# Voltage Divider - Uses - Types

A voltage divider is a simple electrical circuit that can be used to reduce the magnitude of a voltage applied to a load. It consists of two resistors connected in series, with the load connected across the connection between the two resistors. The output voltage of the circuit is equal to the voltage drop across the second resistor.

## Principle Behind The Voltage Divider

The basic principle behind the voltage divider is Ohm's Law, which states that the current flowing through a resistor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the resistor. By using two resistors in series, we can create a voltage drop across each resistor that is proportional to the resistance of each resistor. The voltage drop across the first resistor will be higher if it has a higher resistance, and the voltage drop across the second resistor will be higher if it has a lower resistance.

## Uses

There are several reasons why we might want to use a voltage divider. One common application is to reduce the voltage applied to a load that is sensitive to high voltages. For example, a voltage divider can be used to reduce the voltage applied to a sensitive electronic device, such as a microcontroller, to a safe level.

Another reason to use a voltage divider is to create a reference voltage for a circuit. By selecting the values of the two resistors in the voltage divider, we can create a specific output voltage that can be used as a reference voltage for other components in the circuit. This can be useful for maintaining a stable voltage level in a circuit, even if the input voltage changes.

One important thing to consider when designing a voltage divider is the power dissipation of the resistors. The power dissipation of a resistor is the amount of heat that is generated by the resistor when current is flowing through it. If the power dissipation of a resistor is too high, it can cause the resistor to become hot and potentially fail. To ensure that the resistors in a voltage divider do not become too hot, it is important to select resistors with a high enough power rating.

There are several ways to calculate the output voltage of a voltage divider. The most common method is to use the voltage divider formula, which is:

Output Voltage = (Resistor 1 / (Resistor 1 + Resistor 2)) * Input Voltage

This formula can be used to calculate the output voltage for any values of resistor 1, resistor 2, and input voltage.

It is also possible to use a voltage divider to create a voltage that is greater than the input voltage. This is known as a "boosted" voltage divider, and it can be achieved by using a transformer to step up the voltage of the input voltage. The output voltage of a boosted voltage divider will be equal to the turns ratio of the transformer multiplied by the input voltage.

In conclusion, a voltage divider is a simple but useful electrical circuit that can be used to reduce the magnitude of a voltage applied to a load, create a reference voltage, or boost the input voltage. It is important to consider the power dissipation of the resistors in a voltage divider to ensure that they do not become too hot and fail. By using the voltage divider formula, it is possible to calculate the output voltage of a voltage divider for any values of resistor 1, resistor 2, and input voltage.