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  • When thinking about monitoring, I was initially going for Arduino or a like hardware. Compared to with Espruino, it is even more suitable to run the electronics from a battery. I like the built-in interrupt drivenness of Espruino, which helps with power conservation.

    From your implementation I understand that it is not enough to directly measure voltages over a sense resistor. The few millivolts differences would deliver a too course grain ramp of values. This fact is taken care of the current sense amps. And as an added benefit, the amps provide at the same time the galvanic separation.

    #current #sense #currentsense #opamp #adc #solar

  • correct, you get better accuracy if you amplify the current sense signal. for 10A current I would use a 0.01ohm resistor, which gives 0.1V voltage drop at 10A. then amplify the signal about 33 times to get better use of he full scale 3.3V input range of the ADC.


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