The wireless mouse uses the codec circuit MC145026/MC145027 and the RF transmit/receive module TDA1808/TDA1809 to cooperate with each other, and can flexibly manipulate the mouse in the range of 10 to 120 m. The circuit (see Figure 1, Figure 2) can be seen that this circuit does not need to change the mouse and computer, no need to install additional mouse driver software, as long as the selected components are normal, no need to debug to work, all the functions of the original mouse can also Normal use, it is in line with the operating habits, convenient and reliable, very suitable for fans to make DIY.
Under normal circumstances, there are 4 circuit cables inside the connection line between the mouse and the computer (the circuit device can accept up to 4 data lines input, the reader can choose according to the actual situation of the mouse): the positive power supply, the power supply ground, and the data cable. 1. Data line 2. We cut the mouse connection and find the four lines separately. The data transmission terminals D6 and D7 of the MC145026 encoding circuit accept the data transmitted from the mouse data line 1 and the data line 2, and are internally coded by the RF transmitting module. The TDA1808 is launched. After the RF transmitting module TDA1809 is working, the received encoding information is input into the MC145027 decoding circuit, and after the conversion, the signals of the original mouse data line 1 and the data line 2 are restored at the data output terminals D6 and D7 of the chip, and the original mouse is used. The computer cable is sent to the computer.
Wireless mouse DIY
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