I needed some shelves in my office, so I designed and printed some cool looking shelf brackets! This is a 3" angle, meant to be used with (2) screws into your shelf and (1) screw into your wall. Use a board 6" deep or less. The picture shown is a 5" deep board, 24" wide. The strength of your shelf with depend mostly on your wall anchors. I recommend drilling into a stud OR using a 50lb wall anchor.
Print (2) per shelf, I used 25% density, 3 shells, 3 layers top and bottom. You will need (2) screws per bracket to mount your board and (1) screw (with anchor!) to mount to the wall.