Potentiometer Voltage

Thread Starter

IamConfused

Joined Oct 4, 2010
3
I am trying to calculate the voltage at the wiper of the potentiometer (where the multimeter is hooked up to). Its probably really simple, but I can't find much on it and getting frustrated.
 

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beenthere

Joined Apr 20, 2004
15,819
The series string with the pot is pretty simple. The other string that attaches in parallel at the one point makes it a bit more fun.

You could probably solve for the pot in one extreme, and then in the other. The voltage variation might turn out to be linear.
 

Jony130

Joined Feb 17, 2009
5,488
Vout = 15V / [ R3 || ( R1 + (1-a)R6 )] / [ (R4+R5)||(R2+ a*R6) ]

a = 0 for 0%
a = 0.5 for 50%
a = 1 for 100%

"||" = (R1*R2) / ( R1+R2)


 

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