Acoustic Gunshot Localisation System Kit with Arduino Mega
Acoustic Gunshot Localisation Kit with Arduino Mega – 2D Threat Detection
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Transform any building into a gunshot alert system. This kit uses four high-gain MAX9814 microphones placed at corners to compute time-difference-of-arrival, instantly triangulating a shot’s 2D coordinates with sub-meter accuracy. Ideal for defence researchers, security integrators, and IoT engineers building real-time perimeter threat detection.
What You'll Build
You'll assemble a complete acoustic localisation system: four microphone nodes wired to an Arduino Mega, capturing gunshot-type impulse sounds. The system timestamps audio surges via DS3231 RTC and logs TDOA data to microSD. A SIM800L GSM module sends SMS alerts with coordinate estimates, while the 2.4-inch TFT display shows the origin overlaid on a building floor plan.
What You'll Learn
- Implement cross-correlation and TDOA algorithms on Arduino to localize impulsive sounds in a 2D plane.
- Synchronize four independent audio channels using DS3231 RTC timestamps for accurate time-of-arrival computation.
- Design a custom sensor PCB for noise immunity and stable amplification with MAX9814 modules.
- Integrate SIM800L GSM for real-time SMS alerts that include estimated threat coordinates without GPS.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| MAX9814 Mic Amp | 4 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| SIM800L GSM | 1 |
| LM2596 Buck Converter | 1 |
| 2.4in TFT ILI9341 | 1 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 15 |
| PCB Prototype Board | 3 |
| Enclosure Box | 1 |
| 12V 3A PSU | 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 final-year students working on security surveillance projects, Smart India Hackathon participants prototyping defence solutions, IIT/NIT/VIT/BITS research scholars in acoustic signal processing, and security system integrators building custom gunshot detection for campus or perimeter monitoring.
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 your kit box to open the AI companion, which walks you through every connection and code block. If needed, our team can also assist via WhatsApp for this advanced project.
Can this system differentiate between gunshots and firecrackers?
The TDOA firmware includes a bandpass filter and amplitude threshold tuned for impulsive sounds with sub‑millisecond rise times. While firecrackers may occasionally trigger, the algorithm reduces false positives; you can further refine detection by editing the Arduino sketch provided.
What typical 2D accuracy can I expect?
With careful mic placement and sub‑100µs RTC timestamping, the system achieves 0.5–1 metre accuracy within a 50 m×50 m area. The companion guide details a calibration routine to fine‑tune your installation.
Is this kit suitable for a first‑time Arduino builder?
This is an advanced project. We recommend prior experience with Arduino programming and basic signal processing. The AI companion simplifies the hardware setup, but debugging the TDOA logic may require some DSP familiarity.
Four MAX9814 mics at corners of a building compute TDOA to estimate gunshot origin in 2D plane.
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