Renumbered examples

build/shared/examples/02.Digital/toneKeyboard/toneKeyboard.ino

@@ -0,0 +1,45 @@
+/*
+  keyboard
+ 
+ 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
+ 
+ created 21 Jan 2010
+ modified 30 Aug 2011
+ by Tom Igoe 
+
+This example code is in the public domain.
+ 
+ http://arduino.cc/en/Tutorial/Tone3
+ 
+ */
+
+#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();
+}