蜂鸣器控制，本项目中包括两个设计，一个简单的buzzer控制，一个通过buzzer演奏乐曲“梁祝”的示例 -Buzzer control, this project includes two designs, a simple control buzzer, a buzzer play music through the
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001518s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001110s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001520s ]
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