Wireless data logger using rf communication

1. AUTOMATIC STATION INDICATION SYSTEM FOR RAILWAYS
USING LCD/APR9600
ABSTRACT
With the title itself, one can understand that this project is exclusively used to
give the information of the forthcoming station to the passengers in the train. Most of the
passengers do not bother about the stations arriving until their destination station arrives.
There may also be chances like they miss their destination and has to get down at some
other station and go back to reach their destination. To get rid of this kind of problems,
we have designed a project “Automatic Station Indication System”.
This project uses wireless communication,RF. RF has the advantages of fast
communication for longer distances and reliability. The RF modules used here are STT-
433 MHz Transmitter along with an RF encoder HT12E, STR-433 MHz Receiver along
with an RF decoder HT12D.
Every station will be having the RF transmitter. The RF transmitter will be
interfaced to the controller through an RF encoder to encode the data received by the
controller and to transmit the data. Here in our project the RF transmitter continuously
transmits the predefined data. The RF receiver which interfaces the controller through an
RF decoder will be fixed in the train. Here the RF decoder is used to decode the signal
received by the transmitter. As the train moves and approaches the station, the RF
receiver present in the train will receive the information(predefined data) which is being
continuously transmitted by the transmitter and will pass the decoded data to the
controller so that the controller performs the predefined task of displaying the
corresponding data on the LCD. Thus the passengers can know the forthcoming station
and act accordingly. Here in our project APR9600 voice module will also be provided for
the audio indication of station arrival. It gives the audio output of the prerecorded voice
Head office: 3nd
floor, Krishna Reddy Buildings, OPP: ICICI ATM, Ramalingapuram,
Nellore www.pvrtechnology.com, E-Mail: pvrieeeprojects@gmail.com, Ph: 81432
71457

2. whenever required, as per the code logic. As this is the prototype we will consider 4 push
buttons as inputs for four different stations.
This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage
regulator is used for voltage regulation. Full wave bridge rectifier is used to rectify the ac
output of secondary of 230/12V step down transformer.
TECHNICAL SPECIFICATIONS:
HARDWARE:
Micro controller : AT89S52
Crystal : 11.0592 MHz
LCD : HD44780
RF transmitter : STT-433MHZ
RF receiver : STT-433MHZ
RF encoder : HT12E
RF decoder : HT12D
Voice module : APR9600
Switches
Power supply
Transformer : 12V step down
Filter : 1000uf/25V
Voltage Regulator : 7805
SOFTWARE :
Keil microvision
proteus
UC flash
APPLICATIONS:
Head office: 3nd
floor, Krishna Reddy Buildings, OPP: ICICI ATM, Ramalingapuram,
Nellore www.pvrtechnology.com, E-Mail: pvrieeeprojects@gmail.com, Ph: 81432
71457

3.  Railways
 Bus stations
BLOCK DIAGRAM:
TRNSMITTER SECTION:
Head office: 3nd
floor, Krishna Reddy Buildings, OPP: ICICI ATM, Ramalingapuram,
Nellore www.pvrtechnology.com, E-Mail: pvrieeeprojects@gmail.com, Ph: 81432
71457
Power
Supply
Power
Supply
8
0
5
1
8
0
5
1
RF Encoder
HT12E
RF Encoder
HT12E
RF
Transmitter
RF
Transmitter
Switch4Switch4
Switch3Switch3
Switch2Switch2
Switch1Switch1

4. RECEIVER SECTION:
POWER SUPPLY BLOCK DIAGRAM:
Head office: 3nd
floor, Krishna Reddy Buildings, OPP: ICICI ATM, Ramalingapuram,
Nellore www.pvrtechnology.com, E-Mail: pvrieeeprojects@gmail.com, Ph: 81432
71457
Step down
Transformer
Filter Regulator OutputBridge
Rectifier
8
0
5
1
8
0
5
1
Power
Supply
Power
Supply
RF Decoder
HT12D
RF Decoder
HT12D
RF ReceiverRF Receiver
LCD
DISPLAY
LCD
DISPLAY
APR9600APR9600
SpeakerSpeaker