The circuit for the xylophone lives primarily on three proto boards. These boards are mounted vertically on the 20x20 aluminum extrusions with braces and coupling plates. You can use either aluminum versions of these pieces or 3D print them.
You'll need:
- Four double corner braces
- Two 3 hole coupling plates
- Five M4 screws
- Five M3x10 screws
- One M3x16 screw
- One M4 nut
- Four slim T-Nuts
- Six M3 standoffs
- Six M3 washers (optional)
The washers are helpful if you're using the aluminum versions of the parts, since the holes can be slightly over-sized for the M3 hardware.
Using the opposite far hole on the double corner brace, attach the 3 hole coupling plate with the M3x16 through the coupling plate's left hole. Attach the standoff to the screw.
Attach the coupling plate to the corner brace using the M4 screw and the coupling plate's center hole. Secure it with an M4 nut.
With the two remaining assembled corner braces, attach an M3 standoff with an M3 screw in the open far hole.
When you're finished, the four mounts should look like the four pictured below.
