Etching PCBs goes a lot better if you agitate the solution ... He ended up basing his agitator on a broken CD-ROM drive instead of starting from scratch. He uses the CD sled from the drive ...

[Neumi] has built a CNC Laser using CD-ROM drives as the X and Y motion platforms ... in the video is exposing pre-coated photo-resist PCBs. With $61 US Dollars (55 Euro) for the Arduino, stepper ...