Electronics Forum | Tue Feb 21 11:59:56 EST 2006 | dannyleach
We design a broad range of DC/DC power supplies for various telecom, internet, and computor applications and have been succesfully using intrusive reflow for ~7 years now. Our pcbs range from 0.065 to 0.090 in thickness and are moslty dense 4 to 8 la
Electronics Forum | Sat Sep 29 09:19:28 EDT 2007 | davef
For people with a statistics background, using Minitab, SAS, Statgraphics, or Statistica is easy. However, for many others it is not so easy. Amoung, DOE software packages compatible with Microsoft Excel are: SPX XL [$250], DOE KISS [$150], DOE PRO
Electronics Forum | Thu Nov 08 07:33:23 EST 2007 | hussman
Why? Just use IPC on finished solder joints as your guide. I've seen groups of people puts hundreds of hours into this task and then tell me a 3 mil stencil is all I need. After reflow, none of the solder joints meet IPC Class 1 and a lot of tombs
Electronics Forum | Wed Feb 13 19:32:02 EST 2008 | daxman
Greetings everyone. We are currently doing some experimentation with solder paste printing over ground planes. In this application, the entire perimeter of the PCB is a ground plane. It's about 4mm wide and wraps around the whole PCB; There is no so
Electronics Forum | Mon Jul 26 11:36:26 EDT 2010 | rgduval
Dean, My first thought relates to your statement: "I was under the impression that manufacturing engineering was responsible..." We find any statement that begins similar to this to be indicative of other issues within an organization. Unless it'
Electronics Forum | Fri May 18 23:48:02 EDT 2012 | mspcb
Hi, Since you're looking information about flexible printed circuits,a book entitled "Printed Circuit Boards R. S. Khandpur" could give you lot of information about flex circuits from Design, Fabrication, and Assembly Phase. The book contains compr
Electronics Forum | Wed May 22 19:10:47 EDT 2013 | anvil1021
We do a lot of these devices and I guess I am not familiar the term "Dry Solder". The QFN device is not designed to have a drain hole, but needs to have thermal vias to control heat in most cases. We have used every possible gnd pad design and modifi
Electronics Forum | Mon Apr 14 17:38:18 EDT 2014 | bradlevy
I've got a small smt board I've already got working prototypes of, which uses a tactile switch. I've got another much less expensive tact switch of similar size that I had avoided due to a difference in actuators I originally had no way around. Now I
Electronics Forum | Mon Jul 08 22:03:39 EDT 2019 | eddy2019
Many beginners do not know how to start learning hardware circuits. In fact, the "hardware circuit" is composed of a part of the "unit module circuit". The so-called "unit module circuit" includes: various regulated power supply circuits (like the LM
Electronics Forum | Thu May 18 23:36:46 EDT 2017 | neoply
Hello all. Thanks for taking up your time to read my post. In this age of questing for ever-more-efficient circuit designs, I have been presented with an anachronistic design problem: I need to keep a roughly constant load on a steam-powered turbine
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