1. Accident Prevention for Automobiles with
Eyeblink and Alcohol Sensor
Aim:
To built an intelligent vehicle with safety measures, to Prevent
Accidents of vehicles.
Features in the Project:
Accident Indication:
Suppose if any accident is detected, it can be indicated to a nearest
hospital. This is implemented using an Infrared sensor. The vehicle consist
of a IR Transmitter and the IR Receiver is placed in two different zones.
When the vehicle comes into contact with the IR receiver, that will be
indicated to the system and the zone information is passed to the remote
place. This is shown by glowing different LEDs for different zones.
Alcohol Sensing:
An alcohol sensor is included in the vehicle for sensing whether the
driver has consumed alcohol. If consumed, then vehicle will be stopped
automatically by controlling the motors.
Sleep Detection:
Further more we can use an Eye blink Sensor, which can be fixed to
the drivers, Head, to monitor whether the driver has slept, or about to sleep,
so that we can alert the driver by vibrating the driver seat using DC Motors.
For project Demonstration we have implemented a small model with
Sensors fixed to it.

2. Eye Blink Sensor
Power
Supply
Signal
Conditioning
Circuits PIC Microcontroller
PIC 16F877
LED1
LED2
Alarm DC
Motor for
Motor Driver Vehicle
Motor
Alcohol
Power Relay
Sensor
Supply
DC
Motor for
Motor Driver Seat Vibr
Motor
Power Relay
Supply
Power Supply:

3. Uses to generate DC +12V, +5V Power supply from the give 230V
AC Supply
Eye Blink Sensor:
Used to convert the eye blink action into voltage pulses for every
blink.
Signal Conditioning Circuits:
Used to convert the voltage pulses delivered from the eye blink sensor
to ttl level signals which should be given to a microcontroller for processing.
Alcohol Sensor:
Produces voltage ouput according the alcohol sensing level.
Motor Driver:
The signal output from the controller is not sufficient to drive a DC
Motor. So a current amplification is necessary before giving to the motor. So
the motor driver board is used
Motor Power Supply:
Used to generate the motor power supply of +12V DC from the 230V
AC Supply.
Relay:
Used to switch on/off the power supply of the motor, as decided by the
controller.
LED1 and LED2:
Used to indicate the status whether the vehicle has stopped due to the
Alcohol sensor, or the driver has slept by monitoring the Eye blink sensor
Alarm:
Alarm is enabled whenever there is fault condition.
PIC 16F877 Microcontroller:
Core Features:

4. • High performance RISC CPU
• Only 35 single word instructions to learn
• All single cycle instructions except for program Branches which are two
cycle
• Operating speed: DC - 20 MHz clock input
DC - 200 ns instruction cycle
• Up to 8K x 14 words of FLASH Program Memory,
Up to 368 x 8 bytes of Data Memory (RAM)
• Interrupt capability (up to 14 sources)
• Direct, indirect and relative addressing modes
• Power-on Reset (POR)
• Power-up Timer (PWRT) and
Oscillator Start-up Timer (OST)
• Processor read/write access to program memory
• Wide operating voltage range: 2.0V to 5.5V
• Low-power consumption:
- < 0.6 mA typical @ 3V, 4 MHz
- < 1 µA typical standby current
Peripheral Features:
• Timer0: 8-bit timer/counter with 8-bit prescaler
• Timer1: 16-bit timer/counter with prescaler, can be incremented during
SLEEP
• Timer2: 8-bit timer/counter with 8-bit period register, prescaler and
postscaler

5. • 10-bit multi-channel Analog-to-Digital converter
• Synchronous Serial Port (SSP) with SPI (Master mode) and
12C(Master/Slave)
• Universal Synchronous Asynchronous Receiver Transmitter (USART/SCI)
with 9-bit address detection
• Parallel Slave Port (PSP) 8-bits wide, with external RD, WR and CS
controls (40/44-pin only)