Radio Frequency Identification (RFID) is a new generation of Auto Identification and Data collection technology using radio waves. RFID based Digital Library Management system (DLMS) would allow fast transaction flow for the library and will prove immediate and long term benefits to library in traceability and security. The system is based on UHF RFID readers, supported with inductor coil at gate and transaction sections, and library cards(Student Id card) containing RFID-transponders which are able to electronically store information. This paper presents the experiments conducted to set up RFID based Library management system.

Component:
1. Atmega328p

2. LM7805

3. RFID card(125kHz) ,

4. RFID reader(RDM6300) ,

5. Arduino UNO

6. Battery (9 volts),

7. Crystal oscillator (16MHz) for Atmega328p ,

8. buzzer ,

9. LED (green),

10. Inductor coil ,

11. Resistor (100 ohms ) .

 

Code: CODE1     CODE2

Working Principle:
 

RFID reader will create a magnetic field . If we see deeply in the rfid card, then we can see a coil inside the card and a chip which contain a specified code. The card can not energize its coil by itself alone .It receives the induction created by the rfid reader . Then a will flow in the chip . Using microcontroller we can read the code behind the card . We note down the code . Here we use four sample rfid card. We saved the two card’s code in the array of the program. If we hold the card near the reader ,then the reader reads the code and microcontroller compares the code whether the code is in the array or not .If not it will buzz the buzzer i.e. the incomer has not membership in the library. If any person has membership , the green light will lit.

Projects

10:45 PM

Nowadays, controlling the traffic becomes major issue because of rapid increase in automobiles and also because of large time delays between traffic lights. So, in order to rectify this problem, we will go for density based traffic lights system. In this system, we will use IR sensors to measure the traffic density. All the sensors are interfaced to the microcontroller. Based on these sensors, controller detects the traffic and controls the traffic system. 

Component:
1) LED 12pcs
2) Resistors 4pcs (10 kilo ohm)
3) Resistors 15pcs (330 ohm)
4) Atmega8
5) Potentiometer 4pcs
6) IR 4 pair
7) Battery 9v
8) Transistor BC547

9) Voltage divider (9v-5v)     

IR Sensor Circuit Arrangement

Connection Diagram:

Proteus Implementation for Simulation

Microcontroller Code: Click Here

Working Principle:

For implementation purpose four junction road is chosen to set up the system. Four IR sensor is set on the four roads to measure the density. The IR sensors work like a switch that made with IR and BJT ( BC547). Whenever traffic jam occurs the receiver of IR sensor do not get emitters ray and the signal passes through the Microcontroller. In this set up ATMEGA8 Microcontroller is used. The program is set on the microcontroller for different logics like:

a) When density is low or hgh in all roads the traffic signals run on normal way.

b) When any one road’s density is high and others are free then only that road will show green signal.

c) When any two roads are highly densed then the green signal only run on those two roads in a particular time delay and the others will remain on red signal.

d) c) When any three roads are highly densed then the green signal only run on those three roads in a particular time delay and the other one will remain on red signal.

Projects

10:01 PM