KY-029 Dual Color LED Module

5mm dual color LED module KY-029 for Arduino, emits red and green light. You can adjust the amount of each color using PWM. This module is similar to KY-011.

This module consists of a  common cathode 5mm red/green LED and a 0Ω resistor. Use this module with some limiting resistors to prevent burnout of the LED when working for long periods of time.

We'll use a couple of 330Ω resistors to limit the current from the Arduino and prevent burning the LED.

The following Arduino sketch will gradually alternate between red and green color.

int redpin = 11;  // pin for the red LED
int greenpin = 10;// pin for the green LED
int val;

void setup() 
{
  pinMode(redpin, OUTPUT);
  pinMode(greenpin, OUTPUT);
  Serial.begin(9600);
}

void loop() 
{
  for(val = 255; val > 0; val--)
  {
    analogWrite(redpin, val);
    analogWrite(greenpin, 255 - val);
    delay(10);
  }
  Serial.println("Green");
  delay(1000);
  
  for(val = 0; val < 255; val++)
  {
    analogWrite(redpin, val);
    analogWrite(greenpin, 255 - val);
    delay(10); 
  }
  Serial.println("Red");
  delay(1000); 
}

• Fritzing Part: KY-029 Dual color LED module.