Arduino Tutorial 12 - RGB Light Dimmer

zoeyyy Dec 27.2024

0 27 Easy

In Project[RGB LED], we learned about how to adjust an RBG LED to various colors. This time we will try to make it interactive by adding 3 potentiometers so you can choose any color you want for your lighting at home.

COMPONENT LIST

HARDWARE

fig 1 RGB Light Dimmer Circuit

CODE

Sample code:

CODE

// Project - RGB Light Dimmer  
int redPin = 9;                // R - digital pin 9  
int greenPin = 10;             // G - digital pin 10  
int bluePin = 11;              // B - digital pin 11  
int potRedPin = 0;             // Potentiometer 1 - analog pin 0  
int potGreenPin = 1;           // Potentiometer 2 - analog pin 1  
int potBluePin = 2;            // Potentiometer 3 - analog pin 2  
  
void setup(){  
   pinMode(redPin, OUTPUT);  
   pinMode(greenPin, OUTPUT);  
   pinMode(bluePin, OUTPUT);  
   Serial.begin(9600);         // Initialize serial communication  
}  
  
void loop(){  
   int potRed = analogRead(potRedPin);     
// potRed stores the value read from analog pin 0  
   int potGreen = analogRead(potGreenPin); 
// potGreen stores the value read from analog pin 1  
   int potBlue = analogRead(potBluePin);  
// potBlue stores the value read from analog pin 2  
     
   int val1 = map(potRed, 0, 1023, 0, 255);     
// Convert potRed value to 0-255 range using map function  
   int val2 = map(potGreen, 0, 1023, 0, 255);  
   int val3 = map(potBlue, 0, 1023, 0, 255);  
     
   // Print Red, Green, Blue values to serial monitor  
   Serial.print("Red:");                    
   Serial.print(val1);  
   Serial.print("Green:");  
   Serial.print(val2);  
   Serial.print("Blue:");  
   Serial.println(val3);  
     
   colorRGB(val1, val2, val3);      
// Display corresponding color on RGB LED  
}  
  
// Function to display a color  
void colorRGB(int red, int green, int blue){       
   analogWrite(redPin, constrain(red, 0, 255));  
// Adjust red intensity using PWM  
   analogWrite(greenPin, constrain(green, 0, 255)); 
// Adjust green intensity using PWM  
   analogWrite(bluePin, constrain(blue, 0, 255)); 
// Adjust blue intensity using PWM  
}

After uploading the sketch, you can change different combinations of red, green and blue colors on the RGB LED.