NOTE: I am using a 650nm laser module, not 606nm. Sorry about the mistake.
I love listening to, and playing music. I also enjoy playing with lasers, and using wireless technology! Why not combine these geeky interests to make my own wireless audio transmitter? You can wirelessly transmit music/data using all sorts of other technologies, but this project will utilize a portion of the visible light spectrum through a laser. This is a perfect project for kids wanting to clinch a science fair ribbon too. Wow the judges by using a laser pointer to transmit your favorite song from across the hall! I ran tests in the video at a short distance, but it works flawlessly for at least several tens of meters. If you want to know how the system works, visit my blog.