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@idriszmy
Created November 30, 2022 07:41
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Build fun piano with ultrasonic using Maker Nano RP2040
#define echoPin 12
#define trigPin 13
#define led1 14
#define led2 15
#define buzzer 22 // buzzer pin in Maker Nano RP2040 is 22
// defines variables
long duration; // variable for the duration of sound wave travel
int distance; // variable for the distance measurement
void setup()
{
Serial.begin(9600);
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(buzzer, OUTPUT);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}
void loop()
{
// Ultrasonic Code
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = duration * 0.034 / 2;
Serial.print("Distance: ");
Serial.print(distance);
Serial.println("cm");
if (distance < 5) {
tone(buzzer, 523); // Play tone C
digitalWrite(14, HIGH);
digitalWrite(15, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(14, LOW);
digitalWrite(15, LOW);
delay(500);
}
else if (distance < 10) {
tone(buzzer, 587); // Play tone D
digitalWrite(14, HIGH);
digitalWrite(15, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(14, LOW);
digitalWrite(15, LOW);
delay(500);
}
else if (distance < 15) {
tone(buzzer, 659); // Play tone E
digitalWrite(14, HIGH);
digitalWrite(15, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(14, LOW);
digitalWrite(15, LOW);
delay(500);
}
else if (distance < 20) {
tone(buzzer, 698); // Play tone F
digitalWrite(14, HIGH);
digitalWrite(15, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(14, LOW);
digitalWrite(15, LOW);
delay(500);
}
else if (distance < 25) {
tone(buzzer, 783); // Play tone G
digitalWrite(14, HIGH);
digitalWrite(15, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(14, LOW);
digitalWrite(15, LOW);
delay(500);
}
else if (distance < 30) {
tone(buzzer, 880); // Play tone A
digitalWrite(14, HIGH);
digitalWrite(15, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(14, LOW);
digitalWrite(15, LOW);
delay(500);
}
else if (distance < 35) {
tone(buzzer, 987); // Play tone B
digitalWrite(14, HIGH);
digitalWrite(15, HIGH);
delay(500);
noTone(buzzer);
digitalWrite(14, LOW);
digitalWrite(15, LOW);
delay(500);
}
else {
noTone(buzzer);
digitalWrite(14, LOW);
digitalWrite(15, LOW);
}
}
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