Voltage Divider Calculator

A voltage divider is a passive linear circuit that produces an output voltage that is a fraction of its input voltage. It consists of two resistors in series, creating a voltage drop across each resistor proportional to their resistance values.

The voltage divider works by creating a voltage drop across two resistors connected in series. The output voltage is taken from the junction between the resistors and is proportional to the ratio of the lower resistor to the total resistance.

The voltage divider formula is Vout = Vin × (R2 / (R1 + R2)), where Vout is the output voltage, Vin is the input voltage, R1 is the first resistor, and R2 is the second resistor from which the output is taken.

Voltage dividers are commonly used for signal level adjustment, bias voltage generation for amplifiers and active devices, voltage measurement, and creating reference voltages in electronic circuits.

Voltage dividers have high output impedance, are sensitive to load changes, consume continuous power, and can be affected by temperature variations in the resistors. They're best used with high-impedance loads.

Choose resistor values based on your desired output voltage ratio, acceptable power consumption, and output impedance requirements. Lower resistance values provide better load regulation but consume more power.

Yes, voltage dividers work with both DC and AC signals. For AC applications, consider the frequency response and use appropriate resistor types to minimize parasitic effects at higher frequencies.

Connecting a load changes the effective resistance of the lower branch, altering the output voltage. The output voltage will decrease depending on the load resistance compared to the divider resistances.