ARDUINO 用RGB LED 做簡單調色盤

RGB LED 介紹

可以想像成有紅色(R) 綠色(G) 藍色(B)三色的LED共用一個陰極(-)。

使用 PWM(pulse width modulation)技術調出想要的顏色。

接線圖
X1 Arduino Uno R3
X1 Common cathode RGB LED

X3 220 Ω 電阻

Arduino Code

int red=6;

int green=3;

int blue=5;

void setup()

{

pinMode(red,OUTPUT);

pinMode(green,OUTPUT);

pinMode(blue,OUTPUT);  

}

void loop()

{

digitalWrite(red,HIGH);

digitalWrite(green,LOW);

digitalWrite(blue,LOW);

delay(1000);

digitalWrite(red,LOW);

digitalWrite(green,HIGH);

digitalWrite(blue,LOW);

delay(1000);

digitalWrite(red,LOW);

digitalWrite(green,LOW);

digitalWrite(blue,HIGH);

delay(1000);

digitalWrite(red,HIGH);

digitalWrite(green,HIGH);

digitalWrite(blue,LOW);

delay(1000);

 

digitalWrite(red,HIGH);

digitalWrite(green,LOW);

digitalWrite(blue,HIGH);

delay(1000);

digitalWrite(red,LOW);

digitalWrite(green,HIGH);

digitalWrite(blue,HIGH);

delay(1000);

 

digitalWrite(red,HIGH);

digitalWrite(green,HIGH);

digitalWrite(blue,HIGH);

delay(1000);

}