How you mount an art projector depends on your workspace and the type of projector you are using. A lightweight and wireless projector will be easier to set up. There are various type of equipment that can be used.
Elecwave Micro Projector Model:S6
Manfrotto 244 Variable Friction Magic Arm with Camera Bracket ($128)
Manfrotto Super Clamp 035 ($25)
Vivitar Tripod Model 1100 ($ ? )
Yi Selfie Stick ($20 ? )
11" Inch Articulating Magic Arm + Super Clamp Crab Plier Clip ($15)
Camera Table Clamp Mount ($10)