Build a Blind Stick Obstacle Detector with BBC Micro:bit & Ultrasonic Sensor – An Accessibility Technology Demo for Kids

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 a stick that alerts its user to obstacles through sound – that's exactly what you'll build with this BBC Micro:bit kit. The ultrasonic sensor detects objects, and the piezo buzzer beeps more frequently the closer you get, turning a simple stick into an accessibility tool. This project introduces young makers to assistive technology through hands-on STEM learning.

What You'll Build

By the end of this 2-3 hour build, you'll hold a functional blind stick prototype that uses sound to indicate obstacle distance. Attach the sensor and buzzer to any walking stick, program the Micro:bit, and test it around your home – every nearby object triggers a unique beep pattern. It's a real-world application of electronics that sparks empathy and innovation.

What You'll Learn

• Instrumenting an HC-SR04 ultrasonic sensor to measure distance precisely
• Programming the BBC Micro:bit to map sensor readings to variable buzzer beep rates
• Designing feedback systems that convert sensor data into audible alerts, simulating a blind stick
• Applying STEM concepts to create an accessible technology solution for the visually impaired

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for young innovators in CBSE schools exploring STEM, ATL Tinkering Lab members building accessibility prototypes, and kids aged 8-10 curious about how technology helps people. Also perfect for science fair exhibitions and parents looking for meaningful projects that blend electronics with social impact.

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.