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[edit] Resistor Picker Software

Calculates optimal stock values to use in a resistor string. Sorts output via Total percentage error of the outputs or Total Voltage error. Switches between 5% and 1% stock values. Setting for number of matches to calculate. Tests all permutations of appropriate values.

[edit] Sample output

   **********************************************************************
   **********************************************************************
   Tried 7962624 combinations (some redundant).
   ---------------------------------------------------------------------------------------------------------------------------
   R1= 220 R2= 180 R3= 100 R4= 300 R5= 200
   Eout1: Target= 2.2 Actual= 2.2 Center Error= 0V(0%) Eout Range= 2.31 to 2.09
   Eout2: Target= 4 Actual= 4 Center Error= 0V(0%) Eout Range= 4.2 to 3.8
   Eout3: Target= 5 Actual= 5 Center Error= 0V(0%) Eout Range= 5.25 to 4.75
   Eout4: Target= 8 Actual= 8 Center Error= 0V(0%) Eout Range= 8.4 to 7.6
   Total errors 0V(0.00%) record=9
   ---------------------------------------------------------------------------------------------------------------------------
   R1= 240 R2= 200 R3= 110 R4= 330 R5= 220
   Eout1: Target= 2.2 Actual= 2.1818 Center Error= 0.0182V(0.83%) Eout Range= 2.291 to 2.073
   Eout2: Target= 4 Actual= 4 Center Error= 0V(0%) Eout Range= 4.2 to 3.8
   Eout3: Target= 5 Actual= 5 Center Error= 0V(0%) Eout Range= 5.25 to 4.75
   Eout4: Target= 8 Actual= 8 Center Error= 0V(0%) Eout Range= 8.4 to 7.6
   Total errors 0.0182V(0.83%) record=10
   ---------------------------------------------------------------------------------------------------------------------------
   R1= 1.1K R2= 910 R3= 510 R4= 1.5K R5= 1K
   Eout1: Target= 2.2 Actual= 2.1912 Center Error= 0.0088V(0.4%) Eout Range= 2.301 to 2.082
   Eout2: Target= 4 Actual= 4.004 Center Error= 0.004V(0.1%) Eout Range= 4.204 to 3.804
   Eout3: Target= 5 Actual= 5.0199 Center Error= 0.0199V(0.4%) Eout Range= 5.271 to 4.769
   Eout4: Target= 8 Actual= 8.008 Center Error= 0.008V(0.1%) Eout Range= 8.408 to 7.608
   Total errors 0.0406V(1.00%) record=2

Download is here: http://xtronics.com/Resistor1.00.exe

Install requires password = "kelvin" Free - but don't call or write for support