Webduino - 倒數計時器 ( Led 點矩陣 + 蜂鳴器 + 迴圈 )
Synopsis
透過Webduino Blockly，簡單實做出一個倒數計時器，由LED 點矩陣顯示倒數秒數，在倒數的過程蜂鳴器會發出聲音，倒數結束播放 ...
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