Wireless mouse DIY

The wireless mouse uses the coding and decoding circuit MC145026/MC145027 and the radio frequency transmitting/receiving module TDA1808/TDA1809 to cooperate with each other, and can flexibly control the mouse within a range of 10 to 120m. It can be seen from this circuit (see Figure 1 and Figure 2) that there is no need to modify the mouse or computer, and there is no need to install additional mouse driver software. As long as the selected components are normal, it can work without debugging, and all the functions of the original mouse can also be used. In normal use, it conforms to operating habits, is convenient and reliable, and is very suitable for DIY enthusiasts.
Under normal circumstances, there are 4 circuit connection lines inside the connection line between the mouse and the computer (the circuit device can accept up to 4 data lines for input, and readers can choose according to the actual situation of their own mouse), which are the positive pole of the power supply, the ground of the power supply, and the data line. 1. Data line 2. We cut the mouse connection, find these 4 lines respectively, and use the data transmission terminals D6 and D7 of the MC145026 encoding circuit to receive the data from the mouse data line 1 and data line 2, and encode it inside the chip through the radio frequency transmitting module TDA1808 is launched. After the radio frequency transmitting module TDA1809 works, it inputs the received coded information into the MC145027 decoding circuit. After conversion, the signals of the original mouse data line 1 and data line 2 are restored at the data output terminals D6 and D7 of the chip, and passed through the original mouse and The computer cable is fed into the computer.

Wireless mouse DIY