W13-Project3-Sound Balls

Final result

You may find a longer demo featuring a Beatles song here.

p5

Screen Shot 2020-12-10 at 8.18.08 PM.png

Here is the p5 sketch code.

Arduino

const int fanPinW = 10;    // connected to the base of the transistor
const int fanPinG = 9;    // connected to the base of the transistor
const int fanPinO = 6;    // connected to the base of the transistor
const int fanPinY = 5;    // connected to the base of the transistor


void setup() {
  // set  the transistor pin as output:
  pinMode(fanPinW, OUTPUT);
  pinMode(fanPinG, OUTPUT);
  pinMode(fanPinO, OUTPUT);
  pinMode(fanPinY, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  if (Serial.available()) {
    String fromSerial = Serial.readStringUntil('\n');               // read until you see a \n

    //First Value
    int firstValueEnd = fromSerial.indexOf(',');                    // find the first comma and tell me how deep into the string it is
    String firstValueString = fromSerial.substring(0, firstValueEnd); // give me a new string that includes everything till the first comma
    int firstValue = firstValueString.toInt();                      // give me the int interpretation of that string
    float outputValue1 = map(firstValue, 0, 500, 0, 255);
    analogWrite(fanPinW, outputValue1);


    //Second Value
    int secondValueEnd = fromSerial.indexOf(',', firstValueEnd + 1);                  // search for the second comma, start searching after the first one
    String secondValueString = fromSerial.substring(firstValueEnd + 1, secondValueEnd); //give me a new string with everything beween first and second comma
    int secondValue = secondValueString.toInt();                                      // give me the int interpretation of that string
    float outputValue2 = map(secondValue, 0, 500, 0, 255);
    analogWrite(fanPinG, outputValue2);

    //Third Value
    int thirdValueEnd = fromSerial.indexOf(',', secondValueEnd + 1);
    String thirdValueString = fromSerial.substring(secondValueEnd + 1, thirdValueEnd);
    int thirdValue = thirdValueString.toInt();
    float outputValue3 = map(thirdValue, 0, 500, 0, 255);
    analogWrite(fanPinO, outputValue3);

    //Forth Value
    int forthValueEnd = fromSerial.indexOf(',', thirdValueEnd + 1);
    String forthValueString = fromSerial.substring(thirdValueEnd + 1, forthValueEnd);
    int forthValue = forthValueString.toInt();
    float outputValue4 = map(forthValue, 0, 500, 0, 255);
    analogWrite(fanPinY, outputValue4);
  }
}