etch pcb

4-layer PCB design (based on AD) Reprinted from:Http://blog.sina.com.cn/s/blog_982d7fa301019f21.html tag: miscellaneous category: technical _ hardware Among the many operating layers provided by the system, there are two layers of electrical layers, namely the signal layer and the inner layer. These two layers have completely different properties and usage methods. The signal layer is called the front-slice

Ctrl+end tune to 0. Q switch mm and mil Ctrl+q/////o+b "Separately according to the" British metric system Switch-----"8 detailed said" 0805 stands for length 80mil width 50mil of which 1mil=10 minus three square inches, 1 inches =25.40mmThat's 0805 of the length is about 2.0MM and the width is about 1.27MM. V+f display of all PCB components Top overlay Layer (note), similar to the wiring inside the pad "Align": check-right-click-align-align bottom

參考资料 通过以下的关键词直接从网络上Google或Baidu就能非常easy的找到以下的资料，这里仅仅是以參考文献的方式做一个整理以及简单的说明。 刘雅芳，张俊辉. 抗干扰角度分析六层板的布线技巧. 天津光电通信技术有限公司技术中心.介绍了六层板的布线技巧，非常有用，画多层板的强烈推荐。 AN1258, "Op Amp Precision Design: PCB Layout Techniques", Microchip.我就是看着这个做运放的PCB的布局布线的，看了非常多遍。 John Ardizzoni. Apractical Guide to High-Speed Printed-Cricuit-Board Layout. Analog Dialogue.快速PCB设计的布局方法，简单看了看，老外写的东西

With the help of software, you can go to linux for PCB-general Linux technology-Linux programming and kernel information. The following is a detailed description. My bashrc is as follows # Cadence PSD environment icq 111290069. CDS_INST_DIR =/opt/psd CDS_LIC_FILE = $ CDS_INST_DIR/share/cadence. license CDS_DIR = $ CDS_INST_DIR CONCEPT_INST_DIR = $ CDS_DIR CDS_SITE = $ CDS_DIR/share/local/ LD_LIBRARY_PATH = $ LD_LIBRARY_PATH: $ CONCEPT_INST_DIR/tools

Before designing a multilayer PCB, the designer must first determine the structure of the PCB based on the circuit size, circuit board size, and EMC requirements, that is, it is decided to adopt a 4-layer, 6-layer, or more layers of the circuit board. After determining the number of layers, determine the placement location of the inner electrical layer and how different signals are distributed on these laye

After the schematic design, the drawing board is required. a pcb file is required. There are several ways to generate a PCB file: 1. directly use File> New> PCB in the toolbar to create a PCB, as shown in figure 2. Another better method is to use the PCB generation wi

ArticleDirectory 10 C 20 C 30 C Copper Trace width Maximum current amps Inch Mm Relationship between PCB width and current Reprinted from: http://www.dianyuan.com/article/207334, calculation method is as follows: First, calculate the cross-sectional area of the track. The thickness of most PCB copper foil is 35um (if you are not sure, you can ask the

650) This. length = 650; "width =" 391 "Height =" 270 "src =" http://www.mr-wu.cn/wp-content/uploads/2014/10/Altera%E5%85%AC%E5%8F%B8%E9% AB %98%E9%80%9FPCB%E5%B8%83%E7%BA%BF%E6%8C%87%E5%8D%97-%E7%89%B9%E8%89%B2%E9%A1%B5.gif "class =" attachment-post WP-post-image "alt =" Altera High-Speed PCB cabling guide-featured pages "Style =" border: 0px; Height: auto; width: auto; color: RGB (, 51); font-family: 'Open sans ', 'helvetica Neue', Helvetica, Arial,

One, Process Control block (PCB) structureThe Process Control block (PCB) is a specialized data structure that is set up by the system in order to manage processes. It is used by the system to document the external characteristics of the process and to describe the process of its movement. At the same time, the system can use the PCB to control and manage the pro

One, Process Control block (PCB) structureThe Process Control block (PCB) is a specialized data structure that is set up by the system in order to manage processes. It is used by the system to document the external characteristics of the process and to describe the process of its movement. At the same time, the system can use the PCB to control and manage the pro

character on the back of the board, two or more layers of characters are used for dual panel. Keepoutlayer (disallow wiring layer) (the red color is the same as the mechanical layer) is simply the frame and shape of the Board. MultiLayer (multi-layer) (silver) All wiring layers are included. Generally, single-and double-sided plug-in pad is on this layer, and the lines are painted on all layers.1. toplayer (top layer) top layer wiring layer, used to draw electrical connection lines between

Article 1 PCB cablingIn PCB design, wiring is an important step to complete the product design. It can be said that the previous preparations are for it. In the entire PCB, wiring is the most restrictive in the design process, the skills are the finest and the workload is the greatest. PCB wiring includes single-sided

In today's fiercely competitive battery power supply market, designers often use dual Panels due to cost restrictions. Despite its significant advantages in dimensions, noise, and performance, the multi-board (Layer 4, layer 6, and Layer 8) solution has prompted engineers to rethink their wiring strategy and adopt dual panels. In this article, we will discuss the correct use and incorrect use of the Automatic wiring function, the design strategy of the current circuit when there is no ground pla

Address: http://pda.c114.net/164/a565914.html Introduction Signal integrity refers to the signal quality in the circuit system. If the signal can be sent from the source end to the receiving end without losing sight within the required time, it is called that the signal is complete. With the rapid development of semiconductor technology, the output speed of IC switches is improved, and the signal integrity problems (including signal overshoot and underloading, ringing, reflection, crosstalk, an

Before the introduction of the PCB (Process Control block), the first implementation of a ' progress bar ', and then according to the program written to analyze the specific PCB implementation principles. The ' progress bar ' function is able to be displayed in a single line, while the progress bar has a dynamic growth change, to know the ratio in the progress bar, but also need to be able toShows you know

Although semiconductor integration is becoming increasingly high, many applications also have ready-to-use on-chip systems, while many powerful and out-of-the-box boards are becoming more accessible, but many use cases of electronic products still require the use of custom PCBs. In one-off development, even a common PCB can play a very important role. The PCB is the physical platform for the design and the

Despite the increasing integration of semiconductors, many applications also have ready-to-use on-chip systems. At the same time, many powerful and out-of-the-box development boards are increasingly accessible, however, in many use cases, the application of electronic products still needs to use custom PCB. In one-time development, even a general PCB can play a very important role.

ObjectiveThe last two days using AD14 software designed a Bluetooth anti-loss circuit board (PCB) drawings, the middle of some details in this document, to facilitate the next design of the PCB reference. Also hope to give the layman's classmates or just into the students a macro view of the General circuit board design process of the article.First, install AD14, crack, account registration, plug-in downloa

After four years of graduation, although the driver of embedded real-time software systems has been working for some time, the title of "Hardware Engineer" has always been available. In fact, it is a bit embarrassing, not to mention the depth of the hardware, in addition to a considerable amount of time to design the hardware circuit, more importantly, the PCB layout. Think about the circuit board, from the single panel on the front panel of the simpl

As a PCB engineer, what should I pay attention to in lay PCB? 1. After the power supply comes in, first go to the filter capacitor. After the filter capacitor is obtained, it is sent to the following device. Because the cabling on the PCB is not an ideal wire, there is a resistor and a distribution inductance. If the power is obtained from the front of the filte