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.

Connection Diagram

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

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); 
}

❓ Frequently Asked Questions (FAQ)

1. What is the KY-029 Dual Color LED Module?

The KY-029 is a bi-color LED module that contains a red and green LED in one package. By adjusting the current or signal, you can light up either color or create a mix.

2. How does the KY-029 module work?

The module has three pins: one for each color (red and green) and a common cathode. Controlling the signal to the red or green pin will illuminate the respective color.

3. Where can I buy the KY-029 Dual Color LED Module in Sri Lanka?

You can purchase the KY-029 module from online electronics stores like Thingerbits, TechKatha, or Daraz.lk, as well as local Arduino component shops.

4. Is KY-029 compatible with Arduino boards?

Yes, KY-029 is fully compatible with Arduino Uno, Mega, Nano, and other development boards commonly used in Sri Lanka.

5. What are the typical uses of the KY-029 module?

The module is commonly used in visual indicators, status lights, signal systems, DIY LED displays, and creative lighting projects.

6. How do I connect KY-029 to an Arduino?

Connect the common cathode pin to GND, and the red and green LED pins to two Arduino digital pins. Use simple digitalWrite() or analogWrite() functions to control brightness and color.

7. Can I create different colors with KY-029?

While it only contains red and green LEDs, you can create yellow-like blends by lighting both LEDs simultaneously using PWM (Pulse Width Modulation).

8. Does KY-029 require resistors?

Yes, it’s recommended to use current-limiting resistors (220Ω–330Ω) with each LED to prevent damage.

9. What is the voltage requirement for KY-029?

The module typically runs on 5V DC, making it perfect for direct connection to most microcontrollers used in Sri Lanka.

10. Is the KY-029 suitable for school or university projects?

Absolutely! KY-029 is beginner-friendly and often used in Sri Lankan school and university electronics or Arduino projects.

11. What’s the price of KY-029 Dual Color LED Module in Sri Lanka?

The price usually ranges between LKR 150 to LKR 300, depending on the supplier and location.

12. Does KY-029 come with a datasheet or documentation?

Most online stores in Sri Lanka provide a basic pinout or guide. Full datasheets can be found on global electronics websites.