Alcohol-Based Engine Locking System

is an innovative automotive safety project that combines sensor technology, microcontroller processing, and vehicle control to prevent drunk driving incidents. The system works by having the driver blow into an alcohol sensor module before starting the vehicle. The sensor detects ethanol concentration in the breath and sends the data to a microcontroller, which compares it against a preset safe limit. If the alcohol level is above the allowed threshold, the microcontroller immediately triggers a relay or actuator to lock the engine or disable the ignition system, preventing the vehicle from starting. This project not only enhances driver safety but also promotes responsible driving behavior. It is highly reliable, fast-acting, and can be adapted for use in cars, two-wheelers, and other motor vehicles. Additionally, it can be integrated with alert systems such as buzzers, LEDs, or IoT notifications to inform users or authorities about a violation, making it suitable for academic projects, research demonstrations, and real-world automotive safety applications.