Seismic Vibration Sensor Array Kit with Arduino Mega + LED
Seismic Vibration Sensor Array Kit with Arduino Mega – 3-Channel FFT Analysis for Structural Health Monitoring
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 an Arduino Mega into a precise seismic monitoring station. Three ADXL345 accelerometers connect through a TCA9548A I2C multiplexer, each sampled at 200 Hz to capture subtle tremors or structural vibrations. A real-time Fast Fourier Transform (FFT) extracts dominant frequency components per axis—exactly what structural engineers need to detect resonance, cracks, or early warning of seismic events.
What You'll Build
You’ll assemble a 3-node sensor array that streams synchronized acceleration data to a microSD card with DS3231 RTC timestamps, while a 0.96-inch OLED shows live FFT peaks or raw g values. The system is calibrated to record continuous vibration signatures, making it ready to deploy on a bridge model, a shake table, or a building scale replica for research or competition prototypes.
What You'll Learn
- I2C multiplexing using TCA9548A to manage three identical sensors on a single bus
- Configuring ADXL345 for 200 Hz bandwidth and high-resolution sampling
- Coding a real-time FFT on Arduino Mega to compute dominant vibration frequencies
- Time-series data logging with DS3231 RTC and microSD for later MATLAB/Python analysis
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| ADXL345 | 3 |
| TCA9548A I2C Mux | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 4.7kΩ Resistors | 10 |
| 100nF Capacitors | 15 |
| 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 and EEE students tackling structural dynamics or earthquake engineering electives will find this kit aligned with curriculum labs and Smart India Hackathon themes on disaster mitigation. Researchers at IITs, NITs, VIT, or BITS exploring low-cost SHM systems can prototype a distributed sensor network rapidly. ATL Tinkering Labs mentoring advanced students in IoT sensing will also value the end‑to‑end data pipeline.
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 inside the box to start a conversation with the AI companion, which has seen every wiring and code step of this kit. If you hit a hardware snag, message us on WhatsApp for a direct engineer reply within hours.
Can I increase the sampling rate above 200 Hz?
The ADXL345 can go to 3200 Hz, but 200 Hz is chosen for reliable I2C multiplexing across three sensors. The included code is optimized for this rate; you can experiment with higher rates by adjusting bandwidth and I2C speed with the AI’s guidance.
How do I interpret the FFT output on the OLED?
The display cycles through x, y, and z axes, showing the frequency bin with the highest magnitude in Hz. The companion explains how to correlate peaks with structural modes or event signatures, and how to export full spectral data from the microSD for deeper analysis.
Is soldering experience necessary?
Yes. This advanced kit requires soldering headers, pull-up resistors, and decoupling capacitors onto prototype boards. The build companion provides high-resolution images and suggests techniques, but prior soldering comfort is essential.
Three ADXL345 on TCA9548A I2C mux sample at 200Hz. FFT identifies dominant vibration frequency in each axis.
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.
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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