Air Compressor - Homemade air compressor adapted from a surplus refrigerator unit. Compression fitting was constructed from a combination of male and female fittings, rubber washers, and steel washers.
How to make mini CNC plotter using scrap DVD drive, motor shield & arduino
Arduino-based Laser-cutter from used DVD-R drives! Looks more like an old fashion electric chair
Davide Gironi: x Laser Engraver build using CD-ROM/Writer on
RepRap: Builders: selective laser sintering part reciprocating laser cutter