Back to start Calculation of parallel/series connections of 2 resistors series E24/E12

If a resistor is not available as a standard value in the basic series, the series connection of 2 resistors is offered.
 
Series E24: 10, 11, 12, 13, 15, 16, 18, 20, 22, 24, 27, 30,
33, 36, 39, 43, 47, 51, 56, 62, 68, 75, 82, 91
 
Series E12: 10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82
 
Possible resistor combinations can be calculated with this javascript using the selected series.

(1 Ω ... 10 kΩ)

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The idea for this calculation was created when reading the article in [1]. There, the calculation of the parallel connection of resistors is presented with an Excel file.
 
[1] Klaus Wollert, DL7KWB: miniRcalc zur Berechnung parallelgeschalteter Widerstände. Funkamateur 7/2016, S. 634-635