Liuliu smart car

The question requires the analysis of the problem
of making a smart car to light up the car lights, and realize the lighting control of the car lights through the mobile phone app; to avoid obstacles, the car can retreat and use a buzzer to buzz after detecting obstacles at a certain distance. Use rz7889 as the motor driver chip to complete the car's forward, backward, left turn, and right turn functions. Use the buzzer. Press the app button to activate and deactivate the buzzer . Set up five-way tracking to make the car drive along the  predetermined track. Diagram design description PCB design description Software description Notes 1. The input voltage of the buzzer is 5v, which causes the potential difference with the high level generated by the F8 port to be too small and cannot reach the transistor conduction voltage, so the schematic voltage should be changed. It is 3.3v, but since the actual thing made this time is 5v, in order to remain the same, there is no change in the schematic diagram. 2. The tracking module has a total of five channels, and the second channel is not installed, so the display light in the video is always constant. See appendix for demonstration video