Local Speech-to-Text Display Badge
Local Speech-to-Text Display Badge – Build a Wearable That Transcribes Without the Cloud
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 spoken words appear instantly on a small display clipped to your shirt — and no data ever leaves the device. This kit puts Whisper.cpp, a compact automatic speech recognition engine, onto a Qualcomm MPU-powered board. You’ll solder, flash firmware, and watch your badge turn speech into text in real time, all while building a deep understanding of embedded machine learning and hardware integration.
What You'll Build
You’ll assemble a wearable badge that captures speech through an I2S MEMS microphone, runs inference entirely on the Arduino UNO Q’s Qualcomm processor, and shows the transcription line-by-line on a crisp 1.8-inch TFT. No internet, no subscriptions, no privacy trade-offs — just a self-contained, always-ready speech-to-text accessory you can adapt for captioning, quick notes, or your next hackathon demo.
What You'll Learn
- Compile and deploy Whisper.cpp on a Qualcomm-based microcontroller for offline AI inference
- Interface an INMP441 I2S digital microphone and capture audio at the right sample rate
- Drive an ST7735 SPI TFT display to render text in real time with minimal latency
- Integrate power management, decoupling circuitry, and physical assembly into a badge form factor
Kit Contents
| Component | Quantity |
|---|---|
| Arduino UNO Q | 1 |
| INMP441 I2S Mic | 1 |
| 1.8in TFT ST7735 | 1 |
| 4.7kΩ Resistors | 5 |
| 100nF Capacitors | 5 |
| PCB Prototype Board | 1 |
| USB-C Hub | 1 |
| 5V 3A Power Supply | 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
Ideal for B.Tech ECE/EEE students exploring edge AI, Smart India Hackathon participants building offline accessibility tools, and ATL Tinkering Lab mentors who want a hands-on wearable AI project. If you’re an intermediate maker comfortable with soldering and Arduino IDE basics, this kit bridges the gap between textbook ML and a working device on your lapel.
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?
Open the Compoden AI companion from the QR code; it knows the exact solder joints, pin mappings, and firmware steps. If needed, we’ll jump on WhatsApp to get you unstuck within the hour.
Can I modify the badge to transcribe Hindi or other Indian languages?
Whisper.cpp supports multiple languages, and the Arduino UNO Q has enough compute to run a small multilingual model. The AI companion includes guidance on swapping models.
Does the kit require any prior experience with Qualcomm boards?
No — we preload the necessary board support packages and provide a complete flashing walkthrough. You’ll pick up the specifics as you build.
What can I use this badge for beyond the project?
Use it as a real-time captioning aid, a hands-free note taker in lectures, or the core of a voice-controlled interface — all while keeping data private.
Whisper.cpp runs on the Qualcomm MPU. Captured speech transcribed locally and displayed on TFT — no cloud.
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.
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