Using Fusion 360 version 2.0.3125
Use sketch tool to create rectangular shape of box (size of Arduino) and add in Arduino mounting holes (should reference Arduino UNO drawing for physical dimensions)
Make sure you select the rectangular body and the 4 holes (5 objects selected) when you extrude to get a fully enclosed box:
Select Shell on the body type just created and do 1.6mm outside
Create a midplane and the split the body so you have a top and bottom half
Add support pins
Add some 4mm standoffs
Add 10mm standoffs for connecting top lid
Add chamfer to stand off connectors so they will fit
Bring in Arduino 3D model and create joint so it’s placed on bottom of case
One of the dimensions I used was incorrect or the 3D model I imported of
the Arduino board was different from the original because the audio port got cut off
but since this is just a test case I’m going to leave it as is.
View of final design
Can save the top and bottom lid as STL file for 3D printing
Loaded bottom lid enclosure onto Shapeways website for 3D printing and it passed automatic checks and estimates 13.77 USD to print.