Bluetooth Audio Receiver Pro Kit with Arduino Uno + HC-05 — Build an RSSI Proximity Lock for Your Computer

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Imagine your computer locking itself the moment you leave your desk, then unlocking hands-free as you return. This kit turns that concept into working hardware — you'll use an Arduino Uno and HC-05 Bluetooth module to read RSSI signal strength from your phone, fire a relay to simulate a Windows keypress, and create a personal proximity-based security system. Designed around real-world privacy concerns in shared labs, college dorms, or home offices, it’s a project that combines wireless sensing with practical automation.

What You'll Build

A compact Bluetooth RSSI proximity lock that automatically secures your PC when your paired smartphone moves out of range, and unlocks it again when you come back. The relay module isolates your Arduino from the computer and triggers a clean “Win+L” keystroke — no drivers required. You can set the RSSI threshold exactly to your workspace dimensions, so the lock engages only when you genuinely step away.

What You'll Learn

• Interfacing the HC-05 Bluetooth module with Arduino and reading real-time RSSI values from a paired smartphone.
• Setting an intelligent RSSI threshold to detect proximity and filter out brief signal fluctuations.
• Controlling a 5V relay to emulate the Windows lock keystroke (Win+L) while ensuring complete galvanic isolation.
• Adding protection diodes, status LEDs, and debounce logic to build a reliable, fail-safe system.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students building IoT projects, B.Tech ECE/EEE undergraduates preparing mini-project demonstrations, Smart India Hackathon teams prototyping secure access control, and ATL Tinkering Lab innovators exploring Bluetooth sensor applications. This kit fits neatly into any curriculum or idea contest where proximity‑triggered automation is the core concept.

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.