Project

On

Accident alert

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Introduction:

In this project we will control the accidents on road. We are

making collision system. When any car or any thing come infront

of car it will wirelessly give signal to nearest receiver.

We will use RF technology for this purpose.

RF remote control which is built using HT12E and HT12D chips.

The remote control is built using RF encoder chip HT12E that will

generate different codes. These codes will be transmitted by 434

MHz RF transmitter. At the receiving side these codes will be

received by 434 MHz RF receiver and decoded by RF decoder chip

HT12D.

In this project we show that how we design a RF information

transfer . In this project we use two RF module for wireless

data transfer.In this project we use 89s52 microcontroller as a

main processor.. This controller is basically a 40 pin ic. In this

project we use two sensor also.ROM of 89s52 is 8k and ram is

256 byte. We are using 16*2 lcd in this project. Lcd is

connected to port 0 which will display the no. of vehicle . we

are using counter in programming to show no. of accidents in

that area. So that solutions can be found out to avoid these

accidents. We will use buzzer to alert about accident on

receiver side. A rf tag transmitter will be provided to each

vehicle for vehicle identification. In case of any accident it will

transmit its ID. On receiver side RF module will give signal to

microcontroller. Microcontroller is decision maker here and

informer to person on duty.It will give data to LCD , buzzer and

LED’s. we will also use four LEDs to show accidents for

immediate action.

These sensor are connected to the port p3.4 and port p3.5

Pin no 40 is connected to the positive supply. In this project we

provide a 5 volt dc power supply. This power supply is truly

regulated power supply. Pin no 20 is connected to the negative

supply. Here we supply a negative voltage on this pin. Crystal

is connected to the pin no 18 and 19 of the microcontroller.

Crystal provide a clock signal to run the vehicle and process all

the internal requirement of the circuit. We use two sensor and

these two sensor are connected to the p3.4 and p3.5 of the

microcontroller.For the regulated power supply we use ic 7805

as a regulator to provide a fix 5 volt power supply.

In this project we will make a transmitter for RF data transmission.

Pin no 1of RF tx module is ground . second is for data , third for VCC

and fourth for antenna Transmitter

We transmitter whole project in few steps:RF transmitter

RF module Encoder circuit

RF receiver Rf receiver Decoder Microcontroller circuit Visual indication- LCD and LEDs Audio alert- buzzer

Block Diagram of receiver

MicroControllercircuit

5 v dc circuit

On/off switch

Ht 12 dDecoder chip

RFModeule

antennaLCD display16*2

BUZZER CIRCUIT

LED visual INDIACTION

12v DC supply

Block diagram transmitter

HoltekHt 12-Eencoder

RFModule TX

antenna

SensorAnd MCU

  Component List        S.No. Item Quantity Rate/Unit    

1 MCU 89C051 0 80  RF module 1 600  

  HT12E  1  35    HT12D        IC91214 1 25  

3 IC4049 0 25  4 IC8870 1 40  5 IC555 0 10  6 IC817 1 15  7 IC3021 0 15  

  Push to On Sw 3 12  8 SOLDERING WIRE 1 25  9 SOLDERING IRON 1 120  

10 FLUX 1 10  11 CONNECTING WIRE 1 50  12 TR548 2 2  13 TR558 0 2  14 RESISTENCES 20 0.5  15 CAPACITORS      

  1000µf 2 10    100µf 1 5    470µf 4 5  

16 DIODES 8 1  17 LED 8 1  

  Crystal 12MHz 2 25  18 IC BASE 3 5  

  IF set 120 1  19 IC 7805 Volt. Reg 2 15  

20 TRANSFORMER 9 V 1 30  21 SOCKETS 3 10  22 RELAY 9V 3 25  23 MILER CAP 5 3  24 CRYSTAL 3.579545 2 20  25 IC136 2 15  26 HOLDER 2 10  27 PLY BOARD 1 100  28 TAPE ROLL 1 10  29 Copper Clad Board 1 100  30 FeCl3 1 100  31 ZENER 0 3  

  Screws/bolt 2 2    Betteies 1 15    TOTAL COST        

Bibliography:

http://www.multyremotes.com/remote-robo-vehicle.htm