Most of this project was directly adapted from the excellent Arduino Laser Show with Full X-Y Control by Rich Olson / nothinglabs.
About me: I'm Joseph Long, a physics student at Pomona College in Claremont, CA. This was made as my final project for our electronics class. I owe a great deal of thanks to my professor, Dr. Dwight Whitaker; our machinist, Glenn Flohr; our electrician, Tony Grigsby; our TA, Jonathan Raiman; Dr. Kwok; and all of my classmates.
Step 1: The Big Idea
Unfortunately, procuring galvos can be really expensive (especially getting just two for a project)! Instead, we're going to use regular old speakers to move our mirrors. And we're going to use the Arduino to adjust the speakers so fast that they'll create the kind of persistent image we want.