Project Hub /Healthcare Biomedical & Assistive/Blind Stick / Haptic Assistive Navigation/How to build Blind Stick using Arduino Nano and Ultrasonic sensor

Beginner

ARDUINO

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

How to build Blind Stick using Arduino Nano and Ultrasonic sensor

A smart walking stick designed for visually impaired individuals using an Arduino Nano and an ultrasonic sensor to detect obstacles and provide audible and visual alerts.

Originally published on CircuitDigest

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

Arduino Nano C Type V3 ATMEGA328 with Soldered Headers Rs. 608.00
Ultrasonic Sensor Module HC-SR04 Rs. 89.00
Piezo Buzzer (Big) 6-12V Rs. 45.00
10pcs - 220 ohm 1/4 W Resistor Set Rs. 39.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

This list includes a generic resistor set as a placeholder — it is not matched to the exact value or part number this circuit needs. The correct one is specified on the original source page linked above; check it before buying.

We don't carry yet: Diodes (1N4007 / 1N4148 / Schottky / Zener)
9V Battery + Snap
Pipes / Tubing / Hose / Fittings

Browse all components

How It Works

The Blind Stick project operates by combining distance measurement with multi-sensory feedback to assist visually impaired individuals. At the heart of the system is an Arduino Nano, which continuously coordinates the operation. The HC-SR04 ultrasonic sensor acts as the environmental scanner; it emits high-frequency sound waves and measures the time it takes for the echo to return after bouncing off an obstacle ahead. The Arduino Nano processes this echo duration to calculate the precise distance between the user and the hazard. Depending on the computed distance, the microcontroller triggers output devices mounted on the PVC pipe frame. If an obstacle is detected within a predefined threshold range, the 5V active buzzer sounds an audible alert, while the light-emitting diode (powered safely through a current limiting resistor) provides a visual warning indicator. Power is supplied to the entire circuit via a 9V battery, routed through a slider switch for easy manual on-off control. All electronic components are interconnected securely using a breadboard and connecting wires, forming a compact, self-contained haptic and sensory assistive navigation tool.

Why Build This

Develop a practical assistive technology device that directly addresses real-world mobility challenges for visually impaired individuals.

Gain hands-on experience integrating microcontrollers with active sensors and feedback transducers for real-time monitoring.

Apply foundational undergraduate engineering principles to build a reliable, low-cost prototype using standard hardware components.

Real-World Application

Assistive navigation device for visually impaired and blind individuals to safely detect obstacles in real-time.

Skills You'll Learn

Ultrasonic distance ranging

Microcontroller GPIO control

Digital input/output handling

Circuit prototyping on breadboards

Power management with batteries

Safety Precautions

Ensure correct polarity when connecting the 9V battery to avoid short circuits.

Technology Tags

ARDUINO

ULTRASONIC SENSOR

HC-SR04

BUZZER

LED

EMBEDDED C

MULTITASKING

Frequently Asked Questions

How does the HC-SR04 sensor detect obstacles?

The sensor sends out an ultrasonic sound wave pulse and calculates the distance to an object by measuring how long it takes for the echo to bounce back to the receiver.

Why is a current limiting resistor required for the LED?

The resistor restricts the amount of electrical current flowing through the LED, preventing it from burning out due to excessive voltage from the circuit.

Can I power the Arduino Nano directly with the 9V battery?

Yes, the Arduino Nano can accept a 9V battery input, but you should always double-check your polarity connections before powering on to prevent short circuits.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-01171