Parameterized Development Board Holder
by AlexEnglish, published
Derived from Arduino DUE mount by MaikaiGuy: http://www.thingiverse.com/thing:37278
This should work for many small microcontroller development boards.
These dimensions are intended to fit a SimpleCortex board, which is the board I needed to mount. It provides a solid, but easy snap-fit, while preserving access for all on-board IO connectors, etc.
A number of features can be turned on and off, including tapered screw holes in the bottom, a finger hole in the bottom (useful for helping to push the board out if you want to remove it), and outside tabs to screw through, or tabs to sew across for mounting on fabric.
The version pictured is the one with the sew tabs, as that's what I needed at the moment.
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If using with a SimpleCortex, print and use. If using with anything else, measure your board with calipers and put its dimensions into the openscad file, render, export, and print. Turn on and off features as you like.
If you use the internal screw holes, make sure to insulate between the screws and the board with a piece of tape or other material so you don't short out your board.
Some components may have legs that stick down a little further than others. This was the case with the power connector on the SimpleCortex board. I was able to easily bend over the extended portion of those leads so they were no taller than the other through-hole leads, allowing the board to sit flat. In the case where this is not possible you'll probably want to subtract a shape from the bottom surface of the board to give it some clearance, as MaikaiGuy did in his.