A basic and simple Arduino Uno and half size breadboard holder. I prefer to have the Arduino above my breadboard but many designs have it below so I threw together my own. Very simple, 10% infill and prints in about an hour. The spacers I used were made for the LCD display for my Makerfarm printer. The spacers were not created by me but can be found here http://www.thingiverse.com/thing:335589 I used M2 hardware to toss it together and 4 PVC feet on the bottom corners. I have included the FreeCAD files so that the design can be altered if necessary.