Tangible User Interfaces - Fall 2011

Description:

Pyramid color is controlled by entering a number from 1 to 7 on the keyboard. The colors were chosen based on the RBG (CMY) color model. 

 

Diffuser Materials: 

Styrofoam block

 

Vellum lining

 

Frosted plastic

 

 

Arduino Code:

*/

* Serial RGB/CMYK LED Color Mixer

 * ---------------

 * Serial commands control the brightness of R,G,B LEDs

 *

 * User enters a number to see one of seven colors, based on the primary colors of light. 

 * E.g. '1' sets the LEDs to red (255,0,0).  

 *      '2' sets the LEDs to yellow (255,255,0).

 *      '3' sets the LEDs to green (0,255,0).

 *      '4' sets the LEDs to cyan (0,255,255).

 *      '5' sets the LEDs to blue (0,0,255).

 *      '6' sets the LEDS to magenta (255,0,255)

 *      '7' sets all LEDS on (255,255,255) .

 *

 * Created on 13 September 2011 by Andrea Hsieh

 * 

 */

 

char serInString[100];  // array that will hold the different bytes of the string. 100=100characters;

                        // -> you must state how long the array will be else it won't work properly

int keynumber;      // define number

 

int redPin   = 9;   // Red LED,   connected to digital pin 9

int greenPin = 10;  // Green LED, connected to digital pin 10

int bluePin  = 11;  // Blue LED,  connected to digital pin 11

 

void setup() {

  pinMode(redPin,   OUTPUT);   // sets the pins as output

  pinMode(greenPin, OUTPUT);   

  pinMode(bluePin,  OUTPUT);

  Serial.begin(9600);

  analogWrite(redPin,   0);   // set them all to off

  analogWrite(greenPin, 0);   // set them all to off

  analogWrite(bluePin,  0);   // set them all to off

  Serial.println(" Enter a number from 1-7: ");

 

}

 

void loop () {

  // clear the string

  memset(serInString, 0, 100);

  //read the serial port and create a string out of what you read

  readSerialString(serInString);

    

  keynumber = serInString[0]; 

  if( keynumber == '1' || keynumber == '2' || keynumber == '3' || keynumber == '4' || keynumber == '5' || keynumber == '6' || keynumber == '7') {

    Serial.print("setting color to ");

    if(keynumber == '1')

      Serial.print("Red");

    else if(keynumber == '2')

      Serial.print("Yellow");

    else if(keynumber == '3')

      Serial.print("Green");

    else if(keynumber == '4')

      Serial.print("Cyan");

    else if(keynumber == '5')

      Serial.print("Blue");

    else if(keynumber == '6')

      Serial.print("Magenta");

    else if(keynumber == '7')

      Serial.print("All");

    Serial.println();

    serInString[0] = 0;                   // indicates we've used this string

    if(keynumber == '1') {

      analogWrite(redPin, 255);

      analogWrite(greenPin, 0);

      analogWrite(bluePin, 0);

      // red color

    }

    else if(keynumber == '2') { 

      analogWrite(redPin, 255);

      analogWrite(greenPin, 50);

      analogWrite(bluePin, 0);

      // yellow color (green LED altered to appear "more yellow")

    }

    else if(keynumber == '3') {

      analogWrite(redPin, 0);

      analogWrite(greenPin, 255);

      analogWrite(bluePin, 0);

      // green color

    }

    else if(keynumber == '4') {

      analogWrite(redPin, 0);

      analogWrite(greenPin, 255);

      analogWrite(bluePin, 255);

      // cyan color

    }

    else if(keynumber == '5') {

      analogWrite(redPin, 0);

      analogWrite(greenPin, 0);

      analogWrite(bluePin, 255);

      // blue color

    }

    else if(keynumber == '6') {

      analogWrite(redPin, 255);

      analogWrite(greenPin, 0);

      analogWrite(bluePin, 50);

      // magenta color

    }

    else if(keynumber == '7') {

      analogWrite(redPin, 255);

      analogWrite(greenPin, 255);

      analogWrite(bluePin, 255);

      // all color

    }

  }

 

  delay(100);  // wait a bit, for serial data

}

 

//read a string from the serial and store it in an array

//you must supply the array variable

void readSerialString (char *strArray) {

  int i = 0;

  if(!Serial.available()) {

    return;

  }

  while (Serial.available()) {

    strArray[i] = Serial.read();

    i++;

  }

}