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master
Michael Murtaugh 5 years ago
parent fd9a13208f
commit a48cb44f23

@ -1,20 +1,4 @@
/*
Pitch follower
Plays a pitch that changes based on a changing analog input
circuit:
- 8 ohm speaker on digital pin 9
- photoresistor on analog 0 to 5V
- 4.7 kilohm 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() {
@ -24,25 +8,18 @@ void setup() {
void loop() {
// read the sensor:
int sensorReading = analogRead(0);
// print the sensor reading so you know its range
Serial.print("0: ");
Serial.print(sensorReading);
Serial.print(", 1: ");
Serial.print(analogRead(0));
Serial.print(" ");
Serial.print(analogRead(1));
Serial.print(", 2: ");
Serial.print(" ");
Serial.print(analogRead(2));
Serial.print(", 3: ");
Serial.print(" ");
Serial.println(analogRead(3));
// 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, 400, 1000, 120, 1500);
// play the pitch:
// tone(11, thisPitch, 10);
delay(250); // delay in between reads for stability
}

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