Potential Divider

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The output voltage from a potential divider can be calculated as

V_out = V_in R₂ / (R₁ + R₂)          (1)

where

V_out = output voltage (V)

R = resistance (Ohms, Ω)

V_in = input voltage (V)

Example - Potential Divider

The output voltage from a potential divider with two resistors R₁ = 10 Ohms and R₂ = 20 Ohms, and input voltage 12 V can be calculated as

     V_out = (12 V) (20 Ω) / ((10 Ω) + (20 Ω))

        = 8 (V)

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