On Wed, 3 May 2006 22:41:27 +0200, "Ban" <bansuri@xxxxxxxxxxxx> wrote:
>> BestPair Voltage Divider Resistor Pair Picker now calculates results
>> 0.1%, 1% and 5% (E192, E96, and
>> E24) resistor value sets.
>> There are 480,000 different combinations of standard 1% resistor
>> values. If you need 2.75 volts from a
>> 5.00 volt reference, which of those 480,000 pairs will give you the
>> closest result?
>> For this example there are 9 resistor pairs that will get you to
>> 0.5%, but one resistor pair will
>> get you within 0.15%. Only 1 out of 480,000 combinations is the very
>> best pair!!
>> The Best Pair III resistor calculator program will calculate and
>> display the twenty one best voltage
>> divider resistor pairs, as well as the error voltages, percent error,
>> "Perfect R2" and "R Thevenin"
>> values. Results can be scaled to any decade of course.
>> If you are interested you can get it with instant download delivery
>> here -->
>I would use an 18k and a 22k and get 0% deviation
>or maybe a 2.2k and a 3.3k and get also 0%
should be 2.7k
>or a 8.2k and a 10k and get 0.1%
>all much better than your 480000 combinations.
>And there are 98 combinations already in the E96 series , that give you
>better than 0.5%
>How is that possible?
>Seem to be utter crap. Hint: I use a program called Rescad by Terry Harris