Seems simple enough build with everything coming from Radio Shack (which may no longer exist in a few months). This could be a nice addition to a CNC to burn patterns (note not cut…will need more juice for that). Me…I haven’t started playing with lasers yet. Been too skittish for it just yet.
http://www.instructables.com/id/Easy-Build-Burning-Laser-For-Less-Than-20/