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
-
2024-4-10
DC-DC power module: a new choice for efficient and stable power supply
Today, as electronic equipment becomes increasingly popular, the stability and efficiency of power modules have become the key to ensuring the normal operation of equipment. DC-DC power modules have gradually become the new favorite in the market due to their high efficiency and stability. It can not only provide reliable power supply for communication equipment, industrial automation, medical equipment, aerospace and other fields, but also show excellent performance in extreme environments. Next, we will delve into the application advantages of DC-DC power modules in various fields and reveal why they can become a new choice for efficient and stable power supply. Applications in communication equipment In the field of communications, power supply stability is crucial to ensuring signal transmission quality...
ดูรายละเอียด -
2022-9-14
เมื่อใดควรเลือกผู้ผลิตแหล่งจ่ายไฟ AC-DC และข้อดีของการเลือกแหล่งจ่ายไฟ AC-DC คืออะไร
ข้อกำหนดในการบรรจุโมดูลไฟ AC DC การเติมและการปิดผนึกโมดูลไฟ AC DC เป็นสิ่งสำคัญมาก กระบวนการนี้ไม่เพียงแต่เกี่ยวข้องกับการปกป้องโมดูลไฟ AC และ DC (กันน้ำ กันความชื้น กันฝุ่น ป้องกันการกัดกร่อน ฯลฯ) แต่ยังรวมถึงการออกแบบด้านความร้อนของโมดูลไฟ AC และ DC ด้วย วัสดุสำหรับปลูกโมดูลกำลังโดยทั่วไปแบ่งออกเป็นสามประเภท: อีพอกซีเรซิน ยูรีเทน และยางซิลิโคน เนื่องจากความแข็งของอีพอกซีเรซิน จึงไม่สามารถนำมาใช้สำหรับบรรจุภัณฑ์ที่ไวต่อความเครียดและโมดูลและส่วนประกอบ SMT ดังนั้นจึงถูกกำจัดโดยทั่วไปในกำลังของโมดูล เสบียง. แต่อีพอกซีเรซินยังถูกใช้ในอุปกรณ์จ่ายไฟขนาดเล็กที่มีต้นทุนต่ำ เนื่องจากมีต้นทุนต่ำ ผู้ผลิตแหล่งจ่ายไฟไม่ดีในประเทศบางรายยังใช้อีพอกซีเรซินนี้สำหรับไฟ AC และ...
ดูรายละเอียด -
2023-5-3
AC-DC Converter Module: Efficient Power Conversion Solution
The AC-DC converter module is a high-performance power conversion solution that is designed to convert alternating current (AC) into direct current (DC). This converter module is widely used in various electronic devices and appliances, such as computers, televisions, mobile phones, and many others.The primary function of the AC-DC converter module is to convert the high voltage and high frequency AC power supply into a stable and low voltage DC power. This module is composed of various electronic components, such as diodes, capacitors, inductors, transformers, and transistors. These components work together to regulate the voltage and current of the output DC power, which is critical for the proper functioning of electronic devices.One of the significant advantages of the AC-DC converter module...
ดูรายละเอียด -
2023-7-18
The demand for efficient and reliable power conversion solutions has never been greater. In today's fast-paced world, where technology plays a crucial role in our daily lives, it is essential to have power converters that can keep up with the increasing power demands of electronic devices. That's where the SP Series AC DC Converter comes in. The SP Series AC DC Converter is a cutting-edge power conversion solution that offers the perfect balance of efficiency and reliability. Designed with the latest technological advancements, this converter is capable of delivering high-quality power with minimal energy loss, making it an ideal choice for a wide range of applications. One of the standout features of the SP Series AC DC Converter is its...
ดูรายละเอียด -
2023-12-10
Highly Efficient and Versatile 1000W Modular Power Supply: Your Ultimate Energy Solution
In today's technologically advanced world, having a reliable and efficient power supply is essential for all our energy needs. Introducing the highly efficient and versatile 1000W modular power supply - the ultimate energy solution for your various devices and applications. With a power rating of 1000W, this modular power supply is capable of providing a stable and continuous supply of electricity to meet the demands of high-power devices such as gaming PCs, servers, workstations, and other power-hungry appliances. Whether you are a professional gamer, a content creator, or a data-driven professional, this power supply has got you covered. One of the key features of this power supply is its modular design. Unlike traditional power supplies, the modular design allows you...
ดูรายละเอียด -
2023-7-9
DM Series: High-Quality DC Power Supply from DC DC Power Supply
DC DC Power Supply is a leading manufacturer and supplier of high-quality DC power supply products. Among their impressive range of offerings, the DM Series stands out as a reliable and efficient solution for all your power supply needs. With advanced technology and superior design, the DM Series ensures stable and precise power delivery for a wide variety of applications. One of the key highlights of the DM Series is its versatility. It is available in a range of voltage and current options, making it suitable for various industries and applications. Whether you need a power supply for telecommunications, industrial automation, medical equipment, or any other field, the DM Series has got you covered. The DM Series is designed to...
ดูรายละเอียด