I'm contemplating the best CAD program to use for the physical design (both 2d and 3D). I'm thinking I'll need some basic 2d drawings for the display layout, and 3D for printing out frames for the 7 segment digits. Finding free/open CAD has been a challenge in the past. I just can't find anything that I find easy to use. If all else fails I'll probably end up using the Autodesks 123D for modeling, not sure for 2D.

On a similar note, and in the spirit of openess, I'll have to download OpenOffice so I can document in a shareable format.

Goals for the weekend are, 

1. Get one PCB layout done and on order. I'm thinking the power supply since that is the smallest and should be easy to test. 

2. Physical design of the 7 segment display pieces. I'm thinking of a nice plastic holder to place the LEDs in that can be easily attached to a panel of some sort.

3. Stretch goal, complete a second PCB layout. The LED drive would be good because that is also small and easy to test out of system.

Edit: CAD links to check later.

http://www.doublecad.com/DoubleCAD/DoubleCAD-XT-v5

http://www.3ds.com/products-services/draftsight/overview/

http://nanocad.com/page/FAQ (*free with registration required)