Blind Stick using Arduino Nano

A blind stick using an Arduino Nano is a smart assistive device designed to aid visually impaired individuals in navigating their surroundings safely. This device uses an Arduino Nano microcontroller and an ultrasonic sensor to detect obstacles, providing haptic or auditory feedback to alert the user.

Components:

1. Arduino Nano: The core microcontroller that processes input from the ultrasonic sensor and controls output devices like buzzers or vibrating motors.
2. Ultrasonic Sensor: This sensor measures the distance between the stick and obstacles in front of it by emitting ultrasonic waves and receiving the echoes. The sensor calculates the distance to the object based on the time it takes for the waves to return.
3. Battery: A portable power source, typically a 3.7V Li-ion battery, provides power to the entire system, ensuring it operates efficiently for extended periods.
4. TP4056 Module: A charging and protection module for the Li-ion battery. It regulates charging to prevent overcharging or deep discharge, extending battery life and ensuring safety.
5. Switch: A simple on/off switch to power the device as needed, conserving battery life when not in use.
6. PVC Foldable Stick: The physical structure of the blind stick, which is made from lightweight, durable PVC. The foldable design ensures portability and ease of storage.

Working Principle:

The ultrasonic sensor continuously emits ultrasonic waves, and when these waves hit an object, they bounce back to the sensor. The Arduino Nano processes the time taken for the waves to return and calculates the distance to the object. If an obstacle is detected within a predefined range, the Arduino triggers an output like a buzzer sound or a vibrating motor to alert the user of the obstacle.

Benefits and Applications:

• Affordable and Compact: Utilizing readily available components, this device is low-cost, making it accessible to many.
• Easy to Use: Lightweight and foldable, the stick is easy to carry and store.
• Enhanced Mobility: Improves safety and independence for visually impaired users by alerting them to obstacles, reducing the risk of accidents.

Conclusion:

A blind stick using Arduino Nano is an innovative and practical solution that leverages technology to assist visually impaired individuals, promoting independence and safety through a simple yet effective design.

Third Eye for Blind project using STM32 and an Ultrasonic Sensor