Hands-On LDR Light Theremin Kit with Arduino Uno – Build a Light-Controlled Synthesizer

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

Transform light into music! This Arduino-powered theremin lets you control pitch by simply covering or uncovering the light-dependent resistors (LDRs). Perfect for young makers exploring how sensors translate real-world changes into sound. No soldering – just plug components into the breadboard and upload the code.

What You'll Build

You'll assemble a working light theremin that responds to hand gestures over two LDR sensors. One sensor controls pitch, the other can be used for volume or effects as you expand. The passive buzzer creates clear tones that change instantly as ambient light shifts – wave your hand to play melodies, or use a torch to trigger sounds from across the room.

What You'll Learn

• How an LDR (Light Dependent Resistor) changes resistance with light intensity
• Reading analog sensor values with Arduino’s analog-to-digital converter
• Mapping sensor input to audio frequency using the tone() function
• Circuit building on a breadboard – connecting LDRs, resistors, and buzzer without soldering

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 5–10 students exploring sensor-based electronics, ATL Tinkering Lab projects, and beginner Arduino enthusiasts. Parents and teachers can run a complete STEM workshop in 2–3 hours with clear, age-appropriate instructions. B.Tech first-years and hobbyists from IITs, NITs, and VIT will also use it to quickly prototype light-to-sound interfaces.

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.