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Standard EIA Decade Values Table

Posted: Tue Jan 05, 2021 8:03 am
by mediatechnology
Standard EIA Decade Values Table

E6-E192 values.

Standard EIA Decade Values Table: https://proaudiodesignforum.com/images/ ... Table.html

Dark theme version: https://proaudiodesignforum.com/images/ ... Theme.html

Tables courtesy of logwell.com

Re: Standard EIA Decade Values Table

Posted: Thu Jan 07, 2021 3:05 pm
by flyboy71
Or if you wanna mess with math you can calculate the values using 10^(x/E) where E is the number of the tolerance family (i.e 24, 48 etc) and x is 0 to the max value of E. Then multiply the result by the decade of resistance (10,100,1k,etc). :geek:

I had to use this in a program I wrote once to calculate a bunch of network values or some parameteric sweep something or other. I believe this also works for inductors but not capacitors.

Re: Standard EIA Decade Values Table

Posted: Thu Jan 07, 2021 3:15 pm
by mediatechnology
I use this formula in spreadsheets to round values to E96.

This following calculates the E96 value of the contents of cell "E8".
=IF(E8<(ROUND(10^(INT(96*LOG10(E8))/96),2-INT(LOG10(E8)))+ROUND(10^(INT(96*LOG10(E8)+1)/96),2-INT(LOG10(E8))))/2,ROUND(10^(INT(96*LOG10(E8))/96),2-INT(LOG10(E8))),ROUND(10^(INT(96*LOG10(E8)+1)/96),2-INT(LOG10(E8))))
I forget the source for this formula - I used it in the THAT1510 gain spreadsheet here: https://proaudiodesignforum.com/forum/p ... 142&p=1160

Re: Standard EIA Decade Values Table

Posted: Thu Jan 07, 2021 9:40 pm
by flyboy71
That's a long formula. My eyes bled halfway through it. I was first introduced to the calculation by an Engineer when I was still plodding through my EE classes in college as a "did you know" moment.

This site shows my explanation but explains it a bit better: https://www.rfcafe.com/references/elect ... values.htm

Re: Standard EIA Decade Values Table

Posted: Fri Jan 08, 2021 6:24 am
by mediatechnology
That's a long formula. My eyes bled halfway through it.
That's why I always copy and paste that one. :D