Bridge voltage calculation - conclusion!!!
Thanks for the input on this one. For your info, after some headscratching and a lot of paper, here's
the best answer I've got to, and verifed correct with Excel
<use fixed pitch font>
Given a bridge : Vin
+----|--- Vout (differential)
Calculate Rx given V, V=Vout/Vin
Rx = ------------------
For my case, where R1=R2, we can also say R2=R2=1 as R3 and Rx can be
scaled to compensate.
This then simplifies to
Rx = -----------
And can be coded as
..which shouldn't take too much code, even in C! - any improvements
Now to figure out where all the fixed points need to go...!
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