engravR simple RasPi powered laser engraver made from DVD RW drives

engravR is a Raspberry Pi powered simple to DIY laser engraver built primarily using two old DVD RW drives.
Code for it is available at:

https://github.com/iandouglas96/engravR

Detailed building guide of base model is here:

http://funofdiy.blogspot.com/2013/10/a-raspberry-pi-controlled-mini-laser.html

See other laser project:

http://diy3dprinting.blogspot.com/2013/09/more-diy-reprap-laser-cutters-and.html

Source:

https://www.youtube.com/user/qwertyp96?feature=watch