Signal Processing FFT Analyser Kit with Arduino Mega
Master Digital Signal Processing: Build a 40kHz FFT Spectrum Analyser with Arduino Mega
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Capture real-world sound with a MEMS microphone, digitise it at 40 kilosamples per second, and run a 1024‑point Fast Fourier Transform in real time. The result is a live frequency spectrum on a vivid 2.4‑inch TFT, complete with peak identification – a professional‑grade signal analyser built entirely around an Arduino Mega.
What You'll Build
A standalone audio spectrum analyser that decomposes any sound into its constituent frequencies from 20 Hz to 20 kHz. The ILI9341 colour display plots the magnitude spectrum and highlights the dominant frequency, turning your desk into a mini laboratory for acoustics, music analysis, and embedded DSP experimentation.
What You'll Learn
- Configuring the Arduino Mega’s ADC for 40 kHz sampling without aliasing
- Solving real‑time FFT magnitude computation and frequency‑bin mapping
- Rendering a dynamic spectrum waterfall and peak marker on an SPI TFT display
- Designing and soldering a noise‑free analog front‑end with the MAX9814
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| MAX9814 Mic Amp | 1 |
| 2.4in TFT ILI9341 | 1 |
| 10kΩ Resistors | 5 |
| 100nF Caps | 5 |
| PCB Prototype Board | 2 |
| 9V Battery Snap | 1 |
| 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
B.Tech ECE, EEE, and Instrumentation students diving into digital signal processing coursework, final‑year projects, and hackathon prototypes. Ideal for Smart India Hackathon teams, IIT, NIT, VIT, and BITS Pilani undergraduates looking to demonstrate a full real‑time FFT pipeline – from analog capture to spectrum visualisation – in a single portable unit.
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 to launch the AI companion, which diagnoses wiring, code, and signal‑chain issues step by step. You can also reach us on WhatsApp for human support within 24 hours.
Do I need prior experience with FFT?
Basic Arduino IDE familiarity is enough. The AI companion explains the FFT theory, library calls, and frequency‑bin mapping, so you can follow along even if concepts are new.
Can I power the analyser portably?
Absolutely. The included 9 V battery snap runs the Mega and display for hours, making it perfect for field measurements and classroom demos without a laptop.
Will this kit help with my engineering final‑year project?
Yes. You’ll have a working FFT analyser to demonstrate to evaluators, plus detailed inline code commentary and DSP knowledge that strengthen your project report.
Arduino Mega samples at 40kHz. ArduinoFFT computes 1024-point FFT. TFT shows spectrum with peak frequency.
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