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Description: 频率计，测时法，测周法测量频率，555产生频率信号，利用单片机实现测量并显示在LED上-Cymometer measured when the law, measuring the frequency of testing weeks, 555 have a frequency signal, using SCM measurement and display in the LED on the
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Size: 1636352 |
Author: 魏德宝 |
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