Auto-Electrical Modules for MTA Modular Fuse Holder System

thingiverse

Here is the rewritten text: I'm currently working on designing a suite of modular components for creating auto-electrical installations that can be easily printed using 3D printing technology. This project is ongoing, and you can find the latest information by visiting my GitHub project at [My GitHub project](https://github.com/smorgo/Auto-Electrical-Modules). Please note that this project has a non-commercial license attached, which means you're free to use it as you see fit (subject to the terms of the license linked on the left) but cannot sell the work or any pieces printed from it. Any derived works must also be licensed as non-commercial. The printable components in this project are designed to be compatible with the MTA Modular Fuse Holder System, which is available in the UK from vendors such as 12VoltPlanet and Polevolt. The project originated from a need to include some electronics in an automotive power distribution system that uses the MTA system. I was unable to find a suitable module in the MTA range, so I designed a 3D printable enclosure that fits into the MTA frames or brackets alongside regular fuse and relay modules. ## Printable Components The project includes OpenSCAD source code to generate the following components: * A lidded enclosure with a parameterized height * End brackets with a parameterized number of module ways * Module locks for the end brackets * Standoff spacer to raise genuine MTA brackets (not needed with brackets generated from this project) * An enclosure insert to hold a PCB and micro-relay, which is specific to my application but may provide a useful starting point for your own design. You can use modules generated from this project with its accompanying end brackets or use them with the original MTA brackets and frames. Conversely, you can use MTA modules with the brackets generated from this project. ## Intended Use I designed this project to complement the MTA Modular Fuse and Relay Holder System, not to replicate it and certainly not to infringe any copyright. Please use the project responsibly. ## Module Locks The standard MTA frames and brackets include a plastic locking tab to hold the modules securely in place. I couldn't readily replicate this design in 3D printed form due to two reasons: (1) the tab would normally be printed in mid-air, which I'm trying to avoid using supports for, and (2) the layer structure would be perpendicular to the plane of flex, making it weak and liable to break. I had a rethink and generated a separate locking component that clips to the end bracket. Being printed separately, it can have the layers oriented parallel to the plane of flex, making it much stronger. It can also be printed completely without the need for supports. It's not an entirely reliable locking system yet, though. Under significant pressure, the lock can disengage. A few more iterations of the design may be useful, but it's reasonably effective and could be made more robust with a well-placed dab of glue.