Micro:bit Friendship Bracelet Radio Kit — Build a Pair of Wireless Secret-Messaging Devices

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 slipping a note to your best friend—without a word. With this kit, two young makers create a pair of BBC micro:bits that beam invisible messages across the room. A simple squeeze of the board’s accelerometer triggers a custom secret symbol or phrase, turning an ordinary electronics project into a digital friendship bracelet. No screens, no keyboards: just a tiny computer, a radio, and the joy of a shared code.

What You'll Build

Two fully portable micro:bit stations powered by AA batteries. When you squeeze one, a private message—like a heart icon or a pre‑programmed “hello”—flashes on the other. The pair can sit on a desk, clip to a backpack, or be worn as a wristband, always listening for a friend’s squeeze. Kids craft the gesture and the response, making every exchange a secret only they know.

What You'll Learn

• Program a micro:bit to detect accelerometer gestures (shake, squeeze, tap)
• Set up radio groups for private 1‑to‑1 communication
• Display custom strings and icons on the LED matrix
• Power a standalone device with battery packs and understand voltage needs

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for curious kids stepping into code—whether at home, in a hobby club, or inside an ATL Tinkering Lab. The drag‑and‑drop MakeCode editor lets Class 6‑8 CBSE students explore radio concepts without syntax stress. Perfect for siblings, best friends, or a parent‑child weekend project where the first successful secret message becomes an unforgettable high‑five moment.

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.