Introduction: The Sound Recreater V2!!! (My Second Instructable)

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This project brings together sound and motion to make a tiny robot that can sing and drum at the same time!

A passive buzzer plays the song, while a servo motor moves like a drumstick, hitting the beat every few seconds to act like a bass drum.

You can load simple tunes (like Twinkle Twinkle Little Star or your favorite song), and the servo will tap along with the rhythm giving your music a live performance feel! 🎶

This is Version 2, where we attach a pencil or stick to the servo horn so it can hit a surface like a real drum.

Attachments

Supplies

Arduino Uno – 1 piece (main controller)

⚙️ Servo Motor (SG90 or similar) – 1 piece (moves like a drumstick)

Passive Buzzer – 1 piece (plays the melody)

Jumper Wires – around 6 (for connections)

USB Cable – 1 piece (for power and uploading code)

✏️ Pencil or Small Stick – 1 piece (acts as drumstick attached to servo arm)

Drum Surface – any small box, plastic lid, or paper cup (the surface the pencil taps)

Step 1: Mount the Servo

  1. Fix your servo onto a small box or table using double-sided tape or glue.
  2. Attach a pencil or stick to the servo horn this is your drumstick.
  3. Make sure it can freely swing up and down without hitting the surface too hard.


Step 2: Setting Up the Bass

  1. Place a small rubber pad, plastic lid, or cardboard box just under the pencil tip.
  2. When the servo moves down, it should tap the surface lightly.


Step 3: Giving the Bot Its Voice

  1. Connect the passive buzzer to Pin 8 (positive) and GND (negative).
  2. Remember: passive buzzers can play multiple tones, while active buzzers can only beep.


Step 4: Uploading Time,

#include <Servo.h>


Servo drumServo;

int buzzer = 8;


#define C 261

#define D 294

#define E 329

#define F 349

#define G 391

#define A 440


int melody[] = {

C, C, G, G, A, A, G,

F, F, E, E, D, D, C,

G, G, F, F, E, E, D,

C, C, G, G, A, A, G

};


int noteDurations[] = {

400, 400, 400, 400, 400, 400, 800,

400, 400, 400, 400, 400, 400, 800,

400, 400, 400, 400, 400, 400, 800,

400, 400, 400, 400, 400, 400, 800

};


unsigned long lastBeat = 0;

int beatInterval = 2000; // Beat every 2 seconds


void setup() {

drumServo.attach(9);

drumServo.write(90);

pinMode(buzzer, OUTPUT);

}


void loop() {

for (int i = 0; i < 28; i++) {

tone(buzzer, melody[i]);

checkAndHitDrum();

delay(noteDurations[i]);

noTone(buzzer);

}


delay(3000); // pause before repeating

}


void checkAndHitDrum() {

unsigned long currentTime = millis();

if (currentTime - lastBeat >= beatInterval) {

hitDrum();

lastBeat = currentTime;

}

}


void hitDrum() {

// Lower servo hit for deeper bass

drumServo.write(135);

delay(200);

drumServo.write(80);

}





upload this code in arduino ide and tweak it accordingly of you servo arm placement.

Step 5: Personalise the Bot!

🔧 Testing

  1. Connect your Arduino via USB.
  2. Upload the code and open the Serial Monitor (optional).
  3. Watch your servo tap every 2 seconds while the buzzer playsTwinkle Twinkle Little Star!

To change how fast it drums:

  1. Edit the line → int beatInterval = 2000;
  2. 1000 → faster
  3. 3000 → slower chill beat


Step 6: Other Songs !

int melody[] = {E, D, C, D, E, E, E, D, D, D, E, G, G};

int noteDurations[] = {400,400,400,400,400,400,800,400,400,800,400,400,800};



replace this in the main code and find out what this song is!! !”! !



Step 7: Things I Could Have Added But I Was Too Lazy


  1. Add an LCD display to show the current song name or beat animation.
  2. Add a button to switch songs.
  3. Add two servos for left-right drum effects.
  4. Include LEDs that flash with the beat.


Step 8: The Demonstration! and Side View

The buzzer is beside the board.

Attachments

Step 9: Conclusion With Final Product

I have made this project in succession to its v1 hope you will a blast in creating this beginner friendly project!

Attachments