Design for network card module of USB optical modem based on LED visible light communication

This paper designs a USB optical modem network card module based on LED indoor visible light communication. The design of the network card module includes LED modulation and reception circuit, USB interface circuit and level conversion circuit. This network card is connected to the computer's USB interface, can communicate with the LED lamp above. It can make the LED visible light communication application more flexible. This design is suitable for the full duplex data transmission of LED visible light communication, improve the data transfer rate of ordinary optical communication, also has the advantages of low cost, small size, easy to carry and install, etc.