Arduino Motor Shield Rev3

Arduino code example:

#include 
 
 const int stepsPerRevolution = 48;  // change this to fit the number of steps per revolution
                          // for your motor
 
 // initialize the stepper library on the motor shield
 Stepper myStepper(stepsPerRevolution, 12,13);     
 
 // give the motor control pins names:
 const int pwmA = 3;
 const int pwmB = 11;
 const int brakeA = 9;
 const int brakeB = 8;
 const int dirA = 12;
 const int dirB = 13;
 
 int x = 0;
void setup() {
 Serial.begin(9600);
 // set the PWM and brake pins so that the direction pins  // can be used to control the motor:
pinMode(pwmA, OUTPUT);
 pinMode(pwmB, OUTPUT);
 pinMode(brakeA, OUTPUT);
 pinMode(brakeB, OUTPUT);
 digitalWrite(pwmA, HIGH);
 digitalWrite(pwmB, HIGH);
 digitalWrite(brakeA, LOW);
 digitalWrite(brakeB, LOW);
 
 // initialize the serial port:
 Serial.begin(9600);
 // set the motor speed (for multiple steps only):
 myStepper.setSpeed(2);
 }

 
 void loop() {
 
  myStepper.step(48);
  myStepper.step(-48);

  delay(2000);

 }