Saturday 13 December 2014

Tool, algorithm or method to know which resistors to use for an equivalent resistance $R_T$?


Say I have to get a resistance \$R_{T}\$ and I have a bunch of resistors, \$R_1, R_2, \ldots, R_n\$.



Does there exist a tool, algorithm, or method that gets the resistance value closest to \$R_T\$ by connecting (one or more) of the resistors \$R_1, R_2, \ldots, R_n\$ in series, in parallel or a combination of those two? And how to connect those resistors to get that value? So not trial and error. :)


Thanks in advance.




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