CR-10 / Ender 3 Laser mount

I wanted to use my CR-10 Mini 3D printer as a laser engraver.
I bought a 1.6W UV laser from China that I wanted a fast way to attach and detach from my printer. I opted to attach it with magnets and a custom bracket that fits the side of the hotend enclosure.

I cut the part cooling fan cable so that I could tap into it's 12v PWM signal. With an Arduino and a voltage divider I take that signal and create a 5v pwm signal for the printer. I also build an enclosed for the electronics and added