Hoping I could get some help with my project.
I have build a cnc mill and am using an uno and a cnc shield v3.00, with grbl 1.1e.
I would like to add 12 or so indicator lights without adding/modifying grbl in any way.
What I wanted to do is add an led to the pin inbetween the arduino and the shield, so I know what the pin is doing with out looking back at the pc screen.
I did test just one LED from the spindle enable pin to ground and it did work at I wanted but did not try sending any g-code and test again.
I am learning about electrics but am unsure of what would happen to the hardware and the g-code with the added LEDs.
I have seen a video of someone putting indicator lights on the direction pin to the stepper driver and it lighting on a movement/hold of the motor.
This is ultimately the goal here. I just want clarification on the application I wanted
Thank you for reading this