Ender 3 Electronics case - Relay Mod

thingiverse

Found the excellent Ender 3 Electronics case by vfrman, and decided to use it for my setup. However, on the right hand side, his model has bosses for 2 buck converters (for the SKR variant) or bosses for a 12v relay (for the Melzi/SKR Mini E3 variant). I have several 5v relays that I want to utilize, and could sacrifice one of the buck converters to do so (or modify the bosses for the 12v relay), so I remixed his design to swap out the bosses. Edit: I also added a slightly modified version of the left box to increase the height of the screw stands for the YYG-2 main relay. This allows for the use of a USB cable to power the Raspberry Pi, and all of the power protection circuitry that goes with it. The USB cable plugs into the Pi and then goes underneath the relay, where it can make the turns necessary to connect to the 5v buck converter. Edit: I changed the right lid to use the opposite connector for the chain boss. This allows it to fit as expected. This part was not modeled in Solidworks, but instead cobbled together in TinkerCAD. It is rough, but it works. I have included the stl for just the chain connection part as well, just in case you need it for some reason.