Use lm358 to compare and control the sampling voltage. I use four 110n75, with a voltage resistance of 30V, and a current of 12v, which will blow up the multimeter (10A). I don’t know how high it can be. It is probably the dissipated power divided by the voltage. In addition, the sampling resistor It is also a current-limiting resistor and will generate heat, so please pay attention to heat dissipation.
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