0    
High quality low cost electronic outsourcing
0      
 
Manufacturing
  PCB Fabrication
Production
PCB Assembly
  PCBA Service
Lead-Free Soldering
Electronic Circuit Design
Electronic Testing&Debug
Environmentalism
 
 
 
 
 
 
 
 
 
 

PCb board design,circuit PCB board design,electronic board design,shenzhen, China,Low cost

Express: PCB Fabrication // Assembly // Design
Professional: PCB Manufacturing // Assembly // product development // Engineering
Low Cost: PCB Manufacturing // Assembly // Design // Components Procurement

Turnkey Solution:
Customers just need to write ONE purchase order to Cn China-PCB-sourcing for a complete engineering task that includes the following:
PCB Circuit Diagram Design/Layout
PCB Fabrication
Component Procurement
PCB Assembly
Our design services - PCB Layout, Electronic Projects Engineering, High Quality, Low costs & Fast Service, backed up by great support.

Design Capability:
The electronic design is called a schematic or circuit diagram. It is constructed in CAD format.At China-PCB-sourcing we use Protel, OrCAD, PADs,CAM350,Genisis... We have an experienced design house/ bureau be family with both military & commercial projects, can do many product Research and Development work(R&D).We have over 80 active accounts with major component manufacturers & distributors (most with Internet access & next day delivery). If the part you require is out there, we'll find it for you.

Express electronic Manufacturing Services
We provide electronic manufacturing services:High quality Low cost bare PCB and PCBA;
(EMS) to customers requiring PCB fabrication and assembly,
sub-assembly, full turnkey box buildor precision mechanical assembly.
PCB Fabrication : 24 hours Express bare PCB manufacturing
PCB Assembly (PCBA), PTH PCB Assembly, SMT PCB Assembly

.
Turnkey solution
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
circuit PCB board design,electronic
Acronyms
Basic tutorials
Theory
Cooling
Analogue electronics
Digital electronics
High speed digital design
Analogue-digital conversion
Protecting ideas and intellectual property
Electronics symbols
Materials
Component markings explained
Electronics construction
Component handling
Soldering
Prototyping
Casing prototype circuits
Circuit board design and making
Electronics design
Manufacturing
Basic circuits
Chemistry
Misc links

--------------------------------------------------------------------------------


Electronics basics


Basics


General

A Guide to Semiconductors Rate this link
How things work - physical explanations how common things work Rate this link
SI Units Rate this link
Techlearner - Basics of electronics and computers, links to industry, latest news on technology. Rate this link
The Vacuum Tube Era (1905 - 1948) - electronics history document Rate this link
Twisted Pair - a site dedicated to those in pursuit of an understanding of Electronics Rate this link
Unit Conversion Factors Rate this link
Using a multimeter - A meter is a measuring instrument. An ammeter measures current, a voltmeter measures the potential difference (voltage) between two points, and an ohmmeter measures resistance. A multimeter combines these functions, and possibly some additional ones as well, into a single instrument. Rate this link
Using the Multimeter to Measure Voltage and Resistance - Multimeters are commonly used to measure voltage and resistance between two points. Current is rarely measured because you must alter the circuit to measure the current. Rate this link Electronic Printed Circuit Board Design
Introduction
Small Run Pcb Fab - Uk
dave-lew99 7 599 September 01, 2008
Last Post by: ezpcb_com
Developer Compatibility
cdk 0 117 August 19, 2008
Last Post by: cdk
Etchant Success! (Pages 1 2 )
tekwiz 29 1,618 August 12, 2008
Last Post by: CWB
First Pcb Design
jimbobjones 5 278 August 06, 2008
Last Post by: jimbobjones
Want To Get A Circuit Built By A Pcb Manufacturer
but a few problemos first s8n 2 139 August 03, 2008
Last Post by: s8n
Solder mask
iamthemik3 16 967 August 02, 2008
Last Post by: Satiagraha
Applying My Own Solder Mask

This information is presented as guidelines to the preliminary design and development stages of electronic circuits for the purpose of preventing potential electromagnetic interference (EMI) and electromagnetic compatibility (EMC) problems.?The tips are representative of good printed circuit board (PCB) design practices and are recommended as a checklist for evaluating and selecting EMI/EMC software modeling tools.?The EMI simulation of circuit delighted to be here today at the launch of the Printed Circuit Board (PCB) Design Scheme. I believe that this project will continue to develop the United Kingdom as a leading global player, in this important high value added area.

As the Government recognised in the 2001 White Paper, "Opportunity for all in a world of change", the development and maintenance of a healthy skills base is vital for ongoing economic success and productivity in the UK. This is especially so in the all important enabling technologies that make the UK a leading Knowledge Economy: IT, Communications and electronics. This is why my Department, in partnership with the Department for Education and Skills, supports a major strategy to maintain and improve the supply of skilled labour for these vital industries.

Our strategy has three key planks:

Maintaining the skills pipeline, so there is a plentiful pool of skilled labour from which business can recruit;


Encouraging diversity in employment in IT, communications and electronics industries - we really must work hard to tackle the under-representation of women in the industry;


Developing new learning content and learning approaches that directly address the needs of business;

This PCB project is part of that third objective, to ensure that industry gets the people it needs, through a ground breaking partnership between industry, the Education system and government.

