# Voltage Divider Formula

### Monday, January 22 2007 @ 09:42 MST

**Contributed by: evilscientist**

For a given voltage divider:

To work out the output voltage Vo:

To work out the value of R1 for a particular Vi and Vo:

Where R1 and R2 are resistances in ohms and Vi and Vo are potentials in volts.

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Evilness

http://www.evilscientist.ca/article.php?story=20070122214203251