In this video Davide Gironi demonstrates hisĀ DIY A4 laser engraver made from a scanner and a printer on ATmega328:
This “Get Ready For Win98” Laser Engraving Machine it’s built using an old scanner, and an old printer.
A laser engraving machine is a tool that uses lasers to engrave an object.
Project info atĀ Davide Gironi blog.

Fantastic.