On Fri, Aug 27, 2021 at 11:13 AM Thomas D. Dean <tomdean@wavecable.com> wrote:
On 8/27/21 8:09 AM, Thomas D. Dean wrote:
> I have a voltage divider I want to calibrate. I tried this by exchanging
> the resistors and measuring the resultant rfesistance.
>
> 1.6516 = 3.3 * R1 / (R1 + R2)
> 1.6484 = 3.3 * R2 / (R1 + R2)
>
> R1 is around 1005 ohms
> R2 is around 1003 ohms
>
> I think this is simple. But evidently, it is beyond me.
>
> Tom Dean
And, worse, I can not clearly state the problem: rfesistance = voltage.
I think that you are making it too hard.
Choose r1 say 1000
now calculate r2 from your first eq.
I get 998.06
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