Description

I used 3 potentiometers to light three LED lights. Each potentiometer controls the brightness of one LED light.

Components

• 1 Arduino
• 3 LEDs
• 3 Resistors (220Ω)
• 3 Potentiometers
• 1 Breadboard

Code

// select the input pin for the potentiometer
int sensorPinRed = A0;    
int sensorPinGreen = A1;    
int sensorPinBlue = A2;
// select the pin for the LEDs
int redPin = 9;      
int greenPin = 10;
int bluePin = 11;
// variable to store the value coming from the sensor
int sensorValueRed = 0;
int sensorValueGreen = 0;
int sensorValueBlue = 0;

void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // read the value from the sensor:
  sensorValueRed = analogRead(sensorPinRed);
  sensorValueGreen = analogRead(sensorPinGreen);
  sensorValueBlue = analogRead(sensorPinBlue);
  
  // turn the Pins on
  analogWrite(redPin, sensorValueRed/4);
  analogWrite(greenPin, sensorValueGreen/4);
  analogWrite(bluePin, sensorValueBlue/4);

  // stop the program for 10 milliseconds:
  delay(10);
}