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51MCUoutputPWMofthetwomethods
- 51系列单片机无PWM输出功能,可以采用定时器配合软件的方法输出。对精度要求不高的场合,非常实用。电路图见图一,采用了高速光隔(6N137)输出,并将PWM的信号倒相。-51 series no PWM output, the timer can be used with the software, the method output. On occasions, less precision, very practical. Circuit shown in Figure 1, using h