风扇模块由精密的N20电机、电机驱动和螺旋桨构成，主要用于搭建风车、DIY电风扇、制作灭火机器人等应用。

该模块使用LG-L9110（H桥）芯片驱动电机。可通过INA，INB的电平组合实现正转、反转、刹车、高阻4种状态。

参数表

风扇模块采用的是L9110马达驱动控制芯片，

风扇模块原理图：

示例代码：

#define M1 2

#define M2 3

int8_t MSpeed = 0;

uint8_t Dir = 0;

void setup() {

  // put your setup code here, to run once:

  pinMode(M1, OUTPUT);

  pinMode(M2, OUTPUT);

  InitTimer2();

}

void InitTimer2(void)   //100us@12.000MHz

{

  TCCR2A=0;

  TCCR2B=_BV(CS21)|_BV(CS20);

  TIMSK2=_BV(TOIE2);

  TCNT2=206;

  sei();

}

ISR(TIMER2_OVF_vect)

{

  TCNT2=206; //定时器中断  100us

  MotorPwmCtrl();

}

void MotorControl(int8_t Speed)

{

  if (Speed >= 0)

  {

    Dir = 1;

    MSpeed = Speed;

  }

  else

  {

    Dir = 0;

    MSpeed = -Speed;

  }

  MSpeed /= 10;

}

void MotorPwmCtrl(void)

{

  static uint8_t time = 0;

  if (time < MSpeed)

  {

    if (Dir)

    {

      digitalWrite(M1, HIGH);

      digitalWrite(M2, LOW);

    }

    else

    {

      digitalWrite(M2, HIGH);

      digitalWrite(M1, LOW);

    }

  }

  else

  {

      digitalWrite(M1, LOW);

      digitalWrite(M2, LOW);

  }

  if (++time >= 10)

  {

    time = 0;

  }

}

void loop() {

  // put your main code here, to run repeatedly:

  static uint32_t timer;

  static uint8_t n = 0;

  if (timer > millis())

    return;

  if (n == 0)

  {

    MotorControl(100);

    timer = millis() + 2000;

    n = 1;

  }

  else if (n == 1)

  {

    MotorControl(0);

    timer = millis() + 2000;

    n = 2;

  }

  else if (n == 2)

  {

    MotorControl(50);

    timer = millis() + 2000;

    n = 3;

  }

  else if (n == 3)

  {

    MotorControl(-50);

    timer = millis() + 2000;

    n = 0;

  }

  }