X-Git-Url: http://git.piffa.net/web?a=blobdiff_plain;f=piezo%2Fpiezo_1_tonePitchFollower%2Fpiezo_1_tonePitchFollower.ino;fp=piezo%2Fpiezo_1_tonePitchFollower%2Fpiezo_1_tonePitchFollower.ino;h=e74c7b343449a5c366c457ebb127c5887d99dcc4;hb=54de1d245a98a8032e8c41089158321f6be58b1c;hp=0000000000000000000000000000000000000000;hpb=ca9bc9014acdfae3ee07d19650c547f02b796994;p=sketchbook_andrea

diff --git a/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower.ino b/piezo/piezo_1_tonePitchFollower/piezo_1_tonePitchFollower.ino
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index 0000000..e74c7b3
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+++ b/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
+}
+
+
+
+
+
+