Motor paso a paso

En mi caso el motor es un TSY28STH45-0674B

Esquema del montaje: 

 

Y ahora toca el código. Es el mismo que hay en los ejemplos del arduino pero allá va:

 

/* 
 Stepper Motor Control - one revolution
 This program drives a unipolar or bipolar stepper motor. 
 The motor is attached to digital pins 8 - 11 of the Arduino.
 The motor should revolve one revolution in one direction, then
 one revolution in the other direction.  
  
 Created 11 Mar. 2007
 Modified 30 Nov. 2009
 by Tom Igoe
*/

#include 
const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
                                     // for your motor
// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, 8,9,10,11);            

void setup() {
   // set the speed at 60 rpm:
   myStepper.setSpeed(60);
   // initialize the serial port:
   Serial.begin(9600);
}

void loop() {
   // step one revolution  in one direction:
   Serial.println("clockwise");
   myStepper.step(stepsPerRevolution);
   delay(500);
  
   // step one revolution in the other direction:
   Serial.println("counterclockwise");
   myStepper.step(-stepsPerRevolution);
   delay(500); 
}