The project aim is to develop an intelligent system, capable of avoiding drunken driving. The Alcohol Detection and Automatic Vehicle Control System using RF is a safety system designed to prevent drunk driving and reduce road accidents. An alcohol sensor detects the presence of alcohol near the driver and sends the information to a microcontroller. If alcohol is detected above the preset limit, the microcontroller transmits the signal wirelessly through an RF transmitter to the vehicle unit. The RF receiver receives the signal and automatically stops the DC motor, preventing the vehicle from moving. This system provides reliable wireless communication, enhances road safety, reduces accidents, and minimizes human and financial losses.        

This project Features are:  

  Alcohol Detection – Detects alcohol near the driver using an MQ-series alcohol sensor.

  Automatic Vehicle Control – Automatically stops the DC motor when alcohol is detected above the preset limit.

  Wireless RF Communication – Uses RF transmitter and receiver modules for reliable wireless data transfer.

  Accident Prevention – Prevents drunk driving, reducing the risk of road accidents.

  Microcontroller-Based Operation – Provides fast, accurate, and reliable system control.

  Low-Cost and Easy to Implement – Simple design suitable for vehicle safety and educational embedded system projects.          

The major building blocks of this project are:

1. Regulated power supply.
2. PIC microcontroller
3. Reset button
4. Crystal Oscillator
5. RF transmitter and RF receiver modules
6. Encoder and Decoder.
7. DC Motors.
8. Motor driver

       

Software’s used:  

• PIC-C compiler for Embedded C programming.
• PIC kit 2 programmer for dumping code into Micro controller.
• Express SCH for Circuit design.

       

Regulated power supply:

       

               

Block Diagram:                  

video: