What interface does the mouse used in microcomputers usually use?

The mouse used in microcomputers is generally connected to the serial interface of the computer host, but laptops mostly use USB interface mice.

Mouse generally has three interfaces, namely RS232 serial port, PS/2 port and USB port. The serial port is connected to the computer through a serial port, and there are two types of 9-pin interfaces and 25-pin interfaces; PS/2 is connected to the computer through a six-pin mini DIN interface; the USB port is plugged into the USB interface of the computer.

Mouses can be divided into mechanical mice and optical mice according to their different working principles.

The mechanical mouse is mainly composed of rolling balls, rollers and grating signal sensors. When the mouse is dragged, the rolling ball is driven to rotate, and the rolling ball in turn drives the roller to rotate. The photoelectric pulse signal generated by the grating signal sensor installed at the end of the roller reflects the displacement changes of the mouse in the vertical and horizontal directions, and then is passed through the computer program Processing and transformation to control the movement of the cursor arrow on the screen.

The optical mouse detects the displacement of the mouse, converts the displacement signal into an electrical pulse signal, and then controls the movement of the mouse arrow on the screen through program processing and conversion. An optical mouse uses a photoelectric sensor instead of a rolling ball. This type of sensor requires a special backing plate with a stripe or dot pattern.

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