Ender 3 PSU Cover

thingiverse

I have my Raspberry Pi and Arduino-Uno powered from the 12v PSU, so I designed this cover for the Ender 3 (Cheap Chinese PSU) to fit both the 24v and 12v PSU in one enclosure. I also didn't like the add-on fan silencer for the Ender 3 PSU, so this cover features an integrated fan silencer. To be honest, I don't think it's very efficient, but I do think it's good enough. (I have already modded the stock 24v PSU fan with a 330 Ohm resistor to reduce its speed and keep noise levels down. I could also find a 12v version of the same dimensions and use the new internal 12v PSU.) Why I made this cover: I have two thermocouples with Max6675 modules connected to an Arduino Uno to act as a stand-alone thermal runaway protection device. (I've had my SKR mini E3 v1.2 hang and go into thermal runaway once before, so I don't trust Marlin to protect the system if it hangs again for whatever reason.) The Raspberry Pi with Octoprint gives me remote access along with the PSU control plugin and the enclosure plugin. I have the Raspberry PI and Arduino controlling a 5v relay in the back electronics enclosure that controls a 12v relay sitting in the PSU cover, which houses the power meter. This switches the mains voltage feeding the 24V PSU for the printer. The system cuts only the 24v PSU, leaving the 12v PSU running to keep the Raspberry Pi and Arduino powered. It's the best system I could come up with using parts I already had lying around. The 12v PSU that fits can be found here: (12v 36w) (However, the PCB shows 40W. Strange, right?)