arduino ULN2003 步进电机不走动解决方法

解决方法1
库里面Stepper.cpp文件改如下代码

  if (this->pin_count == 4) {
    switch (thisStep) {
      case 0:  // 1010
        digitalWrite(motor_pin_1, HIGH);
        digitalWrite(motor_pin_2, LOW);
        digitalWrite(motor_pin_3, LOW);
        digitalWrite(motor_pin_4, LOW);
      break;
      case 1:  // 0110
        digitalWrite(motor_pin_1, LOW);
        digitalWrite(motor_pin_2, HIGH);
        digitalWrite(motor_pin_3, LOW);
        digitalWrite(motor_pin_4, LOW);
      break;
      case 2:  //0101
        digitalWrite(motor_pin_1, LOW);
        digitalWrite(motor_pin_2, LOW);
        digitalWrite(motor_pin_3, HIGH);
        digitalWrite(motor_pin_4, LOW);
      break;
      case 3:  //1001
        digitalWrite(motor_pin_1, LOW);
        digitalWrite(motor_pin_2, LOW);
        digitalWrite(motor_pin_3, LOW);
        digitalWrite(motor_pin_4, HIGH);
      break;
    }
  }

解决方法二
改PIN脚顺序

Stepper myStepper(motorSteps, 8,9,10,11);
改为
Stepper myStepper(motorSteps, 8,10,9,11);

步进电机驱动源码

/* Stepper Motor Control */

#include <Stepper.h>
const int stepsPerRevolution = 180;
// 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);
   */
}