| /* |
| keyboard |
| |
| Plays a pitch that changes based on a changing analog input |
| |
| circuit: |
| * 3 force-sensing resistors from +5V to analog in 0 through 5 |
| * 3 10K resistors from analog in 0 through 5 to ground |
| * 8-ohm speaker on digital pin 8 |
| |
| created 21 Jan 2010 |
| modified 9 Apr 2012 |
| by Tom Igoe |
| |
| This example code is in the public domain. |
| |
| http://arduino.cc/en/Tutorial/Tone3 |
| |
| */ |
| |
| #include "pitches.h" |
| |
| const int threshold = 10; // minimum reading of the sensors that generates a note |
| |
| // notes to play, corresponding to the 3 sensors: |
| int notes[] = { |
| NOTE_A4, NOTE_B4,NOTE_C3 }; |
| |
| void setup() { |
| |
| } |
| |
| void loop() { |
| for (int thisSensor = 0; thisSensor < 3; thisSensor++) { |
| // get a sensor reading: |
| int sensorReading = analogRead(thisSensor); |
| |
| // if the sensor is pressed hard enough: |
| if (sensorReading > threshold) { |
| // play the note corresponding to this sensor: |
| tone(8, notes[thisSensor], 20); |
| } |
| } |
| } |