Raspberry Pi relay server with 2020 profile attachment points (e.g. for OctoPrint, home automation, etc.)

thingiverse

In crafting a casing for my brand-new Prusa i3 style 2040 aluminum extrusion printer (similar to or heavily inspired by an AM8), I required creating a compact housing for both the Raspberry Pi and the 4-channel relay I utilize. The relay is controlled by several shell scripts to schedule specific GPIO ports of the Raspberry Pi from within OctoPrint, enabling me to switch on/off the (older computer) power supply, schedule LED lighting, and extruder cooler fan operation. The relay I obtained did not fit into [this 4-Channel Relay Module Case](https://www.thingiverse.com/thing:957292), so I needed to modify this design extensively (essentially starting from scratch). The Raspberry Pi casing is based on [this casing](https://www.thingiverse.com/thing:922740), but it also required some modification. The result is a very compact Raspberry Pi relay server casing, from which it's still possible to tinker by exposing more ports and changing wires; I did not want to seal everything in completely. The relay parts and the bottom of the Pi casing are fastened with M3 Allen key screws and knurled brass inserts of M3 x 3 x 4 mm. The top of the Pi housing screws directly into the bottom part pillars. There is one photo showing the knurled inserts of the bottom Pi casing. I've added multiple parts with different logos and attachment flanges, the naming of the parts should be enough to figure out which parts you need. Drill out the holes for the relay bottom part; the holes are blind to assist in printing without using support.