Interfacing RGB LED with three potentiometer

 Interfacing RGB LED with Arduino using three potentiometer / Controlling RGB LED colors using three potentiometers

Note: Here Common Anode RGB LED is used. Please use only PWM pins of Arduino (pin 3,5,6,9,10,11) to connect LED.

Working Video:

Arduino Code:

#include <Wire.h> 

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2); //LCD address  0x27  

int redPin= 3;

int greenPin = 5;

int  bluePin = 6;

void setup() 

{

  lcd.init();    // initialize the lcd 

  lcd.backlight();  // lcd backlight ON

  lcd.setCursor(0,0);  // 0 row, 0 column

  //Defining the pins as OUTPUT/ INPUT

  pinMode(redPin,  OUTPUT);              

  pinMode(greenPin, OUTPUT);

  pinMode(bluePin, OUTPUT);

  pinMode(A0,INPUT);

  pinMode(A1,INPUT);

  pinMode(A2,INPUT);

}

void  loop() 

{

  int r = analogRead(A0);

  r=map(r,0,1018,255,0);

  int g = analogRead(A1);

  g=map(g,0,1018,255,0);

  int b = analogRead(A2);

  b=map(b,0,1018,255,0);

  lcd.clear();

  lcd.print("R=");  lcd.print(r); lcd.print(",");

  lcd.print("G=");  lcd.print(g); lcd.print(",");

  lcd.print("B=");  lcd.print(b);

  delay(100);

  setColor(r, g, b);

}

void setColor(int redValue, int greenValue,  int blueValue) 

{

  analogWrite(redPin, 255-redValue);

  analogWrite(greenPin,  255-greenValue);

  analogWrite(bluePin, 255-blueValue);

}