| /* | |
| Arduino Starter Kit example | |
| Project 7 - Keyboard | |
| This sketch is written to accompany Project 7 in the Arduino Starter Kit | |
| Parts required: | |
| - two 10 kilohm resistors | |
| - 1 megohm resistor | |
| - 220 ohm resistor | |
| - four pushbuttons | |
| - piezo | |
| created 13 Sep 2012 | |
| by Scott Fitzgerald | |
| https://store.arduino.cc/genuino-starter-kit | |
| This example code is part of the public domain. | |
| */ | |
| // create an array of notes | |
| // the numbers below correspond to the frequencies of middle C, D, E, and F | |
| int notes[] = {262, 294, 330, 349}; | |
| void setup() { | |
| //start serial communication | |
| Serial.begin(9600); | |
| } | |
| void loop() { | |
| // create a local variable to hold the input on pin A0 | |
| int keyVal = analogRead(A0); | |
| // send the value from A0 to the Serial Monitor | |
| Serial.println(keyVal); | |
| // play the note corresponding to each value on A0 | |
| if (keyVal == 1023) { | |
| // play the first frequency in the array on pin 8 | |
| tone(8, notes[0]); | |
| } else if (keyVal >= 990 && keyVal <= 1010) { | |
| // play the second frequency in the array on pin 8 | |
| tone(8, notes[1]); | |
| } else if (keyVal >= 505 && keyVal <= 515) { | |
| // play the third frequency in the array on pin 8 | |
| tone(8, notes[2]); | |
| } else if (keyVal >= 5 && keyVal <= 10) { | |
| // play the fourth frequency in the array on pin 8 | |
| tone(8, notes[3]); | |
| } else { | |
| // if the value is out of range, play no tone | |
| noTone(8); | |
| } | |
| } | |