说明：   此为简易的频率计，可测10hz到1Mhz的频率，通过整形电路测方波，三角波，正弦波，还具有自校功能，也可测周期，这个为自己做的仪器原理的课程设计，里面包含程序及设计报告。可方便大家的使用。测量误差《0.1
(This is a simple frequency meter, capable of measuring 10Hz to 1Mhz frequency, by shaping circuit measuring square wave, triangle wave, sine wave, also has the self checking function, also can be used to cycle, the principle of the instrument to do their own curriculum design, which contains the code and design report. To facilitate the use of. The measurement error "0.1 )