I could use a little direction on my laser engraver project. So far my setup is I have the RP2 running the Arduino software which is controlling the Arduino Mega 2560 controller that has an Adafruit gShield stepper motor controller. Where I'm hanging up is with the laser and how exactly to control 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 to run continuously. 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?