Car Accident Prevention System
Alcohol Detection and Vehicle Immobilization with Real-time Alert and Cloud Database Logging 🚗🛑
IoT-based system preventing drunk driving by detecting alcohol levels, automatically immobilizing the vehicle, and sending real-time alerts
Alcohol Detection
MQ-3 sensor continuously monitors alcohol levels near the driver
Vehicle Immobilization
Automatic motor speed reduction to simulate safe braking when alcohol detected
Real-time Alerts
Instant email notifications sent to traffic authorities
Cloud Logging
Incident data logged to ThingSpeak with vehicle and owner details
🔧 Hardware Components
ESP32 Dev Board
Wi-Fi-enabled microcontroller
MQ-3 Sensor
Alcohol gas sensor (analog + digital)
L293D Driver
Motor control
DC Motor
Vehicle movement simulation
Push Button
Manual motor ON/OFF switch
12V Power Supply
Powers motor & ESP32
📡 Working Principle
User starts the vehicle using a push button
MQ-3 sensor continuously monitors alcohol levels
If alcohol is detected:
- Motor speed reduces gradually to simulate safe braking
- An alert email is sent to traffic authorities
- Incident is logged to ThingSpeak with timestamp, vehicle registration, owner name, license number, system ID and IMEI
If no alcohol is detected, motor runs normally
Project Prototype & Output
Hardware Setup
Serial Monitor Output
Email Alert
Serial Output - Analog Values
