The context is that I want to build a tunnel laser effect, that modulates the angle of the cone according to a sine wave. The purpose being, to create a cool Borg weapon effect for a Star Trek Borg cube model.
Constraints are size (8 inch cube) and cost (just a model, so not looking for a lot).
The tunnel laser seems easy, angled mirror on a motor deflecting the laser. The trouble is in modulating the angle. One method I've thought of is to modulate the motor speed, to increase/decrease the centrifugal force, which will push the mirror into a more flat shape (with some sort of spring tension resisting it) as it increases.
My question is generally what's the easiest way of modulating a voltage/motor according to a sine wave?
I have thought of maybe getting a Raspberry Pi with controller board for this, but I don't know much about the available controllers.
I wonder if perhaps there exists some sort of X-Y controller motor package for manually setting the laser direction at high speed? Which is what I believe the high end laser effects use.
