View source for Arduino: Tone di kontrol oleh analog input

==Code==

 /*
   Pitch follower
 
  Plays a pitch that changes based on a changing analog input
 
  circuit:
  * 8-ohm speaker on digital pin 9
  * potensio on analog input A0
  * 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://www.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
 }