درایور استپر موتور DRV8825

example
Although understanding the ins and outs of the A4988 and the DRV8825 may have been difficult, the advantages of using them are clear.
The code necessary for its control is extremely simple, which makes them very practical and useful components to use.
We simply have to indicate, using two digital outputs, the instant at which we want the motor to advance one step, and the direction of rotation.
The speed of rotation is controlled by the time we allow to pass between steps.
The following example rotates the stepper motor one revolution in one direction, and two in the opposite direction at a slightly higher speed.

const int dirPin = 8;
const int stepPin = 9;

const int steps = 200;
int stepDelay;

void setup() {
  // Marcar los pines como salida
  pinMode(dirPin, OUTPUT);
  pinMode(stepPin, OUTPUT);
}

void loop() {
  //Activar una direccion y fijar la velocidad con stepDelay
  digitalWrite(dirPin, HIGH);
  stepDelay = 250;
  // Giramos 200 pulsos para hacer una vuelta completa
  for (int x = 0; x < steps * 1; x++) {
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(stepDelay);
    digitalWrite(stepPin, LOW);
    delayMicroseconds(stepDelay);
  }
  delay(1000);

  //Cambiamos la direccion y aumentamos la velocidad
  digitalWrite(dirPin, LOW);
  stepDelay = 150;
  // Giramos 400 pulsos para hacer dos vueltas completas
  for (int x = 0; x < steps * 2; x++) {
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(stepDelay);
    digitalWrite(stepPin, LOW);
    delayMicroseconds(stepDelay);
  }
  delay(1000);
}