# Illustration Circuit for a Voltage Divider

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With a voltage divider you can, as the name already says, convert a voltage $$U_{\text{in}}$$ (here: input voltage) into a smaller output voltage $$U_{\text{out}}$$. Depending on the desired output voltage, resistors $$R_1$$ and $$R_2$$ must be selected appropriately.

How big the resistances have to be to get your desired output voltage, you can find out with the following formula:$U_{\text{out}} = \frac{R_2}{R_1 + R_2} \, U_{\text{in}}$