Arduino Uno Ultrasonic LED Theremin Visualiser Kit — Create Music with a Wave of Your Hand

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

Build an electronic instrument that turns hand gestures into music and light. The closer your hand gets to the ultrasonic sensor, the higher the pitch and the more LEDs light up in vibrant colours — no buttons, no touching, just motion. A perfect blend of art and electronics for students who want to see and hear their code in action.

What You'll Build

A theremin-inspired visualiser that responds to hand distance in real time. You'll mount the HC-SR04 sensor, wire a 30-LED NeoPixel strip, and program a passive buzzer to change tone as you move — creating an interactive display where sound and colour shift together. Every build ends with a fully functional demonstration piece ready for school tech fests or personal maker showcases.

What You'll Learn

• Map ultrasonic distance readings to PWM tone frequencies for a passive buzzer.
• Program NeoPixel WS2812B LEDs to shift colour, brightness, and position based on sensor input.
• Use Arduino's NewPing and FastLED libraries for smooth, responsive real‑time feedback.
• Troubleshoot timing issues between sensor reads and LED updates so the instrument feels fluid and natural.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11–12 students exploring sensor-based projects, B.Tech ECE/EEE undergraduates prototyping for Smart India Hackathon, and ATL Tinkering Lab mentors guiding interactive art installations. The kit also suits BITS, VIT, and NIT students building creative electronics for college fests and technical exhibitions.

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.