9 Mar
2007
9 Mar
'07
12:17 p.m.
Randy Dawson wrote:
Popular Electronics had a lissajous figure generator
project to attach
to a scope in XY mode. Just a couple of slowly frequency and amplitude
ramping sine wave oscillators. I always wanted to drive some XY servo
mirrors and put that on the wall for a laser light show.
My XY mirrors came out of an old Pioneer laser disk player. (HeNe tube
too!) They would swing several degrees, with the mirrors mounted on a
voice coil like yoke over a magnet.
Randy
My girlfriend bought me a laser lissajous figure toy thing about a week
ago, by some odd synchronicity.
It has two angled mirrors spun by little motors, and you can change the
speed and direction to draw various patterns.
Gordon