Introduction:With the rapid development of PCB, there are many challenges and much higher requirements of PCB, such as high density, high speed, miniaturization and so on, which makes the traditional manufacturing technology not meet the requirements of these new PCBs.The Traditional Patterns Manufacturing Technology of Multilayer PCB (Take out-layer patterns as an example):After making the inner patterns of multi-layer PCB (MLB), and then it will carry on laminating, drilling and PTH. And after...
lesley
Oct 17,2019
656 views
We know that there may be some problems in the data exchange of each sub-module of the circuit system so that the signal can not be normally and circulated in high quality. For example, sometimes the working sequence of the circuit sub-modules is deviated (such as CPU and peripherals) or The respective signal types are inconsistent (such as the sensor detects the optical signal), etc., then we should consider the corresponding interface to deal with this problem well. The following is a descript...
lesley
Oct 10,2019
601 views
By Hesam Moshiri, Anson BaoFeatures:Identify a fake Lithium-Ion/Lithium-Polymer/NiCd/NiMH batteryAdjustable constant current load (can also be modified by the user)Capable of measuring the capacity of almost any kind of battery (below 5V)Easy to solder, build, and use, even for beginners (all components are Dip)An LCD user interfaceSpecifications:Board Supply: 7V to 9V(Max)Battery Input: 0-5V(max) – no reverse polarityConstant Current Load: 37mA to 540mA(max) – 16 Steps – can be modified by the ...
Anson Bao
Oct 08,2019
4394 views
This article will explain how to place the inductance of the switching power supply on the PCB design. First, let's look at this question: Where should the coil be placed?Switching regulators for voltage conversion use inductors to temporarily store energy. These inductors are typically very large in size and must be placed in the printed circuit board (PCB) layout of the switching regulator. This task is not difficult, because the current through the inductor may change, but not instantaneously...
lesley
Oct 05,2019
958 views
Hello PCBWayers,We will exhibit at HKTDC Hong Kong Electronics Fair (Autumn Edition) on 13-16 October 2019. The chance that we talk to you face to face and give our most sincere greetings. In addition to the product display, we also prepare a lot of mysterious gifts, which will definitely make your visit much more enjoyable.Main Exhibits:Various rigid PCB (single boards/double boards/multi-layer boards/HDI/ Rogers/High-Tg FR4)Aluminum PCBFlexible PCBRigid-flex PCBPCB AssemblySMD StencilPCB Onlin...
lesley
Sep 28,2019
2098 views
The circuit layout is as important as design when implementing a DC-DC buck converter. Poor layout can seriously reduce the design effect. Now let PCBWay introduce some of the best layout practices.Good goals of circuit layout 1.Control radiation and induced noise2.Reduce interference between different parts of the circuit3.Reduce circuit area4.Effective thermal management5.Improved voltage regulation and circuit efficiency6.Avoid additional "band-aid" circuits such as buffers7.Increase stabilit...
lesley
Sep 27,2019
697 views
Dear PCBWayers,The third PCB Design Contest will begin in October, 2019. Since the establishment of PCBWay Shared Project (PCBWayer community), we have collected thousands of outstanding projects. “Bring Your Idea To Life”, is the new theme of this year PCB design contest. Your project will no longer just exist on the web, you will have the opportunity to make it a real product, a business, which will be sold on various platforms, including PCBWayer Bazaar. Call for partnershipPCBWay PCB Design ...
PCBWay
Sep 20,2019
2848 views
The PCB is support for electronic components and is a carrier for electrical connection of electronic components, mainly for supporting and interconnecting. From the outside, the outer layer of the board has three main colors: gold, silver, and light red. Classified by price: gold is the most expensive, silver is second, light red is the cheapest. However, the circuit inside the board is mainly pure copper, which is bare copper.Why are there precious metals on the PCB?PCB as a support for electr...
lesley
Sep 19,2019
776 views
The choice of surface treatment process depends mainly on the type of component that is finally assembled. And the surface treatment process will affect the production, assembly and end use of the PCB. The use occasion of five common surface treatment processes will be described below.Hot Air Solder Level(HASL)HASL has been dominant in PCB surface treatment processes. In the 1980s, more than three-quarters of PCBs used HASL, but the industry has been reducing the use of hot air leveling processe...
lesley
Sep 12,2019
590 views
By Michael & George MarinisElectric and electronic enthusiasts love having every single tool that can make their lives easier. Today, we will be presenting a tool that does just that, a spot welder.What does a spot welder do?:A spot welder – as its name implies – is a device that can weld two metals at a single spot. These two pieces of metal should be “clean”, meaning that there must be no paint or any other coating, so that the current can pass through them. The most important characterist...
