Arduino ULN2009驱动步进电机

一.实物图

二.例子代码

注:代码来自老外 http://www.4tronix.co.uk/arduino/Stepper-Motors.php

功能:控制电机正反转

// This Arduino example demonstrates bidirectional operation of a

// 28BYJ-48, using a ULN2003 interface board to drive the stepper.

// The 28BYJ-48 motor is a 4-phase, 8-beat motor, geared down by

// a factor of 68. One bipolar winding is on motor pins 1 & 3 and

// the other on motor pins 2 & 4. The step angle is 5.625/64 and the

// operating Frequency is 100pps. Current draw is 92mA.

////////////////////////////////////////////////

//declare variables for the motor pins

int motorPin1 = 8;    // Blue   - 28BYJ48 pin 1

int motorPin2 = 9;    // Pink   - 28BYJ48 pin 2

int motorPin3 = 10;    // Yellow - 28BYJ48 pin 3

int motorPin4 = 11;    // Orange - 28BYJ48 pin 4

                        // Red    - 28BYJ48 pin 5 (VCC)

int motorSpeed = 1200;  //variable to set stepper speed

int count = 0;          // count of steps made

int countsperrev = 512; // number of steps per full revolution

int lookup[8] = {B01000, B01100, B00100, B00110, B00010, B00011, B00001, B01001};

//////////////////////////////////////////////////////////////////////////////

void setup() {

  //declare the motor pins as outputs

  pinMode(motorPin1, OUTPUT);

  pinMode(motorPin2, OUTPUT);

  pinMode(motorPin3, OUTPUT);

  pinMode(motorPin4, OUTPUT);

  Serial.begin(9600);

}

//////////////////////////////////////////////////////////////////////////////

void loop(){

  if(count < countsperrev )

    clockwise();

  else if (count == countsperrev * 2)

    count = 0;

  else

    anticlockwise();

  count++;

}

//////////////////////////////////////////////////////////////////////////////

//set pins to ULN2003 high in sequence from 1 to 4

//delay "motorSpeed" between each pin setting (to determine speed)

void anticlockwise()

{

  for(int i = 0; i < 8; i++)

  {

    setOutput(i);

    delayMicroseconds(motorSpeed);

  }

}

void clockwise()

{

  for(int i = 7; i >= 0; i--)

  {

    setOutput(i);

    delayMicroseconds(motorSpeed);

  }

}

void setOutput(int out)

{

  digitalWrite(motorPin1, bitRead(lookup[out], 0));

  digitalWrite(motorPin2, bitRead(lookup[out], 1));

  digitalWrite(motorPin3, bitRead(lookup[out], 2));

  digitalWrite(motorPin4, bitRead(lookup[out], 3));

}