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我想用mcu 去监测照明端的电流大小,该如何实现?

Other Parts Discussed in Thread: LM324

如附件线路,目前是使用lm324 想将变化的电流转化为电压,然后将电压送到MCU 端口,可是op输出总是op 的VCC 电压? 回路失败?还是有另外的方式去实现?