This paper is a design of carrier communication module ,aiming at low-voltage power line carrier.
the core of the module is Microcontroller to STC12C5A32S2,include display module, RS232 connector circuit, modem chip ST7540 sending, receiving module, filter coupled module,button module,power supply module and so on . first Microcontroller receive data by the computer ,then Through the modem chip ST7540 , the data received from the Single -Chip Computer will be used to modulate. Then put the signal which from the modulated carrier coupl to the power line through the magnetic .Receiver module demodules signal which is from the power line carrier ,then transmit the data to the Single -Chip Computer. Single -Chip Computer show the data through the LCD display , to finish the transceiver of the power line carrier.
Keywords:Power Line Carrier,Single-chip Microcomputer,St7540, Lcd;Moden