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Arduino 测量交流电流
2022-07-05 22:34:00 【姜戈12】

软件简单吧,就两行代码。
注意:串口波特率尽可能高些,这里用到2000000,以提高采样频率。
硬件也简单,任何一个有ADC的单片机比如 UNO 和 一个 “交流互感器模块”。
注意:是带运放的模块(右),交流互感器(左)输出原本是交流,负值部分单片机不方便采集。
图上波形为什么不是正弦波?这是一个显示器的电流波形,没问题,经过了示波器验证的,开关电源就这样的,换成阻性负载就会见到正弦波了。
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