Arduino RGB Mixer with single Potentiometer

Hi there I wish you happy new year 2011 ! Today I will show you my first Arduino project. It’s RGB Mixer.

Parts you’ll need :

Arduino (I’ve used Duemilanove, but you can use different type)

Breadboard

1x 1W RGB diode

3x 100 ohm resistor

2x 1K resistor

1x Potentiometer (I’ve used 2k2)

1x Momentary switch

Few jumpers

When you upload sketch into Arduino, you can now adjust brightness of LED’s with Potentiometer and browse between LED’s with switch

How to connect :

Red LED > digital pin 9 (and through 100 ohm resistor to ground)

Green LED > digital pin 10 (and through 100 ohm resistor to ground)

Blue LED > digital pin 11 (and through 100 ohm resistor to ground)

Switch > connect one side to 5V and second side through 1K resistor to ground and through another 1K resistor to digital pin 2

Potentiometer > analog pin  0

Here’s the Code :

int brightness = 0;
int potPin = A0;
int switchPin = 2;
int blue = 11;
int green = 10;
int red = 9;
int val;                       
int val2;                    
int switchValue;              
int mode = 0;

void setup() {
 
  pinMode(blue, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(switchPin, INPUT);
 
  switchValue = digitalRead(switchPin);
   
}

void loop() {
   val = digitalRead(switchPin);     
  delay(10);                        
  val2 = digitalRead(switchPin);    
  if (val == val2) {                
    if (val != switchValue) {         
      if (val == LOW) {              
        if (mode == 0) {         
          mode = 1;             
        } else {
          if (mode == 1) {      
            mode = 2;                    
            } else {
            if (mode == 2) {
                mode = 0;         
              }
   }
          }
        }
      }
    }
    switchValue = val;              
 
  brightness = analogRead(potPin);
  if (mode == 0) {
  analogWrite(red, brightness / 4);  
   }
  
  if (mode == 1) {
  analogWrite(green, brightness / 4);  
   }
  
  if (mode == 2) {
  analogWrite(blue, brightness / 4);  
   }
  
}   

 Here you can see some pictures and video.