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Interface RGB LED with Arduino

Introduction

The KY-016 RGB module allows you to produce a variety of colors by mixing the red, green, and blue lights. It has built-in resistors for each color, making it easy to connect directly to the Arduino.

Required Components

  • Arduino UNO R3 SMD
  • KY-016 RGB LED module
  • Jumper wires
  • Breadboard (optional)

Pinout

Circuit Diagram / Wiring

  • RGB (GND) Arduino GND
  • RGB (RED) Arduino D9
  • RGB (GREEN) Arduino D10
  • RGB (BLUE) Arduino D11

Arduino Code / Programming

The following code shows how to control the KY-016 RGB module to produce different colors using the analogWrite() function.

int redPin = 9;    // Pin connected to the red LED
int greenPin = 10; // Pin connected to the green LED
int bluePin = 11;  // Pin connected to the blue LED

void setup() {
  // Set the RGB LED pins as outputs
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // Set the LED to red
  setColor(0, 255, 255); // Red ON, Green and Blue OFF
  delay(1000); // Wait for 1 second

  // Set the LED to green
  setColor(255, 0, 255); // Green ON, Red and Blue OFF
  delay(1000); // Wait for 1 second

  // Set the LED to blue
  setColor(255, 255, 0); // Blue ON, Red and Green OFF
  delay(1000); // Wait for 1 second

  // Set the LED to yellow
  setColor(0, 0, 255); // Red and Green ON, Blue OFF
  delay(1000); // Wait for 1 second

  // Set the LED to cyan
  setColor(255, 0, 0); // Green and Blue ON, Red OFF
  delay(1000); // Wait for 1 second

  // Set the LED to magenta
  setColor(0, 255, 0); // Red and Blue ON, Green OFF
  delay(1000); // Wait for 1 second

  // Turn off the LED
  setColor(255, 255, 255);
  delay(1000); // Wait for 1 second
}

// Function to set the color of the RGB LED
void setColor(int redValue, int greenValue, int blueValue) {
  analogWrite(redPin, redValue);
  analogWrite(greenPin, greenValue);
  analogWrite(bluePin, blueValue);
}

Explanation of the Code

  • Pin Definitions: The pins for the red, green, and blue LEDs are defined.
  • Setup Function: Sets the RGB LED pins as outputs.
  • Loop Function: Changes the color of the RGB LED by calling the setColor() function with different values.
  • setColor() Function: Uses the analogWrite() function to set the brightness of each LED.

Testing and Troubleshooting

  • Check Connections: Ensure the connections
  • Adjust Colors: You can fine-tune the RGB values in setColor() for different colors.

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