Ok so I’m getting crazy with this search.
I remember I saw somebody in the forum posting/talking about a device (remote controlled) to block the beam of light in a projector. Just a step motor and a remote receiver, but nicely done.
The usual purpose was to get rid of the ugly visible gray square when the projector sends a off signal (black).
I can’t figure out who, or where to find any info about it.
If anybody could help me out to get some sleep tonight