Voltage divider

Voltage divider is a electrical circuit which divides the input voltage. The output voltage is a portion of a input voltage and the value of the output is dependent of the resistors ratio in the circuit. The schematics on the right includes two resistor.

The output of the circuit is calculated by the following equation:

Electrical schematics of the voltage divider

U₂ = U₁ ⋅ (R₂ / (R₁ + R₂))

where:

• U₁ is input voltage
• U₂ is output voltage
• R₁ and R₂ are resistors

The equation is derived from Ohm's law

where:

I = U₁ / (R₁ + R₂)

and:

U₂ = I ⋅ R₂