My stepson wanted to play videos and games while lying in bed. This bracket fits an 80 mm thick mini led projector and points it at the ceiling. An interlocking gear design allows the bracket to be set for 10 degree increments. Just print 2 of these sets and glue them to a piece of plastic sheet or use dowels pipes or tubes to stabilize them. The brackets may be set and locked with nylon zip ties.

The openscad file can be adjusted for larger or smaller projectors or simply scale the stl files.