I could use a little direction on by laser engraver project. So far my setup is I have the RP2 running the Arduino software which is controlling a Arduino Mega 2560 controller that has a Adafruit stepper cnc motor shield to run the stepper motors. Where i'm hanging up is with the laser and controlling it. I found a 2 watt laser (link below) that i'm wanting to use. I've got the correct driver and a durable enough heat sink for this laser. Reading other projects I keep hearing about controlling the laser by TTL which i'm not really familiar with. Or is there a way i can have the arduino Mega send a simple enable command for when the laser needs to turn on.