Arduino push button not responding when in line with resistor

Other Hardware General Electronics
5

Will there ever be a non-integer number of steps per revolution, like 30.073?

When you calculate this:

const float STEPS_PER_OUT_REV = STEPS_PER_REVOLUTION * GEAR_REDUCTION;

You might not end up with the number you expect due to floating point truncation. When I was in school, some people answered exam questions with answers like, "2.9999999" because the calculators the school lent out, didn't round numbers. All those people got half marks.

Also, 5 milliseconds is very near the borderline for some switch bounce, it's really too short for some.

You never need to check a value you've already checked. So this:

  if(isOpen == LOW)
  {
    delay(1000);
  }else if(isOpen == HIGH)
  {
    delay(5);
  }

would be better expressed:

  if(isOpen == LOW)
  {
    delay(1000);
  }
  else
  {
    delay(5);
  }