自动区分笔记本电脑或台式电脑键盘类型，并自动敞开台式键盘数字指示灯，笔记本键盘则为关闭情况。
Laptop or desktop computer keyboard is distinguished, and automatically open desktop keyboard digital indicator lights, laptop keyboard is shut down.
之后LED开始作为指示灯出现在计算器和手表上，包括著名的Pulsar数字手表。
LEDs then began to appear as indicator lights in calculators and watches, including the famous digital Pulsar watch.
数字控制电路负责控制洗衣机的工作过程，主要由AT89S51单片机、两位共阴数码管、按键、蜂鸣器、LED指示灯组成；
Digital control circuit takes charge of controlling the working course. it consists of AT89S51, double-figured common-cathoded numeral display, buttons, buzzer, LEDs.
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