This paper serves a new technology for communication field. As we know that in this era many of the research is going on in communication filed . Main motto of the researcher is to reduce the interference and loss etc. In this paper we developed a circuit which can be helpful to sending the data via exiting wire line (220-230 AC) with very low power consumption and very low data losses in optimum cost. Yet we facing few problems in hill area where it is very tough to align the tower of transmitting signal (provided by the different service provider). As concern to cost it is not possible to install tower or repeater (cost of repeater is approx. 1000 $) everywhere in such type of area . It is possible to install such type of modem where it is not possible to send the data wirelessly or in high expenditure. We are sending the message signal via exiting power line. Communications over Power line is different than communication over existing networks (for example, UTP, STP, Fiber etc. )Power line communication previously tough medium for transmitting the data. Transmission over the AC line is difficult because of the impulsive noise and interference caused from many sources. Also, the power line is not constant over every time. But as in compared to the Ethernet cabling, which is clean and has consistent characteristics, the power line can have numerous appliances and equipment plugged in at any time we can turned on or off and run for any extent of time. In this paper the modem used is made by sunrom-1187 is based on much reduction in term of error in data reception. In this paper Transmission is based on byte by byte basis. For AC 50Hz system the zero crossing of AC signals happens every 10ms and modem needs 50 zero crossings to transmit one byte with error checking data. We can give the input with via mobile or keyboard. For security propose we can integrate this circuit with biometric system. We can send the data with keyboard, keyboard decoder decode the input and then it will connect to At mega 32 controller and then program it and simulated with ISP connector and then at last connect Power line Carrier Communication Modem system to the AC power plug. As a result circuit consist of 5 Volt Power supply, At mega 32 controller, ISP Connector, biometric system.

LCD PLCC Modem Biometric system