Hi, I'm using Arduino Uno with the DFRobot dual stepper motor shield to run two stepper motors. The shield slots into the Uno as it has pins on the bottom that fit into the Uno's left and right pin banks.
The shield works just fine in that I can operate the stepper motors connected to it via the Arduino as intended. However, I've noticed that when it is operating, the orange LED on the UNO lights up even though my code does not use pin 13 at all. I was under the impression that the LED only lights up when I execute a digitalWrite(HIGH) command on pin 13 so I would be interested to know why this is happening.
I come from a software development background so I apologize if I am missing something obvious.