1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
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 9 Apr 2012
by Tom Igoe
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 pitch to the range of the analog input.
// change the minimum and maximum input numbers below
// depending on the range your sensor's giving:
int thisPitch = map(sensorReading, 400, 1000, 100, 1000);
// play the pitch:
tone(9, thisPitch, 10);
delay(1); // delay in between reads for stability
}
|
