The drawing I made during my graduation this year was originally meant to be made and then attached to the board, but it turned out that the cost was too high and it was inconvenient to be at home during the epidemic. The stm32 minimum system board and separate chip module purchased directly online later are used for control demonstration, controlling output signals and input signal acquisition. I'm a scumbag, but I stepped on it lightly. I just learned Protel, which is used in the electronic circuit CAD course, in my freshman year. Now I can experience the complete drawing process.
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