Hi everybody! I know this is old but I recently bought a used K40 laser machine and I'm converting it to a bigger area and a new controller. As I had an Arduino Due laying around, which I was afraid to use on a 3D printer with the FD, I decided to use it on a laser because there was no danger of a heating MOSFET turning on by accident. Simply there are no heaters. So, in short, thanks to this moby Catarino - RAMPS Electronics