ezo e RGB

[sketchbook_andrea] / piezo / piezo_1_tonePitchFollower / piezo_1_tonePitchFollower_ino / piezo_1_tonePitchFollower_ino.ino

diff --git a/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower_ino/piezo_1_tonePitchFollower_ino.ino b/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower_ino/piezo_1_tonePitchFollower_ino.ino
new file mode 100644 (file)
index 0000000..b5e9d24
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+++ b/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower_ino/piezo_1_tonePitchFollower_ino.ino
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+/*
+Pitch following
+
+The input from a photo resistor dictates the pitch of a piezo.
+
+ 
+ */
+
+// These constants won't change:
+const int sensorPin = A0;    // pin that the sensor is attached to
+const int ledPin = 9;        // pin that the LED is attached to
+int thisPitch ;
+
+// calibration variables:
+int sensorValue = 0;         // the sensor value
+int sensorMin = 1023;        // minimum sensor value
+int sensorMax = 0;           // maximum sensor value
+
+
+void setup() {
+  // turn on LED to signal the start of the calibration period:
+  pinMode(13, OUTPUT);
+  digitalWrite(13, HIGH);
+
+  // calibrate during the first five seconds 
+  while (millis() < 5000) {
+    sensorValue = analogRead(sensorPin);
+
+    // record the maximum sensor value
+    if (sensorValue > sensorMax) {
+      sensorMax = sensorValue;
+    }
+
+    // record the minimum sensor value
+    if (sensorValue < sensorMin) {
+      sensorMin = sensorValue;
+    }
+  }
+
+  // signal the end of the calibration period
+  digitalWrite(13, LOW);
+}
+
+void loop() {
+  // read the sensor:
+  sensorValue = analogRead(sensorPin);
+
+  // apply the calibration to the sensor reading
+  thisPitch = map(sensorValue, sensorMin, sensorMax, 120, 1500);
+  // map the analog input range (in this case, min - max from the photoresistor)
+  // to the output pitch range (120 - 1500Hz)
+  // change the minimum and maximum input numbers below
+  // depending on the range your sensor's giving:
+  
+  // in case the sensor value is outside the range seen during calibration
+  thisPitch = constrain(sensorValue, 120, 1500);
+
+
+  
+  // play the pitch:
+  tone(ledPin, thisPitch, 10); // Tone is built in function
+  delay(1);        // delay in between notes
+}
+