主控为STC89C52,共计4个LED用于流水灯功能,共计5个按钮 4个用于普通按键使用 1个用于复位按键,一个四位数码管,一个蜂鸣器,一个拨动开关用于下载冷启动一个USB转串口芯片用于串口下载程序时的电平转换,一个TYPE-C接口用于供电以及烧录程序。其中四位数码管的位选用三极管来做开关,由单片机控制,如果直接接单片机不可用,单片机引脚带负载能力较差。
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