此为自动量程切换频率计的设计，文件中有相关电路图，以及仿真结果，主要由单片机进行计数和控制，由keil c编写-This is an automated switching frequency range of design, documents related to circuit, as well as the simulation results, carried out mainly by the single-chip counting and control, prepared by

本数字频率计将采用定时、计数的方法测量频率，采用一个1602A LCD显示器动态显示6位数。测量范围从1Hz—10kHz的正弦波、方波、三角波，时基宽度为1us,10us,100us,1ms。用单片机实现自动测量功能。-The digital frequency meter will adopt the method of timing, counting measuring frequency, USES a model 1602 a dynamic LCD display 6 digits.