Biometric based secured real-time attendance system

Abstract:

It is every human responsibility to follow echo friendly systems as we know how our environment getting polluted. One of the echo friendly systems is avoiding paper usage as much as possible. This can be achieved easily with help of advancement in technologies.
Now a day’s so many technologies are coming out to make our lives more comfort, user-friendly and luxurious. In this project we are replacing current paper based attendance system with Biometric technology. This is a complete stand alone attendance system in which we store all students attendance with time and date in excel file which will be created on SD card using LPC2148 micro controller. The advantage of using fingerprint module is we can avoid false attendances. Because the person must present there to give his attendance and the mismatching ratio of fingerprints with another person is too high so there is no chance of giving attendance of others with same person. This finger print module support more than 100 users and we increase the user and also delete the users. The processing time for scanning one’s fingerprints is around 3 to 5 seconds only The advantage of SD memory card is we can store more data, the storage range is in Giga Bytes and the read and write time is too fast and we can create files in suitable formats. The communication between SD card and our controller is established using SPI communication. And the advantage of using LPC2148 micro controller is it has two inbuilt SPI serial interfaces and can communicate with high speed as it is 32 bit controller.

BLOCK DIAGRAM:

LCD [pic]

[pic] SD CARD SLOT

[pic]

Software Tools:

➢ KEIL IDE for developing micro controller code

➢ ORCAD for designing schematics

➢ FLASH MAGIC for dumping the hex file into controller

Hardware Tools: ➢ ARM7 based LPC2148 Micro controller.

➢ Finger print module

➢ SD card.

➢ 3.3v CMOS battery and 32.768 KHz crystal for inbuilt RTC chip of LPC2148.

➢ Regulated +3.3v and +5v Power supply.

Advantages:

➢ No need of a person to take attendance

➢ Safe and more secured

➢ No need of paper.

➢ Avoids wrong timings entries.

Applications:

➢ Useful for colleges, schools, offices, shops and industries

➢ Can be used for access control system

➢ Can be used for vehicle monitoring systems.

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Finger print module

SPI
Pins

32.768 KHZ CRYSTAL FOR RTC

MAX232

CRYSTAL
OSCILLATOR

RESET

LPC2148

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