A few years ago I played with a similar project. If you do not mind doing some calibration and making only simple shapes, you can do this with extremely cheap m

A few years ago I played with a similar project. If you do not mind doing some calibration and making only simple shapes, you can do this with extremely cheap materials (control coils for RC planes) https://blog.krastanov.org/2016/08/09/simple-analog-laser-projector/ https://blog.krastanov.org/2016/08/09/simple-analog-laser-pr...