Voltage divider calculator – choosing resistors

Calculates the output voltage of a resistive divider or the missing value of R1 or R2. An optional load resistance can be taken into account, and the calculator also shows the current through the divider and the power dissipated in the resistors, which usually decides their power rating.

        VoltDivCalculator
      

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A voltage divider is rarely the whole job — it is usually part of a larger measuring chain. We design and build such circuits from the concept to an assembled board, using PIC and STM32 processors.