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