I used Arduino Uno boards in couple of my projects based on size 20 V-slot aluminium beams. I designed this bracket to keep some order, protect controllers and be able to move my contraptions without loose boards dangling on cables. It is possible to fit a standard 400 point breadboard on the bracket. The bracket was originally designed in Autodesk Fusion360. NOTES: - This design works with original Arduino Uno Rev.3 board kit which includes a plastic base plate. - The variant presented here requires access to the end of the beam to be mounted (slid in). - Due to sligth variations in the design/size of breadboards there may be fitting problem with some of them (however all bords I have fit properly).