Baby Cry Detector Kit: Learn Double-Clap Pattern Detection with Arduino Uno and Sound Sensor

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

Imagine turning on a lamp in your baby’s room with two gentle claps—no noisy switches, no waking the baby. This kit guides you through building a sound-activated controller that listens for a double clap pattern and toggles a relay to switch a lamp on or off. You’ll dive into real-world signal processing, learning how to debounce sound triggers and recognize distinct timing patterns.

What You'll Build

You’ll assemble a complete double-clap detector module on a breadboard, connect a sound sensor to an Arduino Uno, and write code that captures two claps within a short window. The finished system drives a relay that can safely control a table lamp or nightlight, giving you a practical baby room automation gadget. Once you master the double-clap logic, you can easily adapt it to respond to a baby’s cry or any rhythmic sound pattern.

What You'll Learn

• Interfacing a KY-038 sound sensor with Arduino and reading both analog and digital outputs
• Implementing a debounce algorithm to ignore spurious noise and false triggers
• Designing a finite state machine to detect a precise double clap sequence
• Safely driving a 5V relay module to switch an AC lamp or appliance

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This project is perfect for CBSE Class 11–12 students experimenting with embedded systems, B.Tech ECE undergraduates working on sound‑based mini projects, and ATL Tinkering Labs that introduce pattern detection. Parents and children aged 5–15 (with adult supervision for the relay wiring) can enjoy a fun weekend build that results in a genuinely useful home automation tool.

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.