The Architecture Run CPH 2011 - Arduino touch mp3trigger

mp3trigger.pde

// Johan Bichel Lindegaard 2011 http://johan.cc
// mp3trigger controller, 3 analog inputs controls 3 digital outputs


const int MP3TRIGGERPINS[] = {4,7,8}; // digital output pins for our 
const int SENSORPINS[] = {A3,A4,A5};
const int THRESHOLDS[] = {100,100,100};  // threshold values to decide when the detected value is someone stepping on the sensor
const int TIMEOUTS[] = {1000,1000,1000}; // how long to wait for mp3triggers to finish playing their tracks

// these variables will change:
int sensorReadings[] = {0,0,0};      // variable to store the value read from the sensor pin
unsigned long lastPlayed[] = {0,0,0};


int i = 0;

void setup() {
  for (i=0;i<3;i++) {
    pinMode(MP3TRIGGERPINS[i], OUTPUT);
    digitalWrite(MP3TRIGGERPINS[i], HIGH);
  }
  
  //Serial.begin(9600);       // use the serial port
}


void loop() {
  // read the sensors and store values in the array sensorReadings:
  
  for (i=0;i<3;i++) {
    sensorReadings[i] = analogRead(SENSORPINS[i]);
    
    if ((millis() - lastPlayed[i]) > TIMEOUTS[i]) {
      digitalWrite(MP3TRIGGERPINS[i], HIGH);
      
      if (sensorReadings[i] >= THRESHOLDS[i]) {
        lastPlayed[i] = millis();
        digitalWrite(MP3TRIGGERPINS[i], LOW);
      }
    }
    
    /*
    Serial.print("sensor ");
    Serial.print(i);
    Serial.print(" reads ");
    Serial.print(sensorReadings[i]);   
    Serial.println("-");
    */
    
  } 
}