本内容遵循CC 4.0 BY-SA版权协议 很多人第一次接触Arduino做LED控制，做的都是“点亮一颗灯”的实验——数字口给个HIGH，灯亮；给个LOW，灯灭。这个阶段没什么门槛，接线也简单，一颗LED串一个限 ...
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