Maple Mini Pin Protector

I recently published the little project [Nano Pin Protector](http://www.thingiverse.com/thing:880427) which provides a shell for the widely used Arduino Nano and its many compatibles.

Now, did you know that instead of using a Nano (which has an 16MHz 8-bit micro-controller with 32KB of flash memory and only 2KB RAM) you could just as well use a Maple Mini module based on an Arm Cortex-M3 STM32 32-bit micro-controller that runs at 72MHz and provides 128KB flash and 20KB RAM memory?

[LeafLabs](http://leaflabs.com) has developed the open source [Maple Mini](http://static.leaflabs.com/pub/leaflabs/maple-docs/latest/hardware/maple-mini.html) module, which is about the same size as the Arduino Nano and available for about the same price as the Nano. In addition to the original LeafLabs version, there are also several compatible (and cheaper) versions on the market.

Recently, and thanks to [Roger Clark](https://github.com/rogerclarkmelbourne), the Maple Mini (and other STM3