Re: Calculating resistor pairs to generate a range of voltages

Cool. What about resistorSeries.csv? Can you post it? Or is there a link to a source for it, you could share? I didn't find an obvious candidate on DigiKey.com. TIA!

One thing I find interesting about the results is that the table isn't symmetrical. Yes, the 1 and 254 results are symmetrical (same pair of values but in reverse order), but the 2 and 253 are not, and in general I guess they won't be.

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Re^2: Calculating resistor pairs to generate a range of voltages by GrandFather (Saint) on Feb 16, 2021 at 20:21 UTC
There is a "Download Table" button just above the table listing the components. I set "Results per Page" to 500 and downloaded two .csv files that I concatenated together (removing the header row on the second file). The result was a 500kB file. The algorithm generates 10 - 20 pairings for each target value which are then sorted by difference from desired value. Pairs with an error greater than a calculated threshold are eliminated. All the used resistor values are then counted and a selection process starts with the most frequently used resistor and matches all target values that has a pair using that resistor. It's entirely possible for different pairs to be found for each of a symmetrical pair of target values. Optimising for fewest key strokes only makes sense transmitting to Pluto or beyond	[reply]
Re^2: Calculating resistor pairs to generate a range of voltages by afoken (Chancellor) on Feb 16, 2021 at 18:49 UTC
What about resistorSeries.csv? Can you post it? Or is there a link to a source for it, you could share? I didn't find an obvious candidate on DigiKey.com. Probably just E series of preferred numbers, at 256 different voltages probably E24 or higher. Alexander -- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)	[reply]
Re^3: Calculating resistor pairs to generate a range of voltages by GrandFather (Saint) on Feb 16, 2021 at 20:33 UTC
Actually 0.1% resistors which cost about 3 cents each in x1000 quantities. Even one off they are only about 20 cents so the cost of precision resistors isn't really a barrier. Optimising for fewest key strokes only makes sense transmitting to Pluto or beyond	[reply]