Circuit for a simplified DIY galvanometer? Answered
I'm putting together a DIY performance lighting show set as a project and I'm currently working on the laser aspect of it. I've looked into the Galvanometers, which are used in laser shows and those units go anywhere from $60 to $200 a pop. So One thing is that I don't need to create any advanced imagery, I just need to vibrate a mirror at a fast enough rate in order to make a laser spread. My current solution is this:
Basically a small motor pivoting a mirror along the axis. What I am wondering is, is there something more suited for this that isn't a motor or an expensive galvanometer. I've seen people attach a small speaker and supplying a pulse signal to make the speaker membrane rock back and forth. The volume of the sound would control the amplitude of the vibration but the downside is that it's actually audible, even more so than the motor.
I remembered this episode of ElectroBoom, where a coil wound around a hollow cylinder would produce a magnetic field which would pull a metal object towards the center.
Before I would go off trying to attach a metal rod to a spring and repeatedly turn the electric magnet on and off to simulator osculation. Perhaps people would know of something like that which already exists?