[Description]

- Finding a good diffuser: Film case & Parchment Paper

- Control colors of LEDs by both

  a) multiple key presses, and

  b) color names (yellow, orange and purple) - optional

 

[Components]

 - LED x 3 (R, G, B) 

- Resistor X 3 (stripes: red-red-brown-gold)

- White film case

- Parchment paper

 

[Adurino Code] 

 /* Enhanced RGB LEDs */

char inputString[100];

char c;

char color;

int value[3] = {0, 0, 0};

int pin[3] = {9, 10, 11};

void setup() {

  pinMode(pin[0], OUTPUT); // Red

  pinMode(pin[1], OUTPUT); // Green 

  pinMode(pin[2], OUTPUT); // Blue

  Serial.begin(9600);

  analogWrite(pin[0], 250);

  analogWrite(pin[1], 20);

  analogWrite(pin[2], 50);

  Serial.println("enter color info:  r, g, b, yellow, orange or purple"); 

}

void loop () {

  readInputString(inputString);   

  c = inputString[0];

  int i=0, j=0;

  if ( c == 'r' || c == 'g' || c == 'b' ) { // *** [homework No. 2] ***  

    while (i < 100 && inputString[i] != '\0') {

        color = inputString[i];

        switch (color) {

          case 'r': j=0; break;

          case 'g': j=1; break;

          case 'b': j=2; break;

        }

        value[j] = (value[j] + 10) % 255;

        analogWrite(pin[j], value[j]);

        Serial.print("setting color ");

        Serial.print(color);

        Serial.print(" to ");

        Serial.println(value[j]);      

        i++;

    }

  }

  else if (c>='a' && c<='z') { // *** [homework No. 3] ***

    if (!strcmp(inputString, "yellow")) {

      analogWrite(pin[0], 255);

      analogWrite(pin[1], 255);

      analogWrite(pin[2], 0);

    }

    else if(!strcmp(inputString, "orange")) {

      analogWrite(pin[0], 180);

      analogWrite(pin[1], 127);

      analogWrite(pin[2], 0);

    }

    else if(!strcmp(inputString, "purple")) {

      analogWrite(pin[0], 255);

      analogWrite(pin[1], 0);

      analogWrite(pin[2], 255);

    }

      Serial.print("Setting color to ");

      Serial.print(inputString);

      Serial.println();   

  }

  int k;

  for (k=0;k<10;k++) {

    inputString[k] = 0; // initialize all strings

  }

  delay(100);

} 

void readInputString (char *strArray) {

  int i = 0;

  if(!Serial.available()) {

    return;

  }

  while (Serial.available()) {

    strArray[i] = Serial.read();

    i++;

  }

}

 

[Images]