(아두이노) L9110 Motor Driver (Fan Motor)

선풍기로 사용하기에는 모터가 좀 약해보인다. INA와 INB를 PWM 핀에 꽂으면 속도 조절이 가능해진다. 아무데나 꽂는 습관이 있었는데 PWM 핀에 안 꽂으니 안 되더라(우노 호환보드 싸구려).

 

간단한 설명서 파일 첨부.

 

10.KEYES L9110 Fan Module.doc

0.11MB

 

깃허브에서 찾은 드라이버 라이브러리

https://github.com/rydepier/L9110-Motor-Driver-and-Fan-motor-for-Arduino./tree/master

GitHub - rydepier/L9110-Motor-Driver-and-Fan-motor-for-Arduino.: Using the Keyes Motor and fan board

 

1. 0~255 속도를 지정할 수 있는데 처음에는 속도 조절 없이 최대 속도로 돌아가다가, for 문에서 속도 조절을 시도했다. 방향 전환까지.

int INA = 5;
int INB = 6;

void setup()
{
  pinMode(INA,OUTPUT);
  pinMode(INB,OUTPUT);
}

void loop()
{
  // full speed : forward
  digitalWrite(INA,LOW);
  digitalWrite(INB,HIGH);
  delay(3000);
  digitalWrite(INA,HIGH);
  digitalWrite(INB,HIGH);
  delay(3000);
  // full speed : forward
  digitalWrite(INA,HIGH);
  digitalWrite(INB,LOW);
  delay(3000);
  digitalWrite(INA,LOW);
  digitalWrite(INB,LOW);
  delay(3000);

  // speed control forward
  for (int speed = 0; speed < 256; speed += 1) {
    analogWrite(INA, 0);
    analogWrite(INB, speed);
    delay(20);
  }
  delay(1000);
  for (int speed = 255; speed >= 0; speed -= 1) {
    analogWrite(INA, 0);
    analogWrite(INB, speed);
    delay(20);
  }
  delay(1000);

  // speed control backward
  for (int speed = 0; speed < 256; speed += 1) {
    analogWrite(INA, speed);
    analogWrite(INB, 0);
    delay(20);
  }
  delay(1000);
  for (int speed = 255; speed >= 0; speed -= 1) {
    analogWrite(INA, speed);
    analogWrite(INB, 0);
    delay(20);
  }
  delay(1000);

}

https://www.youtube.com/shorts/VWuEnBRpffc

 

 

2. 아래 코드는 L9110 용 간단한 라이브러리인데 핀모드 설정 시에,

pinMode(pushButton, INPUT_PULLUP);

를 설정해줘야 한다.

 /***********************************************************
 * Fan Driver using L9110 Motor Driver
 * 
 * The L9110 Motor Diver is a simple driver designed for
 * toys and robots. It has two inputs INA and INB
 * and two outputs to drive a simple DC Motor.
 * 
 * The direction of motor spin can be changed and the speed 
 * can be controlled using PWM
 * 
 * The device described here is the Keyes Fan Board with 
 * 4 connections
 * 
 * Connections:
 * 
 * INA to Arduino PIN 5
 * INB to Arduino PIN 6
 * Vcc to Arduino 5 volts
 * GND to Arduino GND
 * 
 * Push Button:
 * (the output went LOW on pressing on my unit)
 * Gnd to Arduino Gnd
 * Vcc to Arduino 5 volts
 * S to Adduino PIN 7
 * 
 ***********************************************************/
 // INA, INB should(!) go to PWN pin of Arduino for speed control.
 
const int INA = 5;
const int INB = 6; 
const int pushButton = 7;
const int ledPin = 13; // onboard LED
int action = 0; // 0 = Stop, 1 = Forward, 2 = Reverse

byte speed = 150; // change this to alter speed 0 - 255 although 80 is the minimum for reliable operation
 
void setup() 
{ 
pinMode(INA,OUTPUT); 
pinMode(INB,OUTPUT); 
pinMode(pushButton, INPUT_PULLUP);
pinMode(ledPin, OUTPUT); // onboard LED
Serial.begin(9600); // for debug
}
 
void loop() 
{
  if (digitalRead(pushButton) == LOW){ // see if button has been pressed
    digitalWrite(ledPin, HIGH); // turn on LED
    action = action + 1; // increment action
    if(action > 2){
      action = 0; // keep action in range
    }
    if (action > 0){
      digitalWrite(ledPin, HIGH); // Turn OFF LED if motor stopped
      stopFan();
      delay(100); // short delay to make direction change easier for motor
    }
    else   digitalWrite(ledPin, LOW); // turn onboard LED OFF
    delay(800); // simple switch debounce
  }

  switch (action){
    case 0:
    Serial.println("Stop Fan:");
    stopFan();
    break;

    case 1:
    Serial.println("Fan Forwards:");    
    forward();
    break;

    case 2:
    Serial.println("Fan Reverse:");
    reverse();
    break;
  }
}

void reverse(){
  analogWrite(INA,0);
  analogWrite(INB,speed);   
}


void forward(){
  analogWrite(INA,speed);
  analogWrite(INB,0); 
  
}

void stopFan(){
  digitalWrite(INA,LOW);
  digitalWrite(INB,LOW); 
}

https://www.youtube.com/shorts/WZfMbUllX1U