Some updates to README files.

Author: dilawar

CAD/README.md

@@ -1,5 +1,11 @@
-This folder contains various CAD designs. You'd need kicad version 5 or higher
-and freecad/openscad to view the designs.
+# KiCAD 
+This folder contains electrical CAD designs. You'd need kicad version 5 or higher
 
-- `.pro` files are kicad files (ask Dilawar).
-- `.stl`, `.scad` can be viewed/edited on FreeCAD or openSCAD (ask Anzal KS).
+`.pro` files are kicad files (ask Dilawar).
+
+# 3dCAD
+
+This folder contains 3D cad designs for 3d printing etc. You'd need 
+`freecad` or `openscad` to view the designs.
+
+`.stl`, `.scad` can be viewed/edited on FreeCAD or openSCAD (ask Anzal KS).