but I suggest attaching it below the print bed with the open side facing down. This keeps filament out of my electronics and allows for airflow from the bottom. The module PCBs are secured with M3x6 screws on the domes. If using PETG material, I recommend driving the screws into the plastic to create a sturdy bond. A thread cutter is useful for creating nice M3 threads in the screw domes. In my prototype pictures, you can see that I initially had small mounting ears that tended to slip into the groove of the mounting rail. This issue has been resolved in the uploaded design, with the ears now covering the full height of the housing.