Printed Circuit Boards are found in most electronic products, virtually all electronic equipment contains one or more. The UK is particularly strong in electronics design. It has the EU's largest independent industry for silicon chip design, with;

40% of all the independent design houses in Europe and;

more than 5,000 PCB Designers.

But if Britain is to continue this work then the number of PCB Designers needs to be maintained and opportunities opened for those currently in the profession to refresh their skills.

PCB Design is one of the highest value-added activities in the production process. Design underpins many of the technical advances in chip speed and new product design and current practitioners need to constantly refresh and update their skills. But we need more than that. We need :

In excess of 500 additional PCB Designers to cope with the growth predicted over the next four years. This is a substantial challenge for various reasons.


First, the traditional methods of entry to this profession through mechanical apprenticeships is now inappropriate for the skills required.


Second, the age profile of existing practitioners is such that we have a real task to encourage and train new entrants just to meet the shortfall that will arise through retirements.

The project will therefore establish PCB design centres in six academic institutions throughout the UK;

Napier University, Edinburgh

University of Glamorgan, South Wales

Castlereagh College, Belfast

Bolton Institute, Bolton, Lancashire

University of East London

Newbury College, Newbury, Berkshire

These institutions will be charged with:

producing, by 2006, up to 500 additional PCB Designers and

retraining over 200 existing practitioners

Improving the status of PCB Designers by creating a more recognisable career path, with three levels of expertise :

Technician, at HNC level

Engineer, at degree level

Architect, through peer review

boards requires the evaluation of many details such as clock frequencies, switching rates, rise/fall times, signal harmonics, data transfer rates, impedances, trace loading and consideration of the types and values of the various circuit components.?The physical layout of the PC board and its associated metallic components are important considerations.?Special attention should be given to the placement and characteristics of signal source components, vias, traces, pads, board stack-up, shielded enclosures, connectors and cables.?/span> For example, as signal frequencies and clock/switching rates increase, PC board trace characteristics can become similar to those of transmission lines and radiators.牋 A PC board trace or component can become an efficient antenna at a length as small as one twentieth of a wavelength.?

EMI/EMC problems may be approached at the component, PC board or enclosure levels.?However, it is much more efficient to deal with these problems as close to the source or susceptible victim as possible.?Therefore, it is important to consider these tips as guidelines for PCB design and layout so that problems may be identified and prevented prior to actual fabrication of the equipment.

General

(1) EMI controls should be applied at the circuit and box levels prior to addressing EMI at the interconnected and system levels.

(2) Digital circuits are more likely to be the source of emissions due to the handling of periodic waveforms and the fast clock/switching rates.?Analog circuits are more likely to be the susceptible victims due to higher gain functions.

(3) The source or susceptible victim of most EMI problems is typically an electronic component.? Although active components are usually the sources of EMI, passive components often contribute to it, depending on the signal frequencies and component's characteristics. ?For example, an inductor can become predominantly capacitive due to the high frequency parasitic coupling between windings.?A capacitor can develop parasitic series inductance due to its internal inductance and external lead inductance at high fundamental and harmonic frequencies.?

(4) EMI problems involving an active component can be the result of the device's output transferring the emissions or its input providing the path for susceptibility.牋 However, at high frequencies the active component may become a direct radiator or receptor of EMI.?Also, the component抯 power and ground connections can provide paths for both emissions and susceptibility.


Acronyms

Abbreviations used in Electronics Rate this link
Electronics Dictionary Rate this link
Lexicon of Semiconductor Terms - Intersil has assembled this Lexicon of Semiconductor Terms, Abbreviations and Acronyms to improve understanding of the exciting world of semiconductors. Rate this link
Metric Prefix in Electronics Rate this link
What does k, M, m, n and p mean in component markings ? Rate this link Practical Electronics - Electrical/Mechanical Engineering and Design -> PCB (Printed Circuit Board) Design


Forum Rules (Please read before posting)
Pages: (7) [1] 2 3 ... Last ?


PCB (Printed Circuit Board) Design
Topic Title Topic Starter Replies Views Last Action
Important Topics
Pinned: PCB - Where do you get them? (Pages 1 2 3 )
Ohmz 52 6,943 August 30, 2008
Last Post by: OverDRIVE
Forum Topics
Help Programming Atmega8 Chips Pls
b1gjo3 2 18 September 06, 2008
Last Post by: b1gjo3
Pcb Gerber
jsbfutre 2 33 September 05, 2008
Last Post by: mankku
Tin/sharpie, Ferric Chloride/hcl Questions
kl27x 9 102 September 04, 2008
Last Post by: tekwiz
High Voltage On The Pcb
layout guidelines, 500V kender 0 55 September 01, 2008
Last Post by: kender
electro

What's in a dB? Rate this link

Basic tutorials

 
 
 
 
 
 
 
 
 
   
Copyright 2007 China-PCB-sourcing Technologies Co.,Ltd. All rights reserved.
PCb board design,circuit PCB board design,electronic board design,shenzhen, China,Low cost