用于通信行业领域，输出一些特定的脉冲波，如连续时间周期三角波、方冲脉波-For the communication industries, certain pulse output, such as continuous-time periodic triangular wave, square red pulse

基于51单片机的方波产生程序，汇编语言是C语言，能够稳定输出双路脉冲-Based on 51 single square wave generator, assembly language is the C language, dual pulse output can be stabilized

PWM方波控制风扇转速，很实用,下载了记得上传好东西-Square wave PWM control fan speed