There are some unknowns here with respect to hooking up your laser. The biggest is what voltages of PWM will it accept. If it can handle 3.3V or 5V PWM signals, then you have a good shot of hooking your laser up without any additional electronics. I searched the VEVOR website and did not find your laser module. I’m assuming it is powered by 12V. I suggest this recipe:
- Use the firmware from V1 unmodified.
- Have the laser switch in the off position.
- Use the 2 + 2 → 3 pin cable
- Supply 12V power from a second power supply to the black and red wires. Don’t try and draw power from the control board. Red will be positive, and black will be ground.
- Plug the yellow and white wires into the PC9 pin and the ground pin just to the left in the picture I provided above. I cannot clearly see the connection, but I believe the white wire is ground and the yellow is the signal that should be connected to PC9.
- Test with the g-code file attached to the first post in this topic.