Nano Audio Spectrum Badge Kit with Arduino Nano + LED
Nano Audio Spectrum Badge Kit: Arduino Nano-Powered Wearable LED Music Visualizer
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn sound into light with a badge that dances to every beat. This kit lets you build a compact, battery-powered spectrum analyzer you pin to your shirt, bag, or lanyard. The Arduino Nano samples audio through a MAX9814 microphone module, runs an FFT algorithm to split frequencies into bands, and drives 8 bright LEDs that bounce in real time. Perfect for music festivals, campus fests, hackathon demos, or just geeking out with a wearable that actually does something.
What You'll Build
You’ll assemble and solder a fully functional audio spectrum badge on a prototype PCB, then slide it into a small enclosure (not included, but easy to improvise). The finished badge reads ambient music or your voice, lights up the LED bar with crisp frequency response, and runs for hours on a rechargeable LiPo cell. Wear it, show it off, and tweak the code to change colors, sensitivity, or animation patterns.
What You'll Learn
- Implement an FFT (Fast Fourier Transform) on an Arduino Nano with limited memory
- Interface an electret microphone with a MAX9814 preamp and understand gain settings
- Solder through-hole components neatly on prototyping board
- Design a portable power system using a LiPo battery and TP4056 charger module
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Nano | 1 |
| MAX9814 Mic Amp | 1 |
| 5mm LED Assorted | 8 |
| 3.7V LiPo 500mAh | 1 |
| TP4056 Module | 1 |
| 220Ω Resistors | 10 |
| 100nF Caps | 5 |
| PCB Prototype Board | 2 |
| Soldering Iron | 1 |
| Solder Wire | 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
Ideal for CBSE Class 11–12 students exploring digital signal processing, B.Tech ECE/EEE undergrads building mini projects, and participants in Smart India Hackathon or ATL Tinkering Lab challenges. If you’re a hobbyist from IIT, NIT, VIT, BITS, or any maker space who wants a wearable demo that combines audio, embedded C, and portable electronics, this kit lands at the right level.
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?
Scan the QR code on the box to open the AI companion; it walks you through every step, from soldering the mic circuit to uploading the FFT sketch. You can also reach us on WhatsApp for a quick reply.
Can I recharge the battery, and how long does it last?
Yes, the TP4056 module charges the 500mAh LiPo via any micro-USB cable. A full charge gives around 2–3 hours of continuous LED visualization.
Do I need prior soldering experience?
Some basic soldering is helpful, but the AI companion includes a beginner-friendly soldering guide with pacing, photos, and common mistakes to avoid. The PCB prototype board is forgiving and you get extra resistors to practice.
How can I customize the LED patterns or sensitivity?
You can modify the open-source Arduino sketch; the AI companion explains the FFT code and shows you where to change gain, color order, or animation style. The Nano is easy to reprogram via USB.
FFT on Nano with MAX9814 mic drives a compact 8-LED spectrum bar badge powered by LiPo. Wearable music viz.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
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