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Various meanings of letters on a circuit board

Do you know the meaning of the letters on the board? Rx is the resistance, there are a lot of resistance in the circuit diagram, numbered R1, R2... Cx is the no polarity capacitor, the power input terminal, the anti-interference capacitor; IC integrated circuit module; Ux is the IC [...]

Various meanings of letters on a circuit board <span class="sdata2" title="2017-11-22T11:26:07+00:00"></span>

Electricity, electronics, electrical, electrical appliances but also can not tell them apart?

From the perspective of disciplines Electricity, electronics and electrical appliances belong to electrical engineering. The term "electrical engineering" comes from Japan, in which the "gas" comes from the Western foreign language translation (the beginning of Western industry, power machinery driven by the steam turbine, and later with the power, [...]

Electricity, electronics, electrical, electrical appliances but also can not tell them apart? <span class="sdata2" title="2017-11-20T14:33:08+00:00"></span>

Circuit board welding engineers have a comprehensive analysis of electrode technology

With the development of technology, technology requirements, more and more circuit boards are now used surface mount components, compared with the traditional package, it can reduce the area of ​​the circuit board, easy to bulk processing, wiring density. Chip resistors and capacitors lead inductance greatly reduced, in the high-frequency [...]

Circuit board welding engineers have a comprehensive analysis of electrode technology <span class="sdata2" title="2017-11-17T14:23:58+00:00"></span>

Basic knowledge of PCB board copper foil

First, the copper profile: Copper foil: A cathodic electrolytic material, a thin, continuous metal foil deposited on the base layer of a circuit board, which serves as a conductor for PCBs. It is easy to adhere to the insulation layer, to accept the protective layer of printing, corrosion after [...]

Basic knowledge of PCB board copper foil <span class="sdata2" title="2017-11-16T11:32:47+00:00"></span>

Common Interface Type Description Of Circuit Design

(1) TTL level interface: This interface type is basically a commonplace, from the university to learn analog circuits, digital circuits began, for the general circuit design, TTL level interface basically can not get off! Its speed is generally limited to within 30MHz, which is due to BJT input of [...]

Common Interface Type Description Of Circuit Design <span class="sdata2" title="2017-11-15T11:04:35+00:00"></span>

PCB Electromagnetic Compatibility Problem

Printed circuit boards are the most important part of electronic equipment. With the popularity of electronic technology and the development of integrated circuit technology, a variety of electromagnetic interference problems have emerged, due to electromagnetic interference caused by economic losses are also increasing. Therefore, electromagnetic compatibility is more and [...]

PCB Electromagnetic Compatibility Problem <span class="sdata2" title="2017-11-14T11:36:25+00:00"></span>

Causes and Solutions of PCB Alkaline Etching Common Problems

Problem: The etching rate in the printed circuit is reduced the reason: Due to improper control of the process parameters Solution: According to the process requirements to check and adjust the temperature, spray pressure, solution specific gravity, PH value and ammonium chloride content of the process parameters to the [...]

Causes and Solutions of PCB Alkaline Etching Common Problems <span class="sdata2" title="2017-11-13T15:29:53+00:00"></span>

Exploring the knowledge of Immersion Gold PCB circuit board

First, PCB surface treatment: anti-oxidation, spray tin, lead-free spray tin, immersion gold, Shen tin, Shen silver, hard gold plating, the whole board gold, gold finger, nickel palladium OSP: cost less, Good, harsh storage conditions, time is short, environmentally friendly technology, welding is good, smooth.   Spray tin: spray tin [...]

Exploring the knowledge of Immersion Gold PCB circuit board <span class="sdata2" title="2017-11-13T15:36:44+00:00"></span>

PCB etching process and process control

The process of printing a circuit board from a light plate to a display line pattern is a process of complex physical and chemical reactions. This paper analyzes its last step - etching. At present, the typical process of printed circuit board (PCB) processing is "graphic plating". That is, [...]

PCB etching process and process control <span class="sdata2" title="2017-11-11T08:42:43+00:00"></span>

Analysis on the Causes of No Copper in PTH

Different resin systems and material substrates, different resin systems, will lead to the effect of copper and copper when the activation of the difference between the significant difference. Especially some of the CEM composite substrate and high-frequency silver substrate specificity, in the chemical treatment of copper, the need to [...]

Analysis on the Causes of No Copper in PTH <span class="sdata2" title="2017-11-11T08:44:41+00:00"></span>

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