OK, what's the solution for PWM to a laser? - Laser Cutting - Inventables Community Forum
3-Axis 32-bit ARM Based CNC Controller,GRBL 1.1F USB Port CNC Engraving Machine Control Board with Fan Cooling,Support 500W Spindle/NEMA23 Stepper Motor/Laser (A4988+Fan) - - Amazon.com
GRBL Fire Button - #20 by matmatth95 - GRBL - LightBurn Software Forum