Auto-Electrical Modules for MTA Modular Fuse Holder System
Description
3D printable designs for a suite of modular components to create auto-electrical installations. This is an ongoing project. I recommend heading over to [My GitHub project](https://github.com/smorgo/Auto-Electrical-Modules) for the latest information. __Please note__ this project has a non-commercial license attached. You are welcome to use it as you see fit (subject to the terms of the license, linked to the left) but you must not use it commercially (so, you can't sell the work, nor pieces printed from the work). Any derived works must also be licensed as non-commercial. The printable components in this project are intended to be compatible with the [MTA Modular Fuse Holder System](http://www.mta.it/en/frames-modules). The MTA Modular Fuse Holder System is available in the UK from such vendors 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. The lack of a suitable module in the MTA range led to the design of a 3D printable enclosure that fits into the MTA frames or brackets, alongside the regular fuse and relay modules. ## Printable Components The project includes OpenSCAD source code to generate the following components: * A lidded enclosure with a parameterised height * End brackets with a parameterised 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. This 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 you can 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. Use the project responsibly. ##Module Locks The standard MTA frames and brackets include a plastic locking tab to hold the modules securely in place. The same design can't be readily replicated in this 3D printed design for two reasons: (1) the tab would normally be printed in mid-air and I'm trying to avoid using supports 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. 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.
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