Concept :
For our musical instrument, we decided to craft an innovative instrument using an Ultrasonic sensor, a button, and a Buzzer. To kick off the musical vibes, just gently hold down the button. Now, here’s where it gets interesting when you wave your hand in front of the ultrasonic sensor at varying distances it unveils a different array of notes!
Code snippet :
int trig = 10;
int echo = 11;
int buttonPin;
long duration;
long distance;
void setup() {
pinMode(echo, INPUT);
pinMode(trig, OUTPUT);
Serial.begin(9600);
}
void loop() {
digitalWrite(trig, LOW); //triggers on/off and then reads data
delayMicroseconds(2);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
distance = (duration / 2) * .0344; //344 m/s = speed of sound. We're converting into cm
int notes[7] = {261, 294, 329, 349, 392, 440, 494}; //Putting several notes in an array
// mid C D E F G A B
buttonPin = analogRead(A0);
if (distance < 0 || distance > 50 || buttonPin < 100) { //if not presed and not in front
noTone(12); //dont play music
}
else if ((buttonPin > 100)) { //if pressed
int sound = map(distance, 0, 50, 0, 6); //map distance to the array of notes
tone(12, notes[sound]); //call a certain note depending on distance
}
}
Challenges:
I wouldn’t call this one a challenge but more of a hiccup really was that we found ourselves repeatedly unplugging and replugging them due to connectivity issues and the Arduino kept on giving errors.