by Tom Igoe, with suggestion from Michael Flynn
This example code is in the public domain.
-
- http://arduino.cc/en/Tutorial/Tone2
+
+- http://www.dummies.com/how-to/content/how-to-make-an-instrument-with-the-arduino.html
+- https://www.arduino.cc/en/Tutorial/tonePitchFollower
*/
+// 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);
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, 300, 900, 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. Modificare lo script in modo che vengano emessi suoni solo quando
+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).
-
*/
-
-
-