LED Bar Graph Volume Meter Kit — Turn Sound into Light with Arduino Uno

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

Clap, sing, or just talk near the tiny MAX9814 microphone, and see 10 LEDs light up in real time, following the loudness of your voice. This kit turns the abstract idea of “loudness” into a live bar graph — a perfect first data-visualization project for curious minds. Forget boring code-only lessons; you’ll wire sensors, blink LEDs, and watch physics meet code, all while building a gadget that responds instantly to sound.

What You'll Build

You’ll assemble a plug-and-play breadboard circuit with the Arduino Uno at its heart, connecting the MAX9814 mic amplifier and a row of 10 LEDs. The Arduino reads sound levels through its built-in ADC, then maps those numbers to the LED bar: whisper and one LED glimmers; shout and all ten fire up. The final device is a standalone volume meter that runs on a 9V battery — perfect for show-and-tell, school science fairs, or just impressing your friends with a light show that dances to your favorite song.

What You'll Learn

• How an analog microphone signal gets amplified and turned into a digital number using the Arduino’s ADC
• Linear mapping from sensor readings (0–1023) to LED outputs (0–10 LEDs) — the core idea behind dashboards and meters
• Basic breadboarding and circuit connections without soldering, using pre-cut jumper wires and a 400-point board
• Debugging sensor circuits: checking voltages, verifying connections, and adjusting thresholds for smooth LED response

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for students in CBSE Class 6–10 exploring sound and sensors, ATL Tinkering Lab project hours, or parents looking for a screen-free STEM weekend activity. Also fits B.Tech first-year practicals at VIT, NIT, or state universities where basic Arduino interfacing is part of the curriculum. Even Smart India Hackathon beginners can use this kit as a warm-up for sensor-data dashboards. No prior coding needed — the Arduino code is pre-written and explained step by step by the included AI companion.

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.