How to make a diffusor for your LED Matrix

by Jan_Henrik @ instructables.com: Hi, in this Instructable I want to show you how to create your own diffusor for a LED Matrix. To do this we will use a 3D printer and OpenSCAD. In this tutorial I will use a LOL-Shield by Jimmie ( http://jimmieprodgers.com/kits/lolshield/ ) also I will explain,...