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Illustration Circuit for a Voltage Divider

Voltage divider - Circuit
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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:\[ U_{\text{out}} = \frac{R_2}{R_1 + R_2} \, U_{\text{in}} \]