Hi,
I designed a charging unit. I want to charge 32 different sensors. I am using arduino nano to display charge status on each of its sensors. I do this as described below:
I use 4 different arduinos and they all have a common ground.
I determine the current according to the voltage passing over 1 ohm and I determine the charge state accordingly.
While doing this, the pins up to the A0-A8 pin, the charge GND of the sensor, and one leg of the 1 ohm resistor are common; The other leg of the resistor is on the common GND leg of both the system and the arduino.
My problem here is that although I see that the current value does not change when measuring with a multi meter, I am measuring the current value incorrectly that I read on the arduino when all the sensors are installed here. But this problem does not occur with fewer sensors. I need your help on why the problem occurs and how I can fix it.
I can retell for more information and unclear areas.
Kind regards,
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