2 DVD drives and a laser diode makes a simple engraver

http://www.3ders.org/articles/20150709-thingiverse-user-creates-an-amazing-3d-printed-photon-laser-engraver.html

http://www.3ders.org/images2015/thingiverse-user-isolt-shares-designs-for-amazing-1.jpg

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thinking about it… its all plastic and compact construction isnt the best thing with something capable of setting it on fire. it would be fine made of aluminum i think.

I like homemade tools like this, I might just try it!