RAMPS1.4 Laser Upgrade from J Tech Photonics, Inc.
Laser_power_inline - #101 by mentaldemise - Marlin - LightBurn Software Forum
Upgrading of a board with the Marlin firmware for laser engraving using an RAMPS 1.4 board as an example. - EnduranceLasers
Configuring and Using Reprap Ramps1.4 RRD Fan Extender : 3 Steps - Instructables
Dream Maker - Micro Multi-Tool CNC with 3D Printer, Lazer
GitHub - perivar/grblForRAMPS: RAMPS 1.4 fork of Grbl. An open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on a straight Arduino