A-SLA05 - Feel the distance with sound and light
in SkillBot Learning KitAbout this course
Description:
ProxiGuard is a simple yet effective proximity alert system built using Arduino, an ultrasonic sensor, LED, and a buzzer. It detects nearby objects and provides audio-visual alerts based on distance, making it ideal for obstacle detection, parking assistance, and safety monitoring. This project offers hands-on learning in sensor integration, basic automation, and real-world electronics application.
🚀 Real-Time Usage Scenarios:
Obstacle Detection for Robots:
Used in autonomous robots to detect nearby obstacles and avoid collisions.
Parking Assistance System:
Helps in reverse parking by alerting the driver about obstacles behind the vehicle.
Blind Spot Detection:
Can be mounted on cycles, bikes, or small vehicles to alert about objects in the blind spot.
Smart Door Alert System:
Notifies when someone approaches your front door or crosses a defined boundary.
Industrial Safety Systems:
Alerts workers if they enter restricted zones near machines or moving parts.
Social Distancing Monitors:
During pandemics, used to ensure people maintain a safe distance.
🎓 Takeaways from the Project:
Understanding Sensor Integration:
Learn how to interface ultrasonic sensors with Arduino and measure distance accurately.
Signal Processing Logic:
Implement threshold logic for decision-making (e.g., when to turn on LED/buzzer).
Real-world Application of Electronics:
Apply basic electronics to create something tangible and practical.
Coding Skills:
Practice writing clean Arduino code involving conditionals, loops, and serial debugging.
Creative Thinking:
Explore different ways to extend this system (e.g., using vibration motors, displays, or wireless alerts).
Intro to Automation & Safety Systems:
See how simple components can work together to form automated safety solutions.
Prerequisites
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Objective:
To design and implement a low-cost, real-time proximity alert system that detects nearby objects and triggers visual and audio alerts using an ultrasonic sensor, LED, and buzzer connected to an Arduino.
🧰 Components Required:
Component Quantity
Arduino Uno/Nano 1
Ultrasonic Sensor (HC-SR04) 1
Buzzer 1
LED (Red or any color) 1
Power Supply (USB or Battery) 1
⚙️ Working Principle:
The system uses an HC-SR04 ultrasonic sensor to measure the distance between itself and an object. It emits ultrasonic sound waves and calculates the time it takes for the echo to return.
If an object is detected within a predefined threshold (e.g., 50 cm):
The LED turns ON.
The buzzer sounds an alert.
If the object is farther than the threshold:
Both the LED and buzzer remain OFF.
🌍 Real-time Applications:
Robotics – Autonomous robot obstacle detection.
Vehicles – Reverse parking assistance.
Industrial Zones – Worker safety near machines.
Security Systems – Motion or boundary detection.
Smart Homes – Alert when someone approaches a door.
🧠 Learning Outcomes:
Understanding ultrasonic sensing principles.
Arduino coding and interfacing skills.
Building real-time systems using basic electronics.
Visual and audio alert mechanism integration.
Foundation for advanced automation and robotics.
Download and explore the code with step by step explanation
