1. SEMINOR ON
REMOTE ACCIDENT REPORT SYSTEM
FOR HIGHWAYS USING RF

2. AIM
The Aim of this is to monitor the accidents which
occur on the highways using RF technology.
The purpose of this is to report the monitoring
section whenever accident occurs on the highways

3. ABSTRACT
In present days Electronic communication takes an important
role. In this we are sending information about vehicle accident by using RF
communication with the help of Microcontroller.
An accident is a specific, identifiable, unexpected, unusual and
unintended external event which occurs in a particular time and place,
without apparent or deliberate cause but with marked effects, it implies a
generally negative probabistic outcome which may have been avoided or
prevented circumstances leading up to the accident been recognized, and
acted upon, prior to its occurrence.

4. COMPONENTS
 Microcontroller
 Max 232
 Buzzer
 Transformer
 H-Bridge
 LCD

5. BLOCK DIAGRAM:
TRANSMITTER SECTION
MICRO CONTROLLER
Power supply
AT89S52 HT 12E
Encoder
RF
TRANSMITTER
H-Bride Motor
Accident detection
ckt

6. RECEIVER SECTION
MICRO CONTROLLER
Power supply LCD
AT89S52
BUZZER
HT12D RF
decoder RECEIVER

7. PORT 1:
Motors are connected to port one of micro controller through two h bridges. The
two h bridges are connected to P1.0, P1.1, P1.2 and P1.3 respectively
PORT 3:
Switch is connected to P3.7. It is acts like an accident identification sensor.
PORT 2:
 Port 2 can act as both input as well as output port. The microcontroller port 2 pins
are connected to the transmitter circuit. We are using HT12E IC which is a 18 pin Ic.

8. PORT 0:
This port 0 can act as both input as well as output port. In this port zero is
connected to lcd. The data pins of lcd is connected to data pins of lcd.
PORT 2:
 Port 2 can act as both input as well as output port. The microcontroller port 2
pins are connected to the receiver circuit. We are using HT12D IC which is a 18
pin decoder.
BUZZER:
Buzzer is connected to the port p3.0.

9. Micro Controller
The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K
bytes of in-system programmable Flash memory.
The device is manufactured using Atmel’s high-density nonvolatile memory
technology and is compatible with the industry- standard 80C51 instruction set and
pin out.
The on-chip Flash allows the program memory to be reprogrammed in-system or
by a conventional nonvolatile memory programmer.

10. RF Transmitter
315/434 MHz ASK TRANSMITTER
Here in this the RF transmitter module is not directly connected to
microcontroller. An Encoder is connected between the RF module and the
controller, in order to encode the data for efficient transmission of the data.

11. RF Receiver
315/434 MHz ASK RECEIVER
In this RF receiver is connected as shown in the schematic. The DATA
pin is connected to the decoder HT648L which decodes the received
signal and gives to the microcontroller.

12. Power Supply
The power supplies are designed to convert high voltage AC mains electricity to a
suitable low voltage supply for electronics circuits and other devices. A RPS
(Regulated Power Supply) is the Power Supply with Rectification, Filtering and
Regulation being done on the AC mains to get a Regulated power supply for
Microcontroller and for the other devices being interfaced to it.

13. H-BRIDGE:
 H-bridge is to construct with transistors and Motor. It is used to control the vehicle.

14. Buzzer
Buzzer is for alarming purpose ,when ever the system will find any
accident occurrence the buzzer will buzz.

15. APPLICATIONS
 Car security system
 Wireless security system
 Automation system
 Remote keyless entry
Advantages
To control the accidents

16. CONCLUSION
The “REMOTE ACCIDENT REPORT SYSTEM FOR HIGHWAYS USING
RF” has been successfully studied, Integrating features of all the hardware
components used have developed it. Presence of every module has been
reasoned out and placed carefully thus contributing to the best working of the
unit.