Smart car based on 51 microcontroller

This is Yuezi, a first-year embedded novice. This sharing was designed for the end of last semester. If there are any mistakes, please give me some advice. If you have any questions, you can answer questions in the comment area
 
. 1. Description
(1) Smart car designed based on STC89C52 , switched to SMD packaging instead of the more common plug-in chip.
(2) The power interface uses the XT30 interface, and the burning interface uses the C port (it is recommended to change it to the M port).
(3) Use CH340C to burn the program, and the program can be programmed using the self-written car program for each module.
(4) The size of the board is tailor-made according to the smart car model (it can be continuously changed according to your own design ideas or requirements)
(5) The female pin headers are prepared for different working modules, and the board is marked with silk screen.
(6) Each work module needs to be designed by yourself. If there are any additions, please modify them by yourself.
"The world passed me by" I chose to wander alone