Project for detecting DUI by engineering students.

1. Drunk Driving Prevention System
Under the Guidance of Prof. Jagdish Kumar & Dr. Mohd Alam
Presented by
Prachi Singla 17104028
Pratyush Kumar 17104049
Rayvin Thingnam 17104103
Juvraj 17104110
Manish Verma 17104113

2. Objective
• According to NCRB (National Crime Records Bureau), “Driving under
influence of alcohol contributed 1.7% of total accidents which
resulted in injuries to 6,675 persons and 2,972 deaths in the country
(India).”
• 8-9 deaths everyday due to alcohol induced driving!
Automatically lock the ignition system of the car in
case the driver has consumed alcohol.

3. Phase 1
The system makes use of a
comparator. The output from
alcohol sensor is fed to
comparator and according to
it comparator switches
ON/OFF the buzzer.
Comparator
Alcohol
Sensor
Reference
Voltage
Battery
Buzzer

4. Phase 1: Circuit Diagram
 Mq3 sensor
 Potentiometer
 Lm358 comparator
 Buzzer
 Resistors
 LED

5. Phase1: Working

6. Phase 2: Our Goal
 Substitute a car ignition system
to simulate the shut down of car
after sensing alcohol in breath of
the driver.
 For high sensitivity, fast response
and wide range detection, add a
microcontroller and for much
more information.

7. Major Components
 Regulated power supply.
 Microcontroller.
 DC motors with driver.
 Reset.
 Crystal Oscillator
 LED indicators.

8. Power Supply
Step down
transformer
(V-0-12 )
Bridge
Rectifier
Capacitive
Filter
Regulator
(7805)
230 v AC +5V DC
 Every embedded system requires dc voltage and that that will be 5v supply.
 Digital electronic devices need digital supply and we can get supply from
regulated power supply block.

9. Micro Controller
 PIC has four optional clock sources.
 RC oscillator (low cost).
 Programmable timers and on-chip ADC.
 Up to 12 independent interrupt sources.
 Powerful output pin control
 EPROM/OTP/ROM/Flash memory option.
 I/O port expansion capability.

10. Input: Alcohol Sensor
• Operating Voltage: 5V ± 0.1
• Concentration: 0.05 mg/L ~ 10 mg/L Alcohol
• Current Consumption: 150mA
• Output sensitivity adjustable
• Analog output 0V to 5V and Digital output 0V or 5V
• Low Cost and Fast Response
• Stable and Long Life
• Fair Sensitivity to Alcohol Gas
• Both Digital and Analog Outputs
• Operation Temperature: -10°C~ 70°C

11. Output
PMDC Motor
 Smaller size
 Cost Efficient for Small Ratings
 No Field Circuit Copper Losses
 Good Efficiency
Piezo Buzzer
 High Reliability Electromagnetic Buzzers
 Applicable to Automobile Equipment
 Pin Type Terminal Construction
 Direct Mounting onto Circuit Boards

12. Circuit Diagram

13. Working

14. Real Time Application
Entire system will remain same as above prototype. Addition
of relay-circuit breaker system, in place of dc motor, to the
spark plug.

15. Limitations
• BAC different for different areas.
• Needs trial and testing to ensure safety.
• Limited knowledge of the ignition system.
• Abrupt stoppage of car can cause accidents.

16. Future Scope
• GSM to Alert Friends and Family.
• GPRS Technology to Track the Driver.
• More Research for Application in Vehicles.
• Safety Considerations
• Better Display Alert
• Better Sound Alert