Voice Assistant Home Controller Kit with Raspberry Pi Zero + Relay
Build a Private, Offline Voice Assistant Home Controller with Raspberry Pi Zero + Relay
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Speak to your home, not to a data centre. This kit lets you create a completely offline voice assistant using a Raspberry Pi Zero W running Rhasspy, a wake word engine, and a 4-channel relay module. Command lights, fans, or any appliance by room name—"kitchen light on"—and the relay triggers instantly, all processed locally. No cloud, no internet, no privacy leaks.
What You'll Build
A fully integrated offline voice controller that recognises spoken room names and toggles connected appliances via the relay module. You will build a system that responds to your chosen wake word, processes speech locally on the Pi Zero W, and switches 230V loads safely through opto-isolated relays with protective diodes. Once complete, you have a private smart home hub that never shares a single byte of audio with any external server.
What You'll Learn
- Setting up a Rhasspy offline speech pipeline on Raspberry Pi Zero W, including intent recognition and text-to-speech
- Training custom wake word models and configuring slot values for different room names
- Wiring and soldering relay circuits with flyback diode protection using the included soldering iron
- Configuring GPIO-based automation scripts that translate voice commands into physical appliance control
Kit Contents
| Component | Quantity |
|---|---|
| Raspberry Pi Zero W | 1 |
| USB Microphone | 1 |
| PAM8403 Amp | 1 |
| 3W 8Ω Speaker | 1 |
| 4-ch Relay Module | 1 |
| 1N4007 Diode | 5 |
| 40-pin GPIO Header | 1 |
| M-F Wires | 20 |
| MicroSD Card 16GB | 1 |
| 5V 2A 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
Ideal for B.Tech ECE/EEE students building capstone projects in offline home automation, IoT professionals working in privacy-sensitive environments, and DIY enthusiasts who want a local alternative to cloud-dependent assistants. Whether you are an architect at a Bengaluru edge-AI startup or a meticulous maker in Pune crafting a fully private smart home, this kit delivers the pre-verified hardware and guided intelligence to go from unboxing to voice control in a single weekend.
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?
The AI companion provides real-time troubleshooting for every step, from flashing Rhasspy to tuning the wake word. If you need human input, reach us on WhatsApp and we'll help you within hours.
Can I use Hindi or regional language wake words?
Yes. Rhasspy supports custom acoustic models trained offline. You can record your own wake word samples in Hindi, Marathi, or any language, and the AI companion walks you through the training process.
What if I don't know how to solder?
The soldering iron and wire are included precisely for this reason. The companion app gives close-up, step-by-step soldering guidance for the diode protection circuit on the relay board, turning a potential hurdle into a skill you'll keep forever.
Can I add more relays later?
Absolutely. The kit's 4-channel module uses a well-documented GPIO pinout, and you can stack additional relay boards to free pins. The diode protection scheme scales seamlessly, and the AI companion includes a section on expansion.
Pi Zero W runs Rhasspy offline. Wake word triggers relay zones by room name without any 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.
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