My Major Project (RFID Based Toll Plaza System)

We  have  designed  project  for  the  automation  in toll  tax  payment  using  RFID. We have made the automation of toll plaza using combination of microcontroller, RFID and Load cell technology. 

This  report explains  the  implantation  of   automation in toll plaza  which  is  a  step  towards  improving  the  monitoring  of  vehicles, travelling  in  predetermine  routes. 

                   The  aim  of  our project is to  design  a  system ,which  automatically  identifies  an  approaching  vehicles  and record vehicles  number  and  time. If  the  vehicle  belongs  to  the  authorized  person, it  automatically  opens  the  toll  gate  and  a  predetermined  amount   is  automatically  deducted  from  its  account. This  translate  to  reduced  Traffic  congestion  at  toll  plazas and helps in lower  fuel  consumption. This is very important advantage of this system.

My Minor Project (DTMF Decoder)

Minor Project (DTMF Decoder)

This DTMF(Dual Tone Multi Frequency) decoder circuit identifies the dial tone from the telephone line and decodes the key pressed on the remote telephone. Here for the detection of DTMF signalling, we are using the IC MT8870 which is a touch tone decoder IC. It decodes the input DTMF to 4 digital outputs. The MT8870 DTMF (Dual Tone Multi Frequency) decoder IC uses a digital counting technique to determine the frequencies of the limited tones and to verify that they correspond to standard DTMF frequencies. The DTMF tone is a form of one way communication between the dialler and the telephone exchange. The whole communication consists of the touch tone initiator and the tone decoder or detector. The decoded bits can be interfaced to a computer or microcontroller for further application (For example, Remote control of home/office electrical appliances using a telephone network, Cell Phone controlled home appliances, Mobile phone controlled robot, etc.)