11pc396 finger print bike helmet
TRANSCRIPT
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title
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Introduction
Vehicle management system using Finger printsensor.
Also makes helmet wearing compulsory.
It also checks for fuel level; before making astart thereby preventing dry run in the middle.
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Block Diagram
PC
InterfacingPC
Voting Module
Microcontroller
Finger Print
Reader Relay Driver
LED
Indications
Fuel level sensor
Relay
Ignition Control
RF Decoder
RF Receiver
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Block Diagram
Helmet module
RF EncoderRF TransmitterPressure
Switches
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Microcontroller
PIC16F877A is the microcontroller used in theproject.
The controller has peripheral features like inbuiltADC, required to get the signals from the
sensors. Maximum clock frequency is 20MHz and hence
faster than 8051. Based on RISC and Harvard architecture and
hence even more faster. Embedded C is used for programming the
microcontroller.
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RF Transmitter and Receiver
In this project FSK modulated digital Rftransmitters are used.
The operating frequency of these modulesis 433MHz
These modules operate in the ISM band offrequencies and hence are license free.
These modules are used withaccompanying encoders and decoders.
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RF - Encoder and Decoder
These are used with the RF transmitterand receivers.
HT12E is the encoder IC
The decoder IC is HT12D
They encode and decode binary data into
a form that is used by the RF transmitterand receiver for communication.
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Level Sensing (Pressure)
MPX5010 is used for level sensing It is a linear pressure sensor. When a liquid
level varies, the pressure inside the tube alsovaries. This pressure is used for calculation ofthe level.
The output voltage is given by 0v to 5vdepending upon the pressure.
Integrated sensor in a simple 3pin package. It is fabricated using micro machined piezo
electric technology It is a integrated sensor and does not require
any signal conditioning The supply voltage input is 5V dc. The analog output from the pressure sensor is
directly connected to the ADC input.
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RS232 Interface
The serial/Comm port of the computer is usedfor communication with the hardware. The serial port of the computer uses RS232
standard for communication.
RS232 standard voltages are not compatiblewith conventional TTL / CMOS circuits. Hence IC MAX232 is used for voltage
conversion between RS232 port and themicrocontroller.
MAX232 enables full duplex communications,while doing the necessary voltage conversions.
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PC Application
A PC is used as the monitoring andcontrolling unit.
On the PC a visual basic program will be
used. VB is used because it offers an easy to
use and program graphical interface.
It is used to store all data and also tocontrol voting modules.
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Switching Circuit/Relay Drive
Relays are electromechanical switches that canbe controlled by ordinary digital pins.
But relays require more current than that can begiven by a microcontroller.
Hence a relay drive is required for currentamplification between the low current digitalcircuitry and the relays.
In this project a general purpose NPN transistor
is used for the relay drive. The transistor used is BC547, which is small
signal general purpose transistor.
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Fingerprint modules
FingKey is used as fingerprint scanner.
It is connected directly to the USB port ofthe computer.
Fingerprint SDK is the software used toget input of the fingerprint from thescanner to the PC.
It has 500 DPI(Dots per Inch) resolution.
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Hardware Components
PIC 16F877A microcontroller
Relay
Fuel sensor MAX232
Finger print reader
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Software Tools
MP Lab IDE for PIC programming
Orcad 16 for schematic design
Eagle layout Editor for PCB design VB for PC programming.
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Thank You