Submitted by:-
Laxmikant Sharma
Hasrat Ali Khan
Deepak Dua
Rohit Goel

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ABSTRACT
The given project aims to display the working of a magnetic reed actuated position encoder employing a DTMF circuit. The magnetic reed are placed in a radial arrangement with an extremely small separation between the reed switches, on passage of any magnetic body over these switches the reeds come into contact thus actuating. the closure of a circuit.
Each reed switch is designed to correspond to a different set of DTMF
frequencies. Thus a Large number of tones each of them corresponding to a different switch position can be generated. Each of these switch actuations corresponds to a different Set frequencies generated through linear addition of two frequencies levels or tones which is extremely similar to the DTMF system used in telephones.
These tones are then modulated in FM transmitted over a wireless network received, decoded and converted back into corresponding switch positions to indicate the particular positions of tracked vehicle on LCD display unit.
1.1 INTRODUCTION
The given project aims to display the working of a magnetic reed actuated position encoder employing a DTMF circuit. The magnetic reed are placed In a radial arrangement with an extremely small separation between the reed switches or passage of any magnetic body over these switches the reeds come into contact thus actuating the closure of a circuit.
Each reed switch is designed to correspond to a different set of DTMF
frequencies. Each of these switch actuations corresponds to a different Set of frequencies generated through linear addition of two frequencies levels or tones. These tones are then modulated in FM transmitted over a wireless network received decoded and converted back into corresponding switch positions to indicate the particular position tracked vehicle on LED
display unit.
1.1.1OBJECTIVE
 To construct an encoder and decoder with FM transmitter and receiver respectively connected.
 To interfaced the FM receiver with decoder circuit.
 To identify the position of object placed in a remote area A,B,C,D, and E by RF control signal.
1.1.2 REQUIREMENTS
 Magnetic pass switch
 DTMF Encoder
 FM transmitter
 FM receiver
 DTMF decoder
 LCD