Clap Echo Reverb Box Kit with Arduino Uno – Build a Handclap Echo Machine in 2 Hours

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

You clap, an echo comes back, as if you’re standing in a giant empty hall. This kit turns a simple handclap into a layered, repeating sound effect using a microphone, Arduino, and small speaker. It’s the kind of device that blends physics with programming—perfect for science demonstrations, magic tricks, or just having fun with sound.

What You'll Build

A standalone audio box that listens for a clap, stores the sound wave instantly in the Arduino’s SRAM, and then plays it back with a decaying delay—creating a natural echo or reverb. Clap once and hear the sound bounce away. Clap twice and the echoes overlap, like you’re inside a canyon. The whole circuit fits on a breadboard and runs off a 9V battery, so it’s portable and hands-on.

What You'll Learn

• Capturing audio signals with the MAX4466 microphone and reading them through Arduino’s analog input
• Storing sound samples in the Arduino Uno’s SRAM to create a real-time buffer
• Writing code loops that introduce delay and feedback to simulate echo and reverb effects
• Driving an 8Ω speaker using the PAM8403 amplifier with PWM audio output

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is designed for beginner makers in India—CBSE Class 11–12 students exploring sound processing in physics practicals, B.Tech ECE first-year students building mini projects, ATL Tinkering Labs under the AIM initiative, and any 5–15-year-old curious about how echoes are created digitally. If you’ve ever wondered how a clap turns into a repeating sound, this project makes it tangible.

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.