UNO/Breadboard cradle

thingiverse

I get tired of wires popping off my projects when I move them around. I have done the bit where you screw breadboards to a wood plank and that was never very satisfying - it was either too big and clunky or one breadboard less than the number I eventually needed. (Feature creep is a fact of life for makers!) I also wanted my UNO mini breadboard to be on the same plane as my add-on breadboards. This is a modular system where you can start with an UNO cradle and add as many breadboard cradles as you need. If the project grows you can add middle units as needed. Key features: the unit-to-unit attachment holes are on 4" centers, 3/8" of an inch from the support surface. I sized the holes and pocket for #6-32 (M3.5x .6) hardware. There is one unit designed to support a single board, a "side" unit that can be paired for two boards, and a "middle" unit that can be used to expand to as many boards as you need. The unit breadboard size is 6.5" x 2.25" (165 mm x 57 mm). Each added unit is multiples of this size. There is a hole in the center web that allows a small Phillips screwdriver to access the hardware to snug it up - see the photo for details. The side tabs are pitched to hold my old E&L boards, but they seem to work pretty well with my smaller Global Specialities units. I have pegs to fit through standard UNO mounting holes. These pegs tend to break off with standard PLA. PLA-Plus seems to be holding up pretty well. I added a version with holes for 4-40 (Metric M3x .5) plastic self-tapping screws (and fiber washers). I am open to adding modules to the basic parts such as different unit sizes or a MEGA cradle. Feel free to let me know what you are thinking in the comments.