Stepper motor code question

Projects General Guidance
2

Hi @paulwece
In order:

  1. Read the topic " How to get the best out of this forum ";

  2. When posting sketch in topic format it, and use </> tags;

  3. These instructions do the following: (Simplified explanation).
    PORTD |= (1 << 2) and PORTD &= ~(1 << 2).
    PORTD |= (1 << 2) . Shift the number 1 to the left 2 bits and write to PORTD.
    << means shitf left
    PORTD &= ~(1 << 2). Shift the number 0 to the left 2 bits and write to PORTD.
    ~ means the inverse of 1 = 0.
    Port D bit 2 is pin 2 of the arduino and in the sketch it was used for step;

  4. The project author uses Serial.begin(9600) for DEBUG, but it can be removed.

  5. I don't recommend using the USB 5V source as a stepper motor consumes a lot of
    current and the USB can be damaged.
    Also 5V is not a good voltage to move stepper motors.

RV mineirin