ezo e RGB

[sketchbook_andrea] / piezo / piezo_1_tonePitchFollower / piezo_1_tonePitchFollower.ino

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+/*
+  Pitch follower
+ 
+ Plays a pitch that changes based on a changing analog input
+ 
+ circuit:
+ * 8-ohm speaker on digital pin 8
+ * photoresistor on analog 0 to 5V
+ * 4.7K resistor on analog 0 to ground
+ 
+ created 21 Jan 2010
+ modified 31 May 2012
+ by Tom Igoe, with suggestion from Michael Flynn
+
+This example code is in the public domain.
+ 
+ http://arduino.cc/en/Tutorial/Tone2
+ 
+ */
+
+
+void setup() {
+  // initialize serial communications (for debugging only):
+  Serial.begin(9600);
+}
+
+void loop() {
+  // read the sensor:
+  int sensorReading = analogRead(A0);
+  // 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);
+
+  // play the pitch:
+  tone(9, thisPitch, 10);
+  delay(1);        // delay in between reads for stability
+}
+
+
+
+
+
+