It's like a laser connected to a radio or something. The lasers oscillate at frequencies that you control using the radio tuner. The laser makes cool pictures, including stars, circles, swirlies, squares, zig zags, etc.

have never heard of it but let us know how it turns out because it sounds really cool. And i could use one of them in my box of trix.

 

as for info try google.com

 

Jamesy

I would think that its something like a laser light show? You could probably check out a toy store for a simple, dulled-down one, but any company that puts on a little light show might know something about them...undoubtedly more than I do

i dont know what its called or where you can get one, but i have made one before. attach a mirror, or a cd, or some other reflective surface, to the moving part of a speaker, point a laser at it and watch the pretty pictures on the wall.

hehehehe Cali, I`ve done the same myself

 

I used a beam spreader though and actualy got an osciloscope trace on my wall, all you need to do is adjust the spin rate of the hex mirror, and Robert is very much your Auntys Brother

Ah, thanks, yeah that's the one.

 

YT, can you describe the rotating mirror one?

Do all sound cones vibrate with the same intensity? I'm thinking of using a sound cone from an "Electronic Playground." Will it not vibrate as much as a radio's?

the rotating Hexagonal mirror I got out of an old B/W laser printer, it works on 24 volts, and can go that fast it Whistles! and has a strong Gyroscopic force when you try to move it. I`m fairly sure you can get smaller cheaper ones from these DIY shops.

these laser "Straight Edges" used for putting up shelves and false ceilings so they stay level. I`ve seen them as cheap as £15 in the warehouse, complete with Tripod

 

I used an old 8" car speaker and glued the Laser diode onto the center of the cone (only a cheap £5 laser pointer, the sort you get on a keyring from Blackpool

 

it worked remarkably well

It could also be laser sent through a pair of perpendicularly oriented acousto-optic modulators. But mirrors on a piezo crystal is more likely.