아두이노 3색 RGB LED

아두이노 3색 RGB LED

2021. 8. 2. 10:51ㆍ아두이노

3색 RGB LED는 한개의 단자안에서 R,G,B색의 비율을 조절해서 다양한 색을 표현 할 수 있는 LED입니다.

출처:https://studyingandsuccess.tistory.com/27

3색 RGB 단자는 R,G,B 핀과 1개의 공통 단자로 이루어져있습니다.

공통단자가 (-) 이면 Common Cathode, (+)이면 Common Anode라고 합니다.

단자의 외견만 봐서는 Cathode인지 Anode인지 판단 할 수가 없습니다. (구매하실 때 꼭 확인.....but 대부분은 Cathode, 우리도 Cathode)

그림에서 보듯이 가장 긴 핀이 공통단자입니다. 공통단자를 기준으로 2개 있는 쪽이 G,B 1개있는쪽이 R입니다.

실습 1 : 2초마다 빨강,초록,파랑색이 켜지도록 해보세요.

(저항을 공통단자쪽에 설치하면 1개로도 충분합니다.)

int red=13;
int green=12;
int blue=11;

void setup() {
 pinMode(red,OUTPUT);
 pinMode(green,OUTPUT);
 pinMode(blue,OUTPUT);

}

void loop() {
  digitalWrite(red, HIGH);
  digitalWrite(green, LOW);
  digitalWrite(blue, LOW);
  delay(2000);
  digitalWrite(red, LOW);
  digitalWrite(green, HIGH);
  digitalWrite(blue, LOW);
  delay(2000);
  digitalWrite(red, LOW);
  digitalWrite(green, LOW);
  digitalWrite(blue, HIGH);
  delay(2000);
}

문제1 : analogWrite()를 이용해서 여러가지 색을 만들어보세요.

(http://www.n2n.pe.kr/lev-1/color.htm) 참고 또는 구글에 rgb 표 검색

아두이노에서는 14개의 디지털 핀중 6개(3,5,6,9,10,11)를 PWM 신호로 사용할 수 있습니다.

위의 회로도에서 rgb핀만 바꿔서 만들어보세요.

(BeautifulSoup를 통해 rgb표값을 배열로 얻었습니다. 여러분도 BeautifulSoup를 통해 직접 배열을 얻어보세요.)

int redColors[]={000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,255,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255};
int greenColors[]={000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,204,255,000,051,102,153,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,204,255,000,051,102,153,153,204,255,000,051,102,102,153,204,255,000,051,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,153,204,255,000,051,102,102,153,204,255,000,051,153,204,255,000,051,102,153,204,255,000,051,102,102,153,204,255,000,051,102,153,204,255,000,051};
int blueColors[]={000,051,102,153,204,255,051,000,000,000,000,000,102,102,051,051,051,051,153,153,153,102,102,102,204,204,204,204,153,153,255,255,255,255,255,204,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,204,255,000,051,102,153,255,000,051,102,153,204,204,255,000,051,102,153,153,204,255,000,051,102,102,153,204,255,000,051,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,204,255,000,051,102,153,255,255,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,051,102,153,204,255,000,051,102,153,204,255,000,102,153,204,255,000,051,204,255,000,051,102,153,204,255,000,051,102,153,153,204,255,000,051,102};

int red=11;
int green=10;
int blue=9;


int redColors[]={000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,255,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255};
int greenColors[]={000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,204,255,000,051,102,153,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,204,255,000,051,102,153,153,204,255,000,051,102,102,153,204,255,000,051,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,153,204,255,000,051,102,102,153,204,255,000,051,153,204,255,000,051,102,153,204,255,000,051,102,102,153,204,255,000,051,102,153,204,255,000,051};
int blueColors[]={000,051,102,153,204,255,051,000,000,000,000,000,102,102,051,051,051,051,153,153,153,102,102,102,204,204,204,204,153,153,255,255,255,255,255,204,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,204,255,000,051,102,153,255,000,051,102,153,204,204,255,000,051,102,153,153,204,255,000,051,102,102,153,204,255,000,051,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,204,255,000,051,102,153,255,255,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,255,000,051,102,153,204,051,102,153,204,255,000,102,153,204,255,000,051,153,204,255,000,051,102,051,102,153,204,255,000,051,102,153,204,255,000,102,153,204,255,000,051,204,255,000,051,102,153,204,255,000,051,102,153,153,204,255,000,051,102};

void setup() {
 pinMode(red,OUTPUT);
 pinMode(green,OUTPUT);
 pinMode(blue,OUTPUT);

}

void loop() {
  for(int i=0; i<sizeof(redColors)/sizeof(redColors[0]) ; i++){
    analogWrite(red,redColors[i]);  
    analogWrite(green,greenColors[i]);  
    analogWrite(blue,blueColors[i]); 
    delay(500); 
  }
  
  
}

(이론상으론 모든색이 나와야하지만 3색rgb 내의 각 색상의 위치때문에 생각보다 많은 색이 보이지않습니다. 보는 위치에 따라 색이 다를 수 있으니 앞뒤옆면에서 살펴봅시다.)

실습 2 : 스위치를 누를 때마다 색이 r,g,b 색이 나오도록 해보세요

int btn=5;    
int red=13;
int green=12;
int blue=11;

boolean lastBtn=LOW;      
boolean currentBtn=LOW;   
#define DEBOUNCING_DELAY 5 



void setup() {
  // put your setup code here, to run once:
  pinMode(red,OUTPUT);
  pinMode(green,OUTPUT);
  pinMode(blue,OUTPUT);
  pinMode(btn,INPUT);
}


boolean buttonInputChattering(){
   boolean current=digitalRead(btn);
   if(current!=lastBtn){                 //현재읽은게 전상황이랑 다르면..... 
    delay(DEBOUNCING_DELAY);
    current=digitalRead(btn); //5ms 뒤 다시 읽음
   }
   return current;        //다시 읽은 입력상태 return 
}

void onlyOneLedOn(int led){
  if(led==red){
    digitalWrite(red,HIGH);
    digitalWrite(green,LOW);
    digitalWrite(blue,LOW);
  }else if(led==green){
     digitalWrite(red,LOW);
    digitalWrite(green,HIGH);
    digitalWrite(blue,LOW);
  }else if(led==blue){
     digitalWrite(red,LOW);
    digitalWrite(green,LOW);
    digitalWrite(blue,HIGH);
  }else if(led==0){
      digitalWrite(red,LOW);
    digitalWrite(green,LOW);
    digitalWrite(blue,LOW);
  }
}


int count=0;
void loop() {
  currentBtn=buttonInputChattering();     //현재 btn은 5ms 후의 읽은 값이 현재 버튼 상태
  if(currentBtn==HIGH && lastBtn==LOW){  // 전버튼은 low, 현재버튼 HIGH ==> 버튼 누른것으로 간주
      count++;
      switch (count%4){
        case 1 : onlyOneLedOn(red);break;
        case 2 : onlyOneLedOn(green);break;
        case 3 : onlyOneLedOn(blue);break;
        default :onlyOneLedOn(0);break;
      }
  }     
  lastBtn=currentBtn;                                
}

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