19 Jul
2016
19 Jul
'16
1:22 p.m.
From: Mouse
I'm wondering how practical it might be to take a
laser and turn it
into a vector display on a handy blank wall
Those have been around for decades - I recall seeing them used to draw things
on the sides of building, _many_ moons ago. I'm assuming they bounce the beam
off a mirror, and actuate the mirror, but I don't actually know how they
worked.
Noel