关键词 AT89C51 单片机;语音芯片;通信DTMF ;解码
Abstract
With the development of scientific technology,an increasing number of home appliances have come into people's daily lives. These home appliances have brought in much convenience and enjoyment to people's life. The function of telephones will be further utilized and developed along with the popularization of telephones. Home appliances will probably be controlled by the telephone using the remote control technique in the future.
This paper gave an introduction of such a device, a phone control of home applicances based on AT89C51 SCM. The device took advantage of the DTMF telephone, which was used to handle the operation of the home applicance. It was a kind of long-distance intelligent controller based on the DTMF signal with multiple functions, such as shake-bell examination,pick-up simulation,DTMF signal demodulation,hang-up after no-answer for 113 seconds,etc.
A telephone remote controller based on AT89C51 single chip computer was designed in this paper,while the modules principles and circuit s in the controller was mainly introduced. It used the existing telephone line for communication without laying line again and without the limit of communication distance. In fact, the controller showed its great advantages in the practical application, such as a high reliability and applicability but a low cost and easy operation. Therefore, the device could be applied to communities in the city and its well worth doing so.
Keywords:AT89C51 single chip computer;phonic-chip;communication DTMF ;decode