This project uses an Arduino, a pair of speakers, and a laser pointer to create a laser projector able to trace out designs in a dark room. To power it, I've cannibalized a PC ATX power supply capable of delivering plenty of current for the speakers.
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.