Welcome to the forum
Why did you start a topic in the Uncategorised category of the forum when its description is
DO NOT CREATE TOPICS IN THIS CATEGORY
Your topic has been moved to the Project Guidance category
What is that a diagram of ?
Details please
a presentation of kirchhoff's law
So what do you want the Arduino to do for you ?
could be used to measure the voltage drops across the resistors and display the results on the serial monitor?
which resistors? R3 or R1/R2/R3 ?
I assume you wish to enter the values of E1, R1, r1, E2, R2, r2and R3 use Kirchhoff's law to calculate I1, I2 and I3?
can you do the calculation on paper and use the equations to design your program
Hi,
OR use Excel spreadsheet?
Tom... 
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