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适用于 DIN 导轨托架安装的 110/220VAC 光隔离过零检测器模块,具有 3.3V ...
该模块检测交流电源的过零点,每次过零时输出1ms的3.3V或5V方波信号脉冲。 对于 50Hz 电源,该脉冲每秒发送 100 次。 这非常适合需要与交流电源精确同步的微控制器项目,例如控制三端双向可控硅开关元件以执行调光或加热器控制的相位角控制。 电路的交流侧 ...
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