PCB Soldering Skill and Safety Tips
Soldering is something that needs to be practiced. These tips should help you become successful so you can stop practicing and get down to some serious building. Use heatsinks. Heatsinks are a must for the leads of sensitive components such as ICs and transistors. If you don't have a clip on heatsin...
Soldering a Wire Joint or Splice
Another very common task is soldering a joint between two or more wires. Unlike soldering a PCB where the component is generally held only by the solder joint itself, a splice between wires must be physically strong before it is soldered. This usually means twisting the wires together properly and th...
PCB Conformal Coatings and Cold Solder Joints
If the printed circuit board(PCB) you just soldered is going to be used in a hostile environment where it is subjected to moisture, dirt or chemicals, it may be a good idea to apply a conformal coating such as those made by MG Chemicals. These coatings are sprayed onto a PC board to seal it against P...
PCB Soldering Equipment and Preparing Job
The first thing you will need is a soldering iron, which is the heat source used to melt solder. Irons of the 15W to 30W range are good for most electronics/printed circuit board work. Anything higher in wattage and you risk damaging either the component or the board. If you intend to solder heavy co...
Standard Multilayer PCB Building
All available builds are now presented graphically in the Price calculator menu for each service. To access them, enter the number of layers and board thickness you want and then open the build wizard by clicking on Select pre-defined builds. The wizard shows the standard build for the layer/thickn...
All Kinds of PCB Thickness(take HQPCB for example)
The stackups pictured are our "typical" stackups for the layer count and finished thicknesses noted. However, these stackups are not "Guaranteed" unless you so specify in your files used when placing your order. Additionally, for these or any specific stackup that you require, be sure to order as "...
About Standard PCB Thickness
The 63 mil PCB thickness appears often as the thickness specification for PCBs. The question often asked is why is this thickness specified and is it an industry standard? This is one of those topics that warrants looking at the history of PCBs as they have evolved from simple single-sided boards to ...
What to Test？
ResistorOne of the key elements of a PCB, resistors are small electronic devices with two terminals that transmit electric current to produce voltage. To test them, an ohmmeter can be used. First, the resistor must be isolated so that test results are only indicative of the resistor and aren’t comp...
How to Test a PCB
The PCB shown in Fig. 1 is part of a medical diagnostic imaging system. It is placed on a receiving test panel connected to the microprocessor based controller and power supply via a fiber optic cable and a 24V power connector, Fig. 1. Test1 The processor and power supply each consists of several P...
The Common Test Strategy
The most common test/inspection strategy today is Manual Visual Inspection (MVI), followed by In-Circuit Test, and then some form of Functional Test (FT). The grid patterns indicates fault coverage and each test method has significant fault coverage. However most test engineers have spent little ti...
