A C8051f330-based Network Walkie-talkie

Traditional voice communication tools, such as land lines and mobile phones, fullfills the basic need for voice communication. Nevertheless, they share a deadly weakness -- high cost.looking for a cheaper substitute,has become a heated issue.The emergence of web technology,has made it possible to develop internet-based software, providing quality-assured service,at a far lower price compared to traditional methods. However, users of these softwares have to wear wired headphones,thus restricted to the area near the computers,which bringing inconvenience.The internet-based voice communication is therefore impeded from moving towards the stage of wireless communication.The core issue of this topic is to transform the wired Internet-based Voice communication into short-distance wireless-network communication.A common solution is to adopt the embedded system.The internet-based handheld transceiver embedded with C8051F330 can successfully bring wired internet-based voice communication to a wireless stage.The ultimate aim of technological development, is to serve the ordinary people.Thus, throughout the design of the interphone system," Human Technology" has been adopted as guide line.Highly cost-effective components have been chosen as the central part of the system.The SOC type system C8051F330 has been employed as the microcontroller for the system, and its highly integrated feature,makes it unnecessary to add DA and AD converters,reducing the complexity of the system development.For RF module,the highly cost-effective RFM12A is adopted, successfully fulfilling the requirement of short-distance wireless voice communication.Therefore the selection of core components significantly reduces the price of the system,matching the needs of the ordinary people.The system has also brought into consideration the fact that most users are already in possesion of headphones,so no sound receiver nor speaker is included.This ensures the compatibility of the system.By simply plugging the headset to the according sockets on the interphone, an intact short-distance wireless voice communication system comes into being.