UPDATE: I uploaded a new STL.
There are plenty of arduino holders on thingiverse but not a lot that combine the power of the arduino uno and the mighty breadboard. A friend of mine requested to make a holder that can hold them both and have a visual pleasing but functional design. This is what I came up with.
This is a slight modification to my previous design so it holds large breadboards instead of the half-size breadboards.
It will fit arduino UNO's only as far as I now (they have rounded corners) together with a half-sized breadboard. Don't worry about the double-sided tape that's normally on the bottom breadboard. It has been designed to have enough room for it.
Design was created in Sketchup.
If you print this, please click the "I made one" on this thingiverse page.
I printed this:
layer height: 0.25mm
travel feedrate 100 mm/s
Printed on a makerbot replicator 2 in PLA.