Ender 3 Pro Raspberry Pi case incl. stepdown and relais

thingiverse

Case for Ender 3 Pro mounts on the back of the Ender 3 stand, holding one Raspberry Pi 3, two step-down converters, and one relay with extra space for cables on the right. You'll need some short M3 screws to hold parts in place, screwing them into plastic works fine. Additionally, you'll require two M4 nuts and screws to secure the cover. Some M3 screws are needed to attach the case to V-Slot Rails using this item: https://www.thingiverse.com/thing:3050607. Used step-down converters are "LM2596 DC-DC" and relays used is "5V KY-019". You can find these online, searching for "KY-019" at Amazon.de brings up the product. Searching for "LM2596S" also works. The case allows you to turn on your printer with Octoprint and relay using a single button press. One step-down converter provides 24V->5V power for the Pi, while another provides 24V->12V for LEDs. The third relay switches on both the printer and LED step-down converters.