🦯 Smart Blind Stick Using Arduino Nano | Obstacle & Water Detection Project

Описание: In this video, I have built a Smart Blind Stick using Arduino Nano, Ultrasonic Sensor, Soil Moisture Sensor, Buzzer, and Vibration Motor. This project is specially designed to help visually impaired people detect obstacles and wet surfaces while walking.

🔹 The ultrasonic sensor detects obstacles within 70 cm and activates loud buzzer sound and vibration.
🔹 The soil moisture sensor detects water or muddy surfaces and gives a unique vibration and alert pattern.
🔹 If both obstacle and water are detected together, the system gives fast blinking alerts for high danger indication.

This project is low-cost, portable, and easy to build. It improves safety and independence for visually challenged people.

🔧 Components Used:

Arduino Nano

HC-SR04 Ultrasonic Sensor

Soil Moisture Sensor

Buzzer

Vibration sensor

Battery Supply

Code link:https://docs.google.com/document/d/1A...


This video provides a detailed guide on building a smart blind stick using an Arduino Nano (0:00). The stick is designed to assist visually impaired individuals by detecting obstacles and wet surfaces, enhancing their safety and independence (0:08).

Key components and their functions:
Ultrasonic Sensor: Detects obstacles within a 70 cm range, triggering a loud buzzer and vibration (0:47).
Soil Moisture Sensor: Identifies water or muddy surfaces, activating a unique vibration and alert pattern (1:04).
Buzzer and Vibration Motor: Provide dual alerts (sound and vibration) for detected dangers (10:53).
Arduino Nano: Processes data from the sensors and controls the alert system (5:49).

The video demonstrates the step-by-step assembly, including connecting components, wiring, and uploading the Arduino code (1:13). It also highlights how the system provides different alert patterns for various conditions, such as continuous alerts for close objects, pulsing alerts for water, and fast-blinking alerts for both. The project aims to be low-cost, portable, and easy to build

⚙ Working Principle

Sensors continuously check the surroundings. When danger is detected, Arduino processes the data and activates buzzer and vibration alerts based on the situation.

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🎯 Objectives

To help blind people detect obstacles

To detect wet or muddy surfaces

To provide audio and vibration alerts

To increase user safety and independence

⚙ Features:

✅ Obstacle detection
✅ Water detection
✅ Dual alert system (Sound + Vibration)
✅ Smart danger indication
✅ Low cost & easy to implement


| Condition | Vibration | Buzzer |
| ------------------ | --------------- | ----------------------- |
| Object ≤ 20cm | Continuous ON | Continuous Loud |
| Only Soil Moisture | Blinking ON/OFF | Pulsing ERM style sound |
| Both Detected | Fast Blinking | Fast Blinking |
| Nothing | OFF | OFF |

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