arduino学习笔记17－步进电机试验前几天我也试验了一下，用的是28BYJ-48 Stepper Motor 12V+ULN2003APG改了改一个代码，现在的效果是电位计控制正反转

/*

This program drives a unipolar or bipolar stepper motor.

The motor is attached to digital pins 8 - 11 of the Arduino.

Created 11 Mar. 2007

Modified 30 Nov. 2009

by Tom Igoe

*/

#include <Stepper.h>

const int stepsPerRevolution = 64;  // 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);   

const int aInPin=A0;

int val;

void setup() {

  // set the speed at 60 rpm:

  myStepper.setSpeed(200);

  // initialize the serial port:

  Serial.begin(9600);

}

void loop() {

  val=analogRead(aInPin);

  val=map(val,0,1023,0,99);

  Serial.println(val);

  // step one revolution  in two direction:

  if(val>50){

    Serial.println("clockwise");

    //原library是整步,整步走的角度是半步走的角度的两倍,半步走的声音比较小,平稳些,启动时最好是半步的走比较稳定

    //022中library修改为半步模式不成功？？？FUCK

    //四拍运行时步距角为θ=360度/（revolution*4）（俗称整步），八拍运行时步距角为θ=360度/（revolution*8）（俗称半步）

    myStepper.step(stepsPerRevolution/2);//

    delay(500);

  }

  else{

    // step one revolution in the other direction:

    Serial.println("counterclockwise");

    myStepper.step(-stepsPerRevolution/2);

    delay(500);

  }

}