Voltage Divider Resistor Picker

Save the 5$ and comparable software for free :

goto :

and download :

Rene

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...then there's the old standby by Terry Harris at RSW's site (Nearest; Series; Parallel; Divider): http://72.14.207.104/search?q=cache:ULaUZ9H9IGQJ:

Updated :-

"It now supports E192 range and supports selection from mixed ranges. It no longer rounds input values to 3 significant digits. It can run multiple instances (which is more a bug than a feature)."

at

Yes - Please download and try the free program.

If you find you do not like it please take a closer look at BestPair II -->

In seven years BestPair I had ZERO unsatisfied users.

You get what you pay for.

Thanks for looking.

Cheers, Tim

The number of times that I've had to select values from a range like that, I've done it "by hand" with a spreadsheet. ;-)

Although, it would be kind of a fun programming project - maybe I'll put up a "divider calculator" web page. ;-)

Cheers! Rich

Like these?

If they are 1% resistors, then NO pair will be within 0.15% !!!

Mark

Typically 1% resistors are within 0.15% or so.

Nothing wrong with trying to get closer to the ideal values on analog stuff.

Best regards, Spehro Pefhany

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This isn't unqualifiedly true. Some pairs MAY be within 0.15%; some may not. What you want to say is that there is no guarantee that any particular pair will be within 0.15% when built with real 1% resistors.

Thoses calculators are great but where can I find a list of commercially available resistances ? Thanks :-)

Googling revealed a nice web page at

In general, resistors are available in various series depending on the tolerance. The values repeat in each decade, and the tighter the tolerance, the more values in the series. For instance, the 20% series contains 10R,

15R, 22R, 33R, 47R, 68R, and then in the next decade 100R, 150R, ... and so forth. These days, one mostly finds 1% and 5% resistors. Technically the 1% series has different values than the 5% series (for instance, the 5% series contains the value 2.2, where 1% contains 2.21), but some manufacturers make the 5% series values available in 1% tolerance for the sake of continuity with older designs.

Any distributor's catalog will list resistance values. For instance, in Mouser's current catalog, take a look at

My fav:

A backup:

(Assuming you can get them to display in your browser; neither of these turkeys knows how to construct a proper HTML page.

763 errors 764 errors) . . BTW, when you respond, it's OK to delete 18 of the previous 19 blockquotes in the thread

--and to trim out anything which YOU aren't addressing.

Thanks :-)

Nice one Thanks !