fone

light-theremin

@@ -0,0 +1,44 @@
+
+// variable to hold sensor value
+int sensorValue;
+// variable to calibrate low value
+int sensorLow = 1023;
+// variable to calibrate high value
+int sensorHigh = 0;
+// LED pin
+const int ledPin = 13;
+
+void setup() {
+  // Make the LED pin an output and turn it on
+  pinMode(ledPin, OUTPUT);
+  digitalWrite(ledPin, HIGH);
+
+  // calibrate for the first five seconds after program runs
+  while (millis() < 5000) {
+    // record the maximum sensor value
+    sensorValue = analogRead(A0);
+    if (sensorValue > sensorHigh) {
+      sensorHigh = sensorValue;
+    }
+    // record the minimum sensor value
+    if (sensorValue < sensorLow) {
+      sensorLow = sensorValue;
+    }
+  }
+  // turn the LED off, signaling the end of the calibration period
+  digitalWrite(ledPin, LOW);
+}
+
+void loop() {
+  //read the input from A0 and store it in a variable
+  sensorValue = analogRead(A0);
+
+  // map the sensor values to a wide range of pitches
+  int pitch = map(sensorValue, sensorLow, sensorHigh, 50, 4000);
+
+  // play the tone for 20 ms on pin 8
+  tone(8, pitch, 20);
+
+  // wait for a moment
+  delay(10);
+}