RVal is a program for Electronic Engineers and hobbyists. It will find the nearest preferred resistor values satisfying certain criteria or all within a given tolerance, in whichever range of preferred values the user selects. All the standard value ranges are supported; they are E6, E12, E24, E48, E96 and E192. Preferred values can be selected according to the following criteria:
* The nearest preferred value to that specified.
* The pair of preferred values having the closest approximation to the required Ratio.
* The pair of preferred values having the closest approximation to the required Difference.
* Pairs of preferred values which, when placed in series or parallel provide the closest approximation to the required value.
* The preferred value required in parallel with an existing value to provide the closest approximation to the required value....
