Formula for unbalanced bridge Rx-> V - take 2!
Oops - mixed up Rx and R2 - let's try again...
| +-- Vout
Treating each side as a potential divider : Vout = Vin(R3/R3+R1) - Vin(Rx/Rx+R2)
Vout = Vin((R3/R1+R3) - (Rx/Rx+R2))
We want the answer for Rx given the Vout/Vin ratio- call this ratio V,
so this becomes :
V = (R3/R1+R3) - (Rx/Rx+R2)
..and this is where my algebraic ability grinds to a halt..!
So the question is how do you juggle this to get either :
Rx = function_of(V)
Or (better, if possible)
Rx/R3 = function_of(V)
..and can it be simplified further if R1=R2 ?
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