Blind Stick Obstacle Detector Lab Kit with Arduino Uno & Ultrasonic – Prototype Assistive and Smart Home 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.

This lab kit puts real-world assistive technology in your hands. Build an obstacle-detecting blind stick that measures distance with the HC-SR04 sensor and displays alerts on the 0.96in OLED. Then rewire the same components to create a water-saving cistern monitor: the ultrasonic sensor tracks fill level, the relay closes a valve at a preset threshold to prevent overflows, and the RTC logs every flush cycle to the microSD card — potentially saving 2 litres per flush. One kit, two impactful applications that are ready for your next CBSE project, B.Tech mini‑project, or Smart India Hackathon prototype.

What You'll Build

A fully functional, desktop‑prototype obstacle detector that simulates a blind stick. Distances appear in real‑time on the OLED, while the relay can activate a buzzer or vibrating motor (not included) when obstacles are within a programmed range. Then, repurpose the HC-SR04 facing a transparent container or cistern model, let the relay drive an external solenoid valve, and watch the system automatically stop filling. The RTC and microSD module create a timestamped log of water usage — a complete, tangible demonstration of accessible and sustainable engineering.

What You'll Learn

• Interface an HC-SR04 ultrasonic sensor with Arduino Uno for precise distance measurement and decision‑making logic.
• Drive a 5V relay module from Arduino to control high‑current devices like valves or alarms based on sensor thresholds.
• Display real‑time sensor data on a 0.96in OLED and write time‑stamped logs to a microSD card using a DS3231 RTC.
• Use 1N4007 diodes and 10kΩ resistors for flyback protection and pull‑up/pull‑down in mixed‑circuit prototypes.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11–12 computer science students prototyping assistive technology for practicals, B.Tech ECE/EEE 2nd‑year mini‑project groups, and ATL Tinkering Lab participants. Smart India Hackathon teams working on accessibility or water‑conservation themes will find the kit a ready‑to‑go sensor‑actuator core. If you’ve tinkered with Arduino before and want to see how electronics can solve real‑world problems, this kit fits perfectly.

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.