这是基于单片机自动量程的频率计的PPT，里面包含了方案的总体硬件框图，以及5V稳压电源电路的设计，以及以高频为10kHz、低频为800Hz的正弦波频率和方波频率两种频率信号进行比较-This is a microcontroller based automatic frequency range meter PPT, which contains a hardware block diagram of the overall program, as well as 5V power supply circuit design, as well as the high frequency of 10kHz, low-frequency sine wave frequency is 800Hz square wave frequency and two comparing the frequency of the signal