Electronics Forum | Wed Jul 22 12:47:23 EDT 1998 | Earl Moon
| I'm trying to put together a set of design guides for use for new designers | in house or to be sent out for contracted layout work. I would like to start with a top ten list of things that will go wrong if rules aren't available. For example testp
Electronics Forum | Tue Aug 25 12:50:24 EDT 1998 | Lance Smalley
To see if the MV will recognize the marks, in the binary mode, when setting threshold (binary level), raise up the level until the edge of the mark starts to degrade. Write down the number. Lower the level until the fiducial starts to "bloom". Wri
Electronics Forum | Thu May 05 03:22:38 EDT 2005 | Hannu
I do not mean big, heavy transformers but rather small ferrite core transformers, with ferrites in the range of EF16 .. EF40. The weight of the lead and its percentage of the total weight is not the issue here. We simply do not want lead-containing t
Electronics Forum | Mon Apr 10 22:32:14 EDT 2000 | Dave F
Mark: If you're looking for a baseline document for judging the acceptability of: * Mechanical assembly * Component installation * Soldering * Cleanliness * Marking * Coating * Laminate condition * Discrete wiring * Surface mounting of components .
Electronics Forum | Mon Dec 02 15:56:40 EST 2002 | russ
For CYA reasons you made the right choice (I agree with Mark). But, for whatever it is worth I have used Loctite 383 up to 4 years past it's shelf life It worked fine for my application (wire tacking, FR4 bonding etc...). Have you ever seen a shelf
Electronics Forum | Mon Sep 26 16:43:18 EDT 2011 | action_101
I am happy that you work in a shop that can build boards right the first time on a consistent basis. Unfortunately, I would say that every place I have been at, we have had a hard time meeting class III standards day in and day out without some kind
Electronics Forum | Tue May 28 09:08:52 EDT 2002 | pjc
Silkscreening is falling out of favor, as it should. SMT IC devices can have their "pin one" solder lands indicated by a round mark, like a fiducial or a "1" mark, both made from either the copper clad PWB material or silkscreened. I have seen some w
Electronics Forum | Wed May 04 11:54:29 EDT 2005 | HOSS
Rob, Are you hinting that the lead content of this component with dipped tin/lead solder would not be an issue with RoHS? If so, our understanding is that the legislation requires that the 6 banned substances cannot exist at greater than X% in any
Electronics Forum | Mon Feb 20 09:20:07 EST 2006 | dpmilk
It appears to us that the problem lies in the lead-free solder paste rather than the inductors. We have not found a lead-free solder that does not do this. The green is on the copper wire. We believe it gets there during the reflow. The gasses fr
Electronics Forum | Mon Jun 04 18:23:41 EDT 2007 | greggc09
Patrick Q1) Is the test pattern similar to the IPC-B-25? A1) - No - Tests were run on a prototype assembly. Q2) what is the temperature in the test chamber and voltage supplied to the test coupons? A2) 25C with 3.3VDC. Q3) Does this test i
.png)
