KY-029 Dual Color LED Module

The KY-029 Dual Color LED module emits red and green light. You can adjust the intensity of each color using PWM.

Compatible with many electronics platforms like Arduino, Raspberry Pi, ESP32 and others. This module is similar to the KY-011.

KY-029 Specifications

This module consists of a common cathode 5mm red/green LED, a 0Ω resistor and 3 male pin headers. Use this module with limiting resistors to prevent burnout of the LED when working for long periods of time.

Operating Voltage	2.3-2.6V for green, 1.9-2.2V for red
Working Current	20mA
Diameter	5mm
Package Type	Diffusion
Color	Red + Green
Wavelength	571nm + 625nm
Luminous Intensity	20~40mcd, 60~80mcd

Connection Diagram

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

KY-029	Breadboard	Arduino
–		GND
middle	330Ω resistor	Pin 11
S	330Ω resistor	Pin 10

Arduino KY-029 Dual color LED connection diagram

KY-029 Arduino Code

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); 
}