My Secret box

The Project

This project is designed to work as a security system for a personal box. One microbit is placed inside the box, and the other is kept with us. When someone opens the box, the light level inside increases. The microbit inside the box detects this change using its light sensor. If the light level crosses a set limit, it sends a signal using the radio feature to the second microbit, which then triggers an alarm to alert us. We were inspired to build this project because we wanted to create a simple but smart way to protect personal items—like a digital lock or alert system. It’s a fun and practical way to learn about sensors and communication between microbits. The most challenging part was calibrating the light sensor properly, so that normal lighting wouldn't trigger a false alarm. We also had to make sure the radio signal was reliable every time the box was opened. Thank you for checking out our project—we hope it inspires others to build smart, creative solutions with microbit!

View this project on YouTube