Arduino Hand Washing Timer Kit – Build a Melody Countdown That Teaches Perfect Hygiene

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

Hand washing is a simple but critical habit, and this kit turns it into an engaging electronics project for young learners. The builder creates a compact device that sits beside any soap dispenser. When hands come near, an infrared sensor triggers a 20-second countdown with a cheerful melody and a glowing LED, ensuring everyone scrubs for the full recommended time. It’s a hands-on way to blend health awareness with Arduino programming, perfect for teaching timing logic and sensor use.

What You'll Build

You’ll assemble a battery-powered module on a breadboard using the included components. The IR proximity sensor detects a hand within a few centimeters, then the Arduino Nano lights up two green LEDs and plays a tune through a passive buzzer for exactly 20 seconds—the WHO-recommended duration for effective hand washing. It’s self-contained, portable, and immediately useful in a bathroom or kitchen, encouraging consistent hygiene habits.

What You'll Learn

• Program an Arduino Nano to read digital sensor input and control output pins
• Understand infrared proximity sensing for touch-free activation
• Build a countdown timer with visual and audio feedback using LEDs and a buzzer
• Learn circuit assembly on a breadboard, including resistor placement and wiring

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is designed for children aged 8 and above who want to explore electronics while building a practical hygiene tool. It’s an excellent fit for ATL Tinkering Labs, CBSE Class 5–9 science projects, or a parent-child bonding activity over weekends. B.Tech ECE/EEE students can also use it as a beginner-friendly introduction to sensor integration and real-world applications, and even school science fairs will find it impressive.

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.