LED Port

This example is for Wiring version 0027+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.

keyboard by Tom Igoe

Plays a pitch that changes based on a changing analog input circuit: 3 force-sensing resistors from +5V to analog in 0 through 5 3 10K resistors from analog in 0 through 5 to ground 8-ohm speaker on digital pin 8


#include "pitches.h"

const int threshold = 10;    // minimum reading of the sensors that generates a note

// notes to play, corresponding to the 3 sensors:
int notes[] = {
  NOTE_A4, NOTE_B4,NOTE_C3
};

void setup() {
}

void loop() {
  for (int thisSensor = 0; thisSensor < 3; thisSensor++) {
    // get a sensor reading:
    int sensorReading = analogRead(thisSensor);

    // if the sensor is pressed hard enough:
    if (sensorReading > threshold) {
      // play the note corresponding to this sensor:
      tone(8, notes[thisSensor], 20);
    }
  }
  Serial.println();
}