news
Building a 120V AC to 3V DC Power Supply
Author： ZYG Power Module Time： 2023-4-18
Introduction:
A power supply is an essential component in any electrical or electronic system. It provides the necessary power for the system to operate. In this article, we will discuss how to build a 120V AC to 3V DC power supply. The power supply can be used for a variety of applications such as powering low voltage circuits, charging batteries, and powering small electronic devices.
Design:
The power supply is designed to convert the 120V AC voltage from the mains into a 3V DC voltage. The power supply consists of a transformer, a bridge rectifier, and a voltage regulator.
Transformer:
The transformer is used to step down the 120V AC voltage to a lower voltage suitable for the power supply. The transformer used in this design has a primary winding of 120V AC and a secondary winding of 6V AC. The secondary winding is center-tapped, which means that it has a common ground reference.
Bridge Rectifier:
The bridge rectifier is used to convert the AC voltage from the transformer into a DC voltage. The bridge rectifier is made up of four diodes that are arranged in a bridge configuration. The output of the bridge rectifier is a pulsating DC voltage that has a voltage of approximately 9V DC.
Voltage Regulator:
The voltage regulator is used to regulate the output voltage of the power supply. In this design, a LM317 voltage regulator is used. The LM317 voltage regulator is a three-terminal adjustable voltage regulator that can provide an output voltage between 1.25V and 37V. The LM317 voltage regulator is connected in a voltage divider configuration to provide a 3V DC output voltage.
Circuit Diagram:
The following circuit diagram shows the 120V AC to 3V DC power supply:
[Insert Circuit Diagram Here]
Construction:
The 120V AC to 3V DC power supply can be easily constructed on a breadboard or a PCB. The components required for the power supply are:
1. Transformer: 120V AC to 6V AC center-tapped transformer
2. Bridge Rectifier: 4x 1N4007 diodes
3. Voltage Regulator: LM317
4. Capacitors: 1x 2200uF electrolytic capacitor, 1x 0.1uF ceramic capacitor
5. Resistors: 2x 220 ohm resistors, 1x 240 ohm resistor
6. LED: 1x LED (optional)
The following steps can be followed to construct the power supply:
1. Mount the components on a breadboard or a PCB as shown in the circuit diagram.
2. Connect the 120V AC input to the primary winding of the transformer.
3. Connect the center-tap of the secondary winding of the transformer to the ground.
4. Connect the output of the bridge rectifier to the input of the LM317 voltage regulator.
5. Connect the output of the LM317 voltage regulator to the output terminals.
6. Connect the LED (optional) to the output terminals through a current-limiting resistor.
Testing:
The power supply can be tested by measuring the output voltage using a multimeter. The output voltage should be approximately 3V DC. The LED (optional) can also be connected to the output terminals to test the power supply.
Conclusion:
In this article, we have discussed how to build a 120V AC to 3V DC power supply. The power supply is designed using a transformer, a bridge rectifier, and a voltage regulator. The power supply can be used for a variety of applications such as powering low voltage circuits, charging batteries, and powering small electronic devices. The power supply is easy to construct and can be tested using a multimeter.
relevant information
-
2022-10-11
Get the Best AC-DC Converter Manufacturer for Your Product
Looking for a reliable AC-DC converter manufacturer? One stop shop is your best choice! In our factory, we offer a wide range of products to meet your needs, from small to large. What is an AC-DC converter? An AC-DC converter is a device used to convert alternating current (AC) to direct current (DC). This is important because most devices require DC power to operate. There are many different types of AC-DC converters, each with their own advantages and disadvantages. Some common types of AC-DC converters include transformers, switching converters, and linear converters. What are the different types of AC-DC converters? There are many different types of AC-DC converters. The most common one is a buck converter. A buck converter is...
View details -
2023-9-16
Efficient and Versatile: Introducing the 850W Modular Power Supply
Having a reliable and efficient power supply is crucial for any computer system. Whether you are a casual user, a professional gamer, or a content creator, you need a power supply that can deliver consistent and clean power to support your demanding tasks. Introducing the 850W Modular Power Supply – a versatile solution that meets the needs of even the most power-hungry systems. One of the standout features of the 850W Modular Power Supply is its impressive efficiency. With an 80 Plus Gold certification, it offers up to 90% efficiency, meaning that less power is wasted as heat. This not only helps to reduce your electricity bills but also ensures that your components are being supplied with stable power, resulting...
View details -
2023-7-11
AC-DC Power Supply: Providing Efficient and Reliable Electricity Conversion
In today's modern world, electricity is an essential part of our daily lives. It powers our homes, offices, and industries, providing us with the energy we need to carry out various activities. However, the electricity we receive is not always in the form that we can use directly. This is where AC-DC power supplies come into play. They play a crucial role in converting the alternating current (AC) we receive from the power grid into direct current (DC) that is suitable for powering electronic devices. An AC-DC power supply is a device that takes in AC power and converts it into DC power with the desired voltage and current levels. It is commonly used in various applications, ranging from small...
View details -
2024-3-26
AC DC power module easily solves power supply problems
Speaking of power supply issues, everyone may have had a headache, right? If your mobile phone suddenly runs out of power or your TV screen suddenly goes black, these may be caused by unstable power supply. However, with the AC DC power module, these problems are no longer a problem! A good helper for electronic products Do you often worry about the battery of your mobile phone or tablet? With AC DC power modules, these are not a problem. It is like an "energy converter", turning the AC power at home into the DC power that electronic products like. It not only charges quickly, but also allows the device to run more stably. Moreover, with it, your device can...
View details -
2023-11-17
In the world of computer hardware, power supply units (PSUs) play a crucial role in ensuring the smooth operation of a PC. As technologies advance and computer components become more powerful, the demand for efficient and reliable power supplies has also increased. One solution that is gaining popularity among PC users is modular power supplies. A modular power supply is a type of PSU that allows users to connect and disconnect cables as needed. Unlike traditional power supplies, which come with a fixed set of cables, modular power supplies provide flexibility and customization options. This means that users can choose to connect only the cables they need, reducing cable clutter inside the PC case and improving airflow. One of the...
View details -
2023-7-17
Why Choose AC DC Power Supply SF Series
The AC DC Power Supply SF Series is a cutting-edge technology that offers efficient and reliable power solutions for various industrial applications. With its advanced features and high performance, this power supply series has become a popular choice among professionals in the field. One of the key highlights of the AC DC Power Supply SF Series is its versatility. It can seamlessly switch between AC and DC power sources, providing flexibility and convenience for users. This means that it can be used in a wide range of applications, from telecommunications and data centers to industrial automation and renewable energy systems. Another notable feature of the SF Series is its high efficiency. It is designed to deliver maximum power output while...
View details