Hi guys, I'm looking for a way to make a sort-of-a laser show ( i.e. like write something on a wall, or draw a shape ).
Probably the professional method of choice would be to use galvanometers ( http://www.aliexpress.com/item/LP-8K-Mini-Galvo-System-laser-Galvanometer-Based-Optical-Scanner/677222002.html ), but the cheapest I could find are >120$ and have a pretty big drive box.
Trying to make my own galvos from a speaker, as shown here http://www.instructables.com/id/Arduino-Laser-Show-with-Full-XY-Control/ , would be way messy, big and inaccurate.
So here's the idea I came up with - I could use two simple DC motors with mirrors attached to them and a hall sensor, that would tell arduino its position. And have arduino turn the laser on and off at the right time.
What do you think? :)