Loud Environment Hearing Alert Kit with Arduino Nano + LED
Build a Hearing Alert Badge with Arduino Nano & LED Warning Lights
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Your child can build a wearable badge that glows red when noise hits dangerous levels — turning a fun electronics project into a real health awareness tool. The MAX4466 microphone listens for sustained sound above 80dB, and two bright LEDs warn them to move away or protect their ears. Perfect for classrooms, noisy events, or just building smart habits that last a lifetime.
What You'll Build
A compact, battery-powered alert badge that clips onto a shirt or bag. When the noise around you crosses the safe threshold, red LEDs flash, giving instant visual feedback. It’s a tangible reminder that loud environments can harm hearing — and a working piece of wearable tech you assembled yourself.
What You'll Learn
- How a microphone amplifier circuit converts sound waves into voltage
- Programming an Arduino Nano to read analog sensor data and set thresholds
- Soldering-free breadboard prototyping and LED circuit basics
- Understanding decibel levels and hearing safety for everyday life
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Nano | 1 |
| MAX4466 Mic Amp | 1 |
| 5mm Red LED | 2 |
| 5mm Yellow LED | 2 |
| 220Ω Resistors | 5 |
| 10kΩ Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 15 |
| 9V Battery Snap | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Designed for curious minds aged 5-15, this kit suits CBSE Class 6-10 science projects, ATL Tinkering Lab activities, and home-schooling parents introducing IoT and health. It’s also a perfect starter for young inventors participating in Smart India Hackathon Junior and similar school-level innovation challenges.
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.
What if I get stuck during the build?
Simply scan the QR code on the box to open the AI build companion, which walks you through each step with this exact project. You can also reach us on WhatsApp for personal help.
How loud does it need to be to trigger the LEDs?
The MAX4466 is calibrated to respond to sustained noise above 80dB — roughly the level of a busy city street or a loud classroom. You can adjust the sensitivity threshold in the provided Arduino code.
Is this kit safe for young children?
Absolutely. The circuit runs on a 9V battery, no soldering is required, and all components are low-voltage. Adult supervision is recommended for builders under 10 years.
Can I modify the sensitivity or add a buzzer?
Yes, the Arduino sketch is open. Change the dB threshold value in the code, and the breadboard gives you freedom to attach a buzzer or extra LEDs with a few more wires and components.
MAX4466 mic detects sustained noise above 80dB and triggers LED warning to protect hearing.
What's in this kit
- Arduino Nano
- MAX4466 Mic Amp
- 5mm Red LED x2
- 5mm Yellow LED x2
- 220Ω Resistors x5
- 10kΩ Resistors x5
- 400-pt Breadboard
- M-M Wires x15
- 9V Battery Snap
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items