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The trackball module adopts the BlackBerry trackball design and production, the module can be rotated by the roller movement of the X and Y direction of the rotary axis, through the fixed in the rotation of the rotary axis of the multi-pole magnet magnetization, the corresponding SMD Hall components to send a signal, in order to determine the trajectory of the movement.A small SMD switch is also designed underneath the trackball, which is convenient for the user to trigger an event or click "Select.

Features:
1.VCC uses 3.3V or 5V power supply
2.The four directions of up, down, left and right and the button in the middle can be combined for identification.
3.Four types of LED lights, red, green, blue and white, can be controlled separately
4.Product size: 20* 28mm

Instructions for use:
1. Connect to the development board through the 11pin header.
2. UP (upper), DWN (lower), LEF (left), RHT (right), BTN (middle button). These 5 pins serve as key inputs and are connected to the microcontroller
3.RED (red), GRN(green), BLU (blue), WHT(white).These 4 pins are used as the output of the microcontroller.The high-level light is off and the lo