Hello,
How can I isolate the x, in this fraction? https://postimg.cc/xNV8665j
I am trying calculate the value of R2 through voltage divider (https://www.electronics-tutorials.ws/resistor/res10.gif)
I only need the value of the R2, because I have the value Vout, Vin and R1. This question is relative mathematic, I know, but I spend many hours try search about this theme around the web. (Actually, I do not even know how to search...)
Thanks
How about solving it from an electronics perspective, rather than an algebraic method?
You know V
IN, V
OUT and R1, therefore you can calculate the current through R1 using Ohm's law. The voltage across R1 is equal to the difference between V
IN and V
OUT, since potential differences are relative.
I = (V
IN-V
OUT)/R1
The current in both of the resistors is equal, since they're in series so R2 can be calculated using Ohm's law.
R2 = V
OUT/I
And there's your answer.
If you put both of the above equations together, no doubt you have a similar result to what one would have got using algebraic manipulation.