51stc15WS104 controls ULN2003A stepper motor

Imitate Taobao's board and make an open source project to facilitate everyone's research and use. The board is minimized. , I found a lot of ULN2003 boards on the Internet, and there are a lot of miscellaneous circuits in them, which is not what we want at all. This is the simplest one. You can directly copy and paste it, which is very convenient.

#include <Arduino.h>

#define A1 2            //引脚命名
#define B1 3
#define C1 4
#define D1 5

void setup()
{
    pinMode(A1,OUTPUT);     //设置引脚为输出引脚
    pinMode(B1,OUTPUT);
    pinMode(C1,OUTPUT);
    pinMode(D1,OUTPUT);
}

void loop()
{
    Phase_A();          //设置A相位
    delay(2);           //改变延时可改变旋转速度

    Phase_B();          //设置B相位
    delay(2);      //改变延时可改变旋转速度

    Phase_C();          //设置C相位
    delay(2);      //改变延时可改变旋转速度

    Phase_D();          //设置D相位
    delay(2);      //改变延时可改变旋转速度

}

void Phase_A()
{
    digitalWrite(A1,HIGH);      //A1引脚高电平   
    digitalWrite(B1,LOW);
    digitalWrite(C1,LOW);
    digitalWrite(D1,LOW);
}

void Phase_B()
{
    digitalWrite(A1,LOW);   
    digitalWrite(B1,HIGH);      //B1引脚高电平   
    digitalWrite(C1,LOW);
    digitalWrite(D1,LOW);
}

void Phase_C()
{
    digitalWrite(A1,LOW);   
    digitalWrite(B1,LOW);
    digitalWrite(C1,HIGH);      //C1引脚高电平   
    digitalWrite(D1,LOW);
}

void Phase_D()
{
    digitalWrite(A1,LOW);   
    digitalWrite(B1,LOW);
    digitalWrite(C1,LOW);
    digitalWrite(D1,HIGH);      //D1引脚高电平   
}