How To Convert 24 Volt To 12 Volt

6 min read Jun 26, 2024
How To Convert 24 Volt To 12 Volt

Converting 24 Volt to 12 Volt: A Comprehensive Guide


When working with electrical systems, it's not uncommon to encounter situations where you need to convert a higher voltage to a lower one. One common scenario is converting 24 volts to 12 volts. This conversion is crucial in various applications, such as automotive systems, solar power systems, and industrial control systems. In this article, we will explore the different methods of converting 24 volts to 12 volts, including the use of voltage regulators, resistors, and DC-DC converters.

Method 1: Using a Voltage Regulator

One of the simplest ways to convert 24 volts to 12 volts is by using a voltage regulator. A voltage regulator is an electronic component that maintains a constant output voltage, regardless of the input voltage. There are several types of voltage regulators available, including linear regulators and switching regulators.

Linear Voltage Regulator

A linear voltage regulator, such as the 7812, is a commonly used component for converting 24 volts to 12 volts. The 7812 regulator has three pins: input, output, and ground. To convert 24 volts to 12 volts, simply connect the 24-volt power source to the input pin, the output pin to the 12-volt device, and the ground pin to a common ground point.

Switching Voltage Regulator

A switching voltage regulator, such as the LM2576, is a more efficient alternative to linear regulators. Switching regulators use a high-frequency switching algorithm to reduce power losses and increase efficiency. They are suitable for high-power applications and can handle higher current outputs.

Method 2: Using Resistors

Another method of converting 24 volts to 12 volts is by using resistors. This method is known as a resistive voltage divider. The resistive voltage divider consists of two resistors connected in series, with the output taken from the midpoint.

Calculating Resistor Values

To calculate the resistor values, you need to know the input voltage (24 volts), the output voltage (12 volts), and the desired current output. The following formula can be used to calculate the resistor values:

R1 = (Vin - Vout) / Iout R2 = Vout / Iout

Where R1 and R2 are the resistor values, Vin is the input voltage, Vout is the output voltage, and Iout is the desired current output.


Suppose you want to convert 24 volts to 12 volts, with a desired current output of 1 ampere.

R1 = (24 - 12) / 1 = 12 ohms R2 = 12 / 1 = 12 ohms

Method 3: Using DC-DC Converters

DC-DC converters are electronic components that convert one DC voltage to another. They are available in various forms, including-module converters, brick converters, and chip converters.

Advantages of DC-DC Converters

DC-DC converters offer several advantages over voltage regulators and resistive voltage dividers, including:

  • Higher efficiency
  • Higher power density
  • Isolation between input and output
  • Adjustable output voltage

Choosing the Right DC-DC Converter

When selecting a DC-DC converter, consider the following factors:

  • Input voltage range
  • Output voltage range
  • Output current rating
  • Efficiency
  • Isolation voltage


Converting 24 volts to 12 volts is a common requirement in many electrical systems. There are several methods to achieve this conversion, including the use of voltage regulators, resistors, and DC-DC converters. Each method has its advantages and disadvantages, and the choice of method depends on the specific application requirements. By understanding the different methods of conversion, you can choose the most suitable solution for your project.