Piezo and Arduino help

Forum 2005-2010 (read only) Hardware Interfacing
1

I am trying to run the coding below but have it so that when the sensor is hit a second time it runs a differet blink pattern. If touched once it blinks 5 or so times if touched a second time it blinks 6 times and so on. This is as far as i got and I'm clueless on how to proceed.

2

Here is the code...

/*
 * Touch Sensor

 LED lights up and writes "touch" when a sensor is hit

 The circuit:
 *LED connected from digital pin 13 to ground.
 *Piezo connected from analog pin 0 to ground.

 */

#define PIEZOTHRESHOLD 20  // analog threshold for impact
#define PADNUM 1          // number of pads

int ledPin = 13;       // LED connected to digital 13
int sensorPin = 14;    // Sensor connected to analog pin 0
int val = 20;

// The setup() method runs once, when the sketch starts

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(sensorPin, INPUT);
  Serial.begin(115200);   // sets serial output rate
}

// the loop() method runs continuously

void loop()
{
  // Loop through each sensor and begin blink pattern
  // on digital output if impact exceeds
  // the threshold
  for(int i = 0; i < 1; i++) {
    val = analogRead(i);
    if(val > 20 ){
      digitalWrite(ledPin, HIGH); // turns on LED
      Serial.print(i);
      Serial.print(",");
      Serial.print("touch");
      Serial.println();
      digitalWrite(ledPin, LOW);  // turns off LED
      digitalWrite(ledPin, HIGH);
      delay(200);
      digitalWrite(ledPin, LOW);
      delay(200);
      digitalWrite(ledPin, HIGH);
      delay(200);
      digitalWrite(ledPin, LOW);
      delay(200);
      digitalWrite(ledPin, HIGH);
      delay(200);
      digitalWrite(ledPin, LOW);
      delay(200);
      digitalWrite(ledPin, HIGH);
      delay(200);
      digitalWrite(ledPin, LOW);
      delay(200);
      digitalWrite(ledPin, HIGH);
      delay(200);
      digitalWrite(ledPin, LOW);
      delay(200);
      break;
    }
  }
}