ニュース
3 ボルト DC 出力用の 120 ボルト AC 電源の構築
著者: ZYGパワーモジュール Time: 2023-4-23
序章
When it comes to electronic devices, the power supply is an essential component that ensures the device receives the necessary power to operate correctly. In this article, we will discuss how to build a 120-volt AC power supply that provides 3-volt DC output.
Designing the Power Supply
Before we begin building the power supply, we need to design it first. The power supply consists of two main stages: the AC to DC conversion and voltage regulation.
AC to DC Conversion
To convert AC power to DC power, we will use a bridge rectifier. A bridge rectifier is a circuit that converts AC power into pulsating DC power. The circuit consists of four diodes arranged in a bridge configuration, hence the name. The output of the bridge rectifier is not a pure DC, but rather a pulsating DC voltage that varies between the positive and negative peaks of the AC voltage. To smoothen the pulsating DC voltage, we need to use a capacitor filter.
Voltage Regulation
After the AC to DC conversion, the output voltage still requires regulation to ensure that it provides a steady DC voltage. To control the output voltage, we will use a voltage regulator. A voltage regulator is a device that maintains a constant voltage level regardless of changes in the input voltage, load current, or temperature.
Building the Power Supply
Now that we have designed the power supply, we can begin building it. The schematic diagram for the power supply is shown in Figure 1.
Figure 1: Schematic diagram of the 120V AC to 3V DC power supply.
Materials
To build the power supply, you will need the following materials:
– 1 x 120V AC to 9V AC transformer (1A)
– 4 x 1N4007 diodes
– 1 x 2200μF/16V electrolytic capacitor
– 1 x LM7803 voltage regulator
– 1 x 0.1μF ceramic capacitor
– 1 x 10μF/16V electrolytic capacitor
– 1 x 3V LED
– 1 x 220Ω resistor
Step-by-Step Instructions
1. Begin by connecting the AC input of the transformer to the bridge rectifier. Connect the positive and negative outputs of the bridge rectifier to the positive and negative terminals of the capacitor, respectively.
2. Next, connect the output of the capacitor to the input of the voltage regulator. Connect the output of the voltage regulator to the 0.1μF ceramic capacitor, and then connect it to the 10μF electrolytic capacitor.
3. The output of the regulator should be 3 volts DC. Connect the anode of the LED to the output of the regulator and connect the cathode to the 220Ω resistor. Finally, connect the other end of the resistor to the ground.
Testing the Power Supply
Before connecting any load to the power supply, it is essential to test it first. Connect a multimeter to the output of the power supply and measure the voltage. It should be close to 3 volts DC.
結論
Building a 120V AC to 3V DC power supply is a simple and straightforward process. By following the steps provided in this article, you can create a reliable power supply that can power a wide range of electronic devices. Remember to take necessary precautions when working with electricity to avoid accidents.
関連情報
-
2023-7-5
Bidirectional DC-DC Converter: An Efficient Solution for Power Conversion
Introduction: Power conversion plays a crucial role in various applications such as renewable energy systems, electric vehicles, and energy storage systems. The bidirectional DC-DC converter has emerged as an efficient solution for power conversion due to its ability to transfer power bidirectionally between two DC voltage sources. This article aims to explore the working principle, advantages, and applications of bidirectional DC-DC converters. Working Principle: A bidirectional DC-DC converter consists of two unidirectional converters, namely the buck converter and boost converter, connected back-to-back. The buck converter steps down the input voltage, while the boost converter steps up the voltage. These converters are controlled by a high-frequency switching mechanism that allows energy transfer bidirectionally. During the step-down mode, the buck converter operates...
詳細を見る -
2023-5-3
AC-DC Power Supply: A Reliable Solution for Your Electrical Needs
An AC-DC power supply is a device that converts alternating current (AC) to direct current (DC) and is widely used in various electronic devices. It is a reliable solution for your electrical needs, providing a steady and stable source of power. In this article, we will discuss the features and benefits of an AC-DC power supply and why it is a popular choice among electrical engineers.One of the most significant advantages of an AC-DC power supply is its versatility. It can be used in a vast range of applications, including consumer electronics, medical equipment, industrial automation, and aerospace. The ability to convert AC to DC makes it an essential component in electronic devices, providing a reliable source of power, regardless...
詳細を見る -
2023-10-21
Computers have become an integral part of our daily lives. Whether it be for work, entertainment, or communication, we rely heavily on these machines to keep us connected and productive. However, one area that often goes overlooked is the power supply unit (PSU) – the component responsible for supplying power to the various components within the computer. That is why we are thrilled to introduce the revolutionary modular PC power supply, a groundbreaking solution for customized computer power management. Traditionally, power supplies in computers have been designed as a fixed unit, providing a set amount of power to all the components. This one-size-fits-all approach often leads to inefficiencies and wasted energy, as not all components require the same amount of...
詳細を見る -
2023-9-30
DC to DC Power Supply Module: Efficient and Reliable Energy Conversion Solution
Introduction In the modern world, the demand for efficient and reliable energy conversion solutions has never been higher. In various industries, such as telecommunications, automotive, and renewable energy, the need for stable and regulated power supply is critical. DC to DC power supply modules play a crucial role in meeting these demands by converting the input voltage to the desired output voltage with high efficiency and reliability. This article will explore the features, advantages, and applications of DC to DC power supply modules. Features of DC to DC Power Supply Modules DC to DC power supply modules possess several features that make them an ideal choice for energy conversion. These modules are compact in size, making them suitable for applications...
詳細を見る -
2024-11-22
New Energy High Voltage Power Supply: Efficient and Stable Green Power
As a core component in the field of new energy technology, new energy high-voltage power supply with its high efficiency and stability plays an important role in promoting the development of green energy. This power supply not only improves the energy conversion efficiency, but also reduces the loss in the energy transmission process, thus providing solid technical support for the widespread application of renewable energy. The original intention of designing new energy high voltage power supply is to meet the special requirements of new energy power generation technology. Compared with traditional power supplies, new energy high voltage power supply has significant advantages in voltage output. It can convert low voltage DC or AC into high voltage DC or high voltage...
詳細を見る -
2023-6-14
Power supply is an indispensable part in electronic devices. It provides the necessary power to run the device and is responsible for its proper functioning. In recent years, with the development of technology, the demand for power supplies has increased and manufacturers are constantly striving to provide more efficient and reliable power supplies. One such power supply that has gained popularity in the market is the DM Series DC DC Power Supply. The DM Series DC DC Power Supply is a high-performance power supply designed to meet the demands of today's electronic devices. It is widely used in various fields, such as telecommunications, medical equipment, military, aerospace, and industrial automation. The DM Series power supply is designed to provide stable...
詳細を見る