Build an Ultrasonic Theremin with Arduino Uno Kit | Compoden

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Your child becomes a magician the moment their hand hovers over this kit. The HC-SR04 ultrasonic sensor sees every movement and a passive buzzer sings in response—closer makes a high squeal, farther drops to a low hum. There are no buttons, no screens, just an invisible field that turns gestures into music. It’s the perfect weekend project to spark an early love for electronics and coding.

What You'll Build

You’ll place an Arduino Uno, an HC-SR04 sensor, and a passive buzzer on a breadboard and connect them with jumper wires. After uploading the provided sketch, the theremin reacts instantly to anything within its sensing range. Kids love making ghostly sounds by wiggling fingers, discovering how sensor timing becomes pitch—a hands-on lesson that feels like pure magic.

What You'll Learn

• How an ultrasonic sensor sends and receives sound pulses to measure distance in centimeters
• Translating analog distance readings into frequency values using Arduino's tone() function
• Stable breadboard circuit layout with resistors and clean wiring practices
• Calibrating minimum and maximum distance thresholds to create a responsive playing field

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for young explorers in CBSE Class 5–10 who want an entry‑level electronics project that feels like a performance. ATL Tinkering Labs use it to demonstrate sensor‑actuator loops, and parents love it as a screen‑free creative activity. B.Tech aspirants and hobby clubs at IIT, NIT, or VIT tech fest stalls also adopt it for quick, crowd‑pleasing demos.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.