X-Git-Url: http://git.piffa.net/web?a=blobdiff_plain;f=piezo%2Fpiezo_1_tonePitchFollower%2Fpiezo_1_tonePitchFollower.ino;h=9ceda24d32cdabfc4475e6f7f51be22477f55990;hb=c3d28d0cbbe5e18d64e82b99f9cff169d1a6e018;hp=e74c7b343449a5c366c457ebb127c5887d99dcc4;hpb=54de1d245a98a8032e8c41089158321f6be58b1c;p=sketchbook_andrea

diff --git a/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower.ino b/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower.ino
index e74c7b3..9ceda24 100644
--- a/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower.ino
+++ b/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower.ino
@@ -19,6 +19,11 @@ This example code is in the public domain.
  */
 
 
+// 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
+
+
 void setup() {
   // initialize serial communications (for debugging only):
   Serial.begin(9600);
@@ -26,22 +31,106 @@ void setup() {
 
 void loop() {
   // read the sensor:
-  int sensorReading = analogRead(A0);
+  int sensorReading = analogRead(sensorPin);
   // print the sensor reading so you know its range
   Serial.println(sensorReading);
   // map the analog input range (in this case, 400 - 1000 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:
-  int thisPitch = map(sensorReading, 400, 1000, 120, 1500);
+  int thisPitch = map(sensorReading, sensorMin, sensorMax, 220, 3500);
 
   // play the pitch:
-  tone(9, thisPitch, 10);
+  tone(ledPin, thisPitch, 10);
   delay(1);        // delay in between reads for stability
 }
+
+/* Domande:
+1. Modificare l'estensione del range di frequenza del piezo
+tra i valori 20hz e 20.000hz.
+2. Inserire l'auto calibrazione
+3. Modificare lo script in modo che vengano emessi suoni solo quando
+una mano offusca leggermente la luce (il piezo non deve suonare
+se non c'e' un operatore a interagire con la fotoresistenza).
+
+Soluzioni in fondo.
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+
 
 
 
+
+Soluzioni:
+// 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
+
+// variables:
+int sensorValue = 0;         // the sensor value
+int sensorMin = 1023;        // minimum sensor value
+int sensorMax = 0;           // maximum sensor value
+
+void setup() {
+  // initialize serial communications (for debugging only):
+  Serial.begin(9600);
+    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:
+  int sensorReading = analogRead(sensorPin);
+  // print the sensor reading so you know its range
+  Serial.println(sensorReading);
+  // map the analog input range (in this case, 400 - 1000 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:
+  int thisPitch = map(sensorReading, sensorMin, sensorMax, 220, 3500);
+
+  // play the pitch:
+  if (sensorReading < sensorMax -50) {
+  tone(ledPin, thisPitch, 10);
+  }
+  delay(1);        // delay in between reads for stability
+}
+*/