Abstract: Through the study of PS-2 keyboard interface communication protocol and Wireless USB technology, a method is proposed to set a wireless transmitter on the wired keyboard of PS-2 interface and a USB interface receiver on the PC host to convert the original wired keyboard into a wireless keyboard. The hardware design, wireless communication protocol and software design of the wireless transmitter and USB interface receiver are described in detail in this paper. The PS-2 keyboard of IBM KB-2961 is modified to realize the wireless function of all keys. The transmitter and receiver of this keyboard make full use of the original wired keyboard and save resources, while realizing the wireless function of the keyboard. If the user\'s existing wired keyboard is modified, it has a high promotion value in the market.
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