Anson Bao
Sep 06,2019
1538 views
The direct factor for the temperature rise of PCB is the existence of power consumption parts and the heat generation intensity varies with the power consumption.There are two phenomena of temperature rise.1.Sectional temperature rise or full -area temperature rise;2. Short-term temperature rise or long-term temperature rise.For the detailed reasons, they are generally analyzed from the following aspects.1.Electrical power consumption(1) Analysis of power consumption per unit area;(2) Analyze th...
PCBWay
Sep 05,2019
2981 views
Surface treatment purposeThe most basic purpose of surface treatment is to ensure good solderability or electrical properties. Since copper in nature tends to exist in the form of oxides in the air, it is unlikely to remain as raw copper for a long time, so other treatments of copper are required. Although in the subsequent assembly, strong flux can be used to remove most of the copper oxide, the strong flux itself is not easy to remove, so the industry generally does not use strong flux.Common ...
lesley
Aug 29,2019
778 views
By Hesam Moshiri, Anson BaoSingle-Ended TransmissionSingle-ended signaling is a simple and common way of transmitting electrical signals from a sender to a receiver. The signal is ground referenced (0 Volt) and one conductor (wire) carries the signal and one conductor carries the common reference potential. The current associated with the signal travels from sender to receiver and returns to the power supply through the shared ground connection. If multiple signals are transmitted, the carrier r...
Anson Bao
Aug 20,2019
2222 views
Introduction:The manufacturing process of rigid-flex PCB is different due to the different types of substrates. The main processes that determine its performance are fine-line technology and microporous technology. With the requirements of the miniaturization, multi-function and intensive assembly of electronic products, the manufacturing technologies of rigid-flex PCBs and embedded flexible PCBs aiming at high-density combination are widely concerned about the high-end PCB technology at present...
lesley
Aug 16,2019
717 views
Introduction:In the PCB industry, in order to ensure the insulation of solder mask of the printed circuit boards, as well as prevent the oxidation of the PCB surface and beautify the appearance, it is usually necessary to apply a layer of solder mask on the PCB surface and the substrate that do not need to be soldered. With the rapid development of electronic industry, the solder mask technology has been developed rapidly.The solder mask between the pads of SMD is called Solder Bridge, whose fun...
lesley
Aug 08,2019
1524 views
By Hesam Moshiri, Anson BaoAbstractSwitching power supplies are known for high efficiency. An adjustable voltage/current supply is an interesting tool, which can be used in many applications such as a Lithium-ion/Lead-acid/NiCD-NiMH battery charger or a standalone power supply. In this article, we will learn to build a variable step-down buck converter using the popular LM2576-Adj chip.FeaturesCheap and easy to build and useConstant current and constant voltage adjustment [CC, CV] capability1.2V...
Anson Bao
Aug 01,2019
5578 views
There are many places in the PCB design that need to consider safe spacing. Here, for the time being, they fall into two categories: one is electrical-related safety spacing, and the other is non-electrical-related safety spacing.Electrical-related safety spacing1 Wire SpacingFor the processing capability of mainstream PCB manufacturers, the distance between the wires and the wires must be at least 4 mils. The minimum line spacing is also the line-to-line, line-to-pad distance. From a production...
lesley
Aug 01,2019
638 views
Hello PCBWayers,Summer is coming with its blazing sun and leisurely holiday. How do you spend the summer holiday with your kids? Go to the beach? Have fun at Disneyland? Or just stay at home to take a break?Here, we prepare an interesting activity: Hack Summer With Your KidsFirst, get soldering kitsSome kits, like Flashlight and ArduinoFlake are in the PCBWayer Bazaar, you can get them just by adding them into your order package. Or you can design a kit on your own. No idea what to design? We ha...
lesley
Jul 26,2019
3258 views
The reasons for the deformation of the negative film and its solution: The reason:(1) Temperature and humidity control failure(2) The exposure machine temperature rises too highSolution:(1) Normally, the temperature is controlled at 22 ± 2 ° C and the humidity is at 55% ± 5% RH.(2) Using a cold light source or an aerator with a cooling device and constantly replacing the backup film The process of negative film deformation correction: 1. Change the Hole Position MethodIn the case of mastering...
lesley
Jul 25,2019
1642 views
By Hesam Moshiri, Anson BaoDC motors are everywhere, from hobby applications to robotics and industrial areas. Therefore there is wide usage and request for suitable and powerful DC motor drivers. In this article, we will learn to build one. You can control it using a Microcontroller, an Arduino, a Raspberry Pi or even a standalone PWM generator chip. By using a proper heatsink and cooling methods, this circuit can handle currents up to 30A.[1]: Circuit AnalysisThe heart of the circuit is an IR2...
Anson Bao
Jul 16,2019
2511 views
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