ข่าว
Building a 120 Volt AC Power Supply for 3 Volt DC Output
Author： ZYG Power Module Time： 2023-4-23
Introduction
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.
Conclusion
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.
ก่อนหน้า: วิธีต่อสายไฟ ac กับ dc
ต่อไป: วิธีสร้างแหล่งจ่ายไฟ AC-DC
ข้อมูลที่เกี่ยวข้อง
-
2023-4-12
How to Build an AC-DC Converter
An AC-DC converter, also known as a rectifier, is an electrical device that converts alternating current (AC) power to direct current (DC) power. This conversion process is essential for many electronic devices, as they require DC power to function properly. In this article, we will discuss the basic principles of building an AC-DC converter. The first step in building an AC-DC converter is to choose the right components. The most important components of an AC-DC converter are a transformer, a diode bridge, and a filter capacitor. The transformer is used to step down the AC voltage to a lower voltage that can be rectified. The diode bridge is used to rectify the AC voltage, which means that it converts the...
ดูรายละเอียด -
2023-6-19
LED Power Supply: Converting 12V AC to DC for Optimal Performance
As the world becomes more reliant on technology, there is a growing demand for efficient and reliable power supplies. One option that has gained popularity in recent years is LED power supplies, which convert 12V AC to DC for optimal performance. In this article, we will explore the benefits of LED power supplies and how they work. LED power supplies are specifically designed to power LED lighting systems, which have become increasingly popular due to their energy efficiency and long lifespan. However, LED lights require a constant DC voltage to function properly, which is not provided by the standard AC power supply found in most homes and buildings. This is where LED power supplies come in. The main function of...
ดูรายละเอียด -
2023-4-25
วิธีแยกความแตกต่างระหว่างแหล่งจ่ายไฟ AC และ DC
When it comes to powering electrical devices, there are two main types of power supplies: AC and DC. AC stands for alternating current, while DC stands for direct current. Both types of power supply have their specific uses and applications. It is important to differentiate between the two in order to choose the right type of power supply for your device. The main difference between AC and DC power supplies is the way that the electrical current flows. In an AC power supply, the current alternates back and forth in a sinusoidal pattern. This means that the current changes direction periodically. In a DC power supply, the current flows in only one direction, from the positive to the negative terminal....
ดูรายละเอียด -
2024-9-10
Charging Power Supply: Technical Core and Working Principle
With the rapid development of daily life and technology, charging power supply plays an indispensable role as a key device for energy replenishment. Whether it is the daily charging of portable electronic products such as smartphones and tablets, or the energy replenishment of high-performance equipment such as electric vehicles and drones, it is inseparable from the support of charging power supply. This article will explore the technical core and basic operation principle of charging power supply in depth, and take you to understand the mystery of this energy transfer process. 1. Basic concept of charging power supply In short, a charging power supply is a device that converts electrical energy into a form that can be received and stored by...
ดูรายละเอียด -
2023-9-19
Introduction: The DC-to-DC step-down adjustable power supply module is a remarkable technological advancement that has revolutionized voltage control in various applications. This module offers versatility and flexibility, making it an indispensable component in electronic devices. From powering small electronic circuits to driving motors and LEDs, this adjustable power supply module has found its way into many industries. In this article, we will delve into the features, applications, and benefits of this incredible power supply module. Features: The DC to DC step-down adjustable power supply module is equipped with numerous features that enable precise voltage control. One of its key features is the adjustable output voltage, which allows users to set the desired voltage value within a specific range. This feature...
ดูรายละเอียด -
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...
ดูรายละเอียด