To control the TH7195, the computer must send instructions, and the power supply will eventually send an answer.
为了控制TH7195，计算机一定要发送指令，而且电源最后将会送一个应答信号。
The main system USES 3.3v power supply module. Paper gives the detailed circuit design and instructions.
主系统采用3.3 V电源模块供电，论文中给出详细的设计电路及说明。
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