This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

外部输入方波检测



已知外部输入方波频率为1kHz,如何对其的频率进行检测?判断其频率是否真的是1kHz?

谢谢!