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.
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