What Is A Spot Welder And Why Do You Need One

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...

Spot Welder

Several factors for the increased temperature of printed circuit board and its solutions

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...

heat dissipation components thermal conductivity cooling system heat sink PCB

Common Surface Treatment Processes

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 ...

Surface treatment

How to measure differential signals using an oscilloscope [Examining the ADSL2+]

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...

differential signal measurement using oscilloscope

Development Trend of Rigid-Flex PCB Manufacturing Process Technology

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...

Manufacturing Process Technology Rigid-Flex PCB

The Impact of Pre-treatment in Solder Mask Bridge of PCB Production

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...

SMD Solder Mask Bridge

How to build an adjustable switching power supply using LM2576 [Buck Converter, CC-CV]

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...

adjustable switching power supply

How is the PCB safety spacing designed?

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...

Non-electrical-related safety spacing Electrical-related safety spacing Safety Spacing PCB

Hack Summer With Your Kids to Win Arduino

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...

summer holiday STEAM solder kit

Solution for Negative Film Deformation of PCB Technology

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...

Deformation. PCB Negative Film

A Powerful 30A DC Motor Driver using Power Mosfets [PWM Controlled, Half Bridge]

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...

DC Motor Driver,Power Mosfets, Half Bridge]

Manila Mini Maker Faire : Glimpse the future and get inspired!

Manila Mini Maker Faire had been held on the Mind Museum last June. It was a great gathering of fascinating, curious people who enjoy learning and who love sharing what they can do. And we are so proud to be their sponsor again. At here, we could meet awesome engineers, artists, scientists and crafters as well as their interesting and inspiring projects. While watching various projects at the exhibition, we can also go to workshops to experience amusing and enjoyable projects by ourselves. Like ...

STEAM Sponsor Maker Faire

How to prevent the PCB from being bended and warped when get through the reflow furnace

Everyone knows that PCBs are easy to be bended or warped when get through the reflow furnace. So how to avoid this situation, here are some advices for you.1. Reduce the effect of temperature on PCB board stress Since the "temperature" is the main source of stress in the board, as long as the temperature of the reflow furnace is lowered or slow the speed of warming up and cooling down in the reflow furnace, the board bending and the board warping can be greatly reduced. However, there ...

PCB reflow furnace

10 Brilliant Soldering Kits for STEAM Education You Can't Miss

Hi PCBWayers, summer holiday is coming. I have been chosen 10 cute badges from Shared Projects. There are all attractive for children. Hope soldering these badges can bring you happy and meaningful parent-child time~ Also, mastering certain soldering kit skill will help teenagers learn electronic technology better and enhance their hands-on skills. It’s an important part of STEAM education.Let’s get to see them!1. Flashlight " I can Solder " STEAM“Gold Award of the I CAN SOLDER KIT...

STEAM badge I CAN Solder Kit

PCB Gold Finger Design and Processing-production

What is the Gold Finger?Gold finger is the connector at the edge of boards. It is similar to fingers, so we called gold finger, please see the following pictures. It is used to protect the printed circuit board prototypes from wear and tear.The surface treatment of the gold finger PCBElectroplated nickel gold: Thickness up to 3-50u", due to its superior conductivity, oxidation resistance and wear resistance, it is widely used in gold finger PCB that require frequent plugging or PCB board th...

PCB Gold Finger

Winners List of I CAN SOLDER KIT 2019

Dear All PCBWayers,“I CAN SOLDER KIT 2019” came to an end. During this three months, we have received more than 100 entries.Thank you very much for your participation and show your excellent works for the world!GOLD AWARD: Flashlight " I can Solder " STEAMAward: $500 In Cash + 5,000 Beans + M5Stack Faces Pocket Computer Judge’s Comments:SILVER AWARD: Blink Coin cell toys collection - 11 boardsAward: $200 In Cash + 2,000 Beans + M5Stack M5FIREJudge’s Comments:BRONZE AWARD: CHALLENGER I...

STEAM EDUCATION I CAN SOLDER KT

Thermoelectric Separation Technology of Copper Core PCB

What is the Thermoelectric Separation Substrate?The circuit part and the thermal layer part of the substrate are on different circuit layers, and the thermal layer part directly contacts the heat dissipation part of the lamp bead to achieve the best heat dissipation (zero thermal resistance) effect. And the material of the substrate is generally the copper substrate. Advantages:1. Selecting the copper substrate: the density is high, the substrate itself has strong heat ...

Get to know the Multi-level /Step Stencil

What is Multi-level /Step Stencil?Partial STEP-UP Stencil and partial STEP-DOWN Stencil are carried out on the steel sheet to make the same printing on the same stencil, so that different areas can obtain different thicknesses of solder paste. According to the performance of components, the size of connection end and the lands, it can accurately control the amount of solder paste which applied to the different components are accurately controlled to make the solder paste printing process efficie...

Laser Cutting Etch Step Stencil Multi-level Stencil

How to output pick place file from Sprint Layout software

There are six ways to output pick place from Sprint Layout software.1. Click the Option2. Then click the Components-Panel3. Click the Export4. Select the Exported Data5. Click the Export6. Import file name and Save

Sprint Layout software pick place file xy centroid file

4 Main Types of Plating Methods in PCB production

There are four main types of plating methods in PCB (Printed Circuit Board) production: finger-plated plating, through-hole plating, reel linkage selective plating and brushing plating. Here's a brief introduction: 1. Finger-plated platingRare metals need to be plated on the board edge connectors, board edge joint or gold fingers to provide lower contact resistance and higher abrasive resistance. This technique is known as finger-plated or protruding partial plating. Gold is often plated on ...

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