RGB Led 1W

接線圖

關鍵一:
Arduino Mini
腳位接到數位IO腳 3, 5, 6, 9, 10, 11 才能做輸出.. !!!
關鍵二:
此 RGB LED circuit 標示錯誤 - 負極..實際上要接 +正極,
R/G/B 接 Digital Pin, 共4線.. 不須接地線.

影片:

程式碼:

int R_ledPin = 9;

int G_ledPin = 10;

int B_ledPin = 11;

int ledPin = 13;



// val 255 = off

int R_val=254;

int G_val=254; 

int B_val=254;



void setup()

{ 

pinMode(ledPin, OUTPUT);



pinMode( R_ledPin, OUTPUT); 

pinMode( G_ledPin, OUTPUT); 

pinMode( B_ledPin, OUTPUT); 



Serial.begin ( 9600 );



analogWrite ( R_ledPin, R_val );

analogWrite ( G_ledPin, G_val );

analogWrite ( B_ledPin, B_val ); 



delay ( 1000 );

}

int dir=0;

int color = 0;

int offset = 5;

void loop() 

{

digitalWrite(ledPin, HIGH); 



switch ( color )

{

case 0: analogWrite ( R_ledPin, R_val ); break;

case 1: analogWrite ( G_ledPin, R_val ); break;

case 2: analogWrite ( B_ledPin, R_val ); break;

}



if ( dir == 0 )

{

if ( R_val - offset > 0 )

{

R_val -= offset;

}

else 

{

R_val = 0;

dir = 1; 

}

}



if ( dir == 1 )

{

if ( R_val + offset < 255 )

{ 

R_val += offset;

}

else 

{

R_val = 254;

dir = 0;



if ( color + 1 < 3 ) color ++;

else color = 0;

} 

}

//delay ( 300 );



clearLCD (); // 清除 LCD 畫面



// 輸出數值到 LCD

Serial.print ( "R= ");

Serial.print ( R_val, DEC );

Serial.print ( "\n");
}

// ===== clear the LCD =====

void clearLCD()
{
Serial.print(12, BYTE);

}