Programs calculate 1% and ratio-resistor pairs

Rutschow, Carl
December 2005
EDN;12/16/2005, Vol. 50 Issue 26, p66
Trade Publication
The article explores the idea of using computer programs to calculate all combinations of standard 1% resistors. Forming resistors of unusual values can be achieved by connecting two standard-value resistors of 1% tolerance in parallel. Visual Basic has the ability to check all standard 1%-resistor values in a given range. Like the Visual Basic, RPar2a.exe also checks and displays all standard 1%-resistor values. It calculates parallel combinatin values that fall within 0.1% of the desired value.


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