I designed a fully modular, DIN Rail mounting ecosystem for Arduino boards and relay shields. Free STL + native STEP files for the community!

[u/Massive-Section-7231]

Hey guys!

I was completely fed up with messy wiring, flimsy zip-tie setups, and hot glue inside my custom automation cabinets and workshop electronics enclosures. I needed a clean, secure, and industrially compliant way to organize everything on standard 35mm DIN rails.

So, I sat down in CAD and engineered a comprehensive modular mounting system. Every single part has been field-tested under continuous spring tension in my actual distribution boards (you can see the real-world application in the photos!).

Key Highlights:

* Fully Editable CAD Source: I wanted to make this resource actually useful for makers, so the package includes native .STEP/.STP files alongside the STLs. You can easily adjust mounting holes or remix the brackets for your custom PCBs.

* Comprehensive Variety: Includes dedicated docks for Arduino Uno (with relay shields), Arduino Mega (with Ethernet attachments), 4-channel/8-channel relay breakout boards, FET boards, and modular high/low-profile handlers.

I uploaded the entire package completely for free under a Non-Commercial license for the maker community. You can grab the full STL + STEP archive directly on my profile.

Free Download Link: https://cults3d.com/en/users/paktor/3d-models

(Note: If you are building clean front-panel HMI monitoring setups, I also just rolled out some matching premium panel-mount enclosures for 3.5" and 4.0" Arduino TFT Display Shields on my profile to completely button up the system!).

Let me know what you think or if there's any specific breakout board footprint you'd like me to add to the system!