Build Fun Piano with Ultrasonic using Maker Nano RP2040

Abdulrahman Alhamed
08 Sep 2022
945

This tutorial shows how to make a piano using an ultrasonic sensor and Maker Nano RP2040. The project is super fun and very simple to make! ??

Video Tutorial

How Does it Work?

Components Required

Connection

Code

#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); } }

Project Complete

screenshot — Upon completing the project successfully, the buzzer will beep in a specific tone based on the distance between the ultrasonic and the object

Tags

Build Fun Piano with Ultrasonic using Maker Nano RP2040

Video Tutorial

How Does it Work?

Components Required

Connection

Code

Project Complete

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