Tangible User Interfaces - Fall 2011

Description

 

3 pots used to control 3 LEDs (blue, green, and red), the ultimate color mixer, where the color shown on the pyramid diffuser is the product of controlling the specific LED/RGB brightness.

 

Components Used

 

3 10k Potentiometers

3 LEDs (Red, Green, Blue)

220 ohm resistors 

Pyramid diffuser 

 

Arduino Code

/*

* 3 pots act as controllers for brightness of LED with pyramid diffuser 

* modified version of 

* http://www.arduino.cc/en/Tutorial/AnalogInput

* and brightness controls of

* http://arduino.cc/en/Tutorial/Dimmer 

* by Andrea Hsieh September 20, 2011

*/

 

// Analog input (potentiometers)

 

int potBlue = A0;   

int potGreen = A1;   

int potRed = A2;   

 

// Digital pin (LEDs)

 

int ledBlue = 11;   // blue

int ledGreen = 10;   // green

int ledRed = 9;   // red

 

// Variable values

 

int valBlue = 0;      // variable to store the value coming from the sensor

int valRed = 0;      

int valGreen = 0;      

 

 

void setup() {

 

  pinMode(ledBlue, OUTPUT);

  pinMode(ledGreen, OUTPUT);

  pinMode(ledRed, OUTPUT);

  

}

 

void loop()

{

 

  valBlue = analogRead(potBlue);  // read input pins, convert to 0-255 scale

  valGreen = analogRead(potGreen); 

  valRed = analogRead(potRed) ;

 

  analogWrite(ledBlue, valBlue/4); // analogWrite can be between 0-255

  analogWrite(ledGreen, valGreen/4); // analogWrite can be between 0-255

  analogWrite(ledRed, valRed/4); // analogWrite can be between 0-255  

 

}