Voice-Controlled Home Appliance Kit: Arduino Uno & HC-05 Relay Control

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 your smartphone into a voice command centre for real home appliances. This intermediate kit lets you build a speech‑responsive controller—pair an Android phone via Bluetooth, speak keywords like “light on” or “fan off,” and watch the 4‑channel relay module switch 230V loads while an LCD confirms every action. It’s a complete, tested system that turns a Bluetooth Audio Receiver concept into a practical, voice‑controlled smart home project.

What You'll Build

You’ll assemble a standalone voice‑activated appliance controller. An Arduino Uno listens to HC‑05 for speech‑to‑text commands sent from a free Android app. Each spoken keyword triggers a specific relay that can turn a lamp, fan, heater, or any small AC device on or off. The 16×2 LCD with I2C interface displays the current appliance status in real time, giving you a polished, demonstrable prototype ready for school exhibitions or hackathons.

What You'll Learn

• Program Arduino Uno for Bluetooth serial communication using the HC‑05 module.
• Wire a 4‑channel relay module with flyback diodes to safely switch 230V AC appliances.
• Integrate an I2C backpack with a 16×2 LCD to show live relay states and messages.
• Implement speech‑to‑text keyword detection on Android and map spoken words to relay actions.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This intermediate kit fits CBSE Class 11‑12 students building investigatory projects on voice‑controlled home automation, B.Tech ECE & EEE undergraduates prototyping in mini‑projects, and Smart India Hackathon participants needing a reliable voice‑relay prototype. It’s also trusted by ATL Tinkering Lab mentors and final‑year students at IIT, NIT, VIT, and BITS Pilani who want a pre‑tested, ready‑to‑code solution instead of sourcing from multiple vendors.

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.