The document describes a RFID-based system to ensure two-wheeler riders wear helmets. A transmitter is placed in the helmet that sends RF signals powered by a battery. A receiver on the two-wheeler is connected to a microcontroller and alarm. If the receiver does not detect the helmet's RF signals, the microcontroller triggers the alarm to notify the rider to wear a helmet before riding.

1. Protection system for two wheeler rider using
RFID based Helmet
Project Scenario:
Now a days people ignore to wear helmet while riding two wheelers. This may lead to high risk
when such a person met with an accident and lost their lives due to head injuries. We would have come
across a statement said by the doctors, “If he would have weared a helmet he would have been saved”.
So a helmet is necessary for two wheeler riders.
Project idea:
Our idea is to indicate the user that he should wear a helmet while riding using RFID.
Project Block diagram:
Helmet
Battery +5V Encoder RF
Regulator Transmitter
+9v HT12E
Two Wheeler
Battery +5V Decode RF
Regulator Receiver
+6v HT12E
PIC Alarm Alarm Unit
Microcontroller
Driver ckt

2. Project working:
A rf transmitter is fixed in the helmet which works on a battery. It keeps on sending code singals
through it.
A rf Receiver is fitted with the two wheeler with a alarm and a microcontroller unit. So when the
RF code is not received by the receiver, the microcontroller unit senses it, and it knows that the Helmet
is not nearer to the bike. So it gives an alarm to the user that he has to wear a helmet.
Block diagram Explanation:
Battery Unit:
Provides power supply for the electronic circuitary.
+5v Regulator:
Converts +9v dc to +5v dc for use with the encoder and rf transmitter units.
Encoder:
A encoder HT12E is used to generate a code to transmit.
RF Transmitter:
A rf transmitter converts the digital code to rf signals and transmits them in the air.
RF Receiver:
A rf Receiver converts the rf Signals from the air to digital code.
Decoder:
The HT12D Decoder decodes the digital data and sends it to the microcontroller for processing.
Microcontroller:
A PIC 16F877a Microcontroller is used to process the decoded data and send signals to alarm
unit if required.
Alarm Driver:
A microcontroller cannot drive a alarm directly. So a driver circuit is needed to signal the alarm.
Alarm:
A buzzer unit to indicate the used that he should wear a helmet in order to ride the bike.