Electronics Forum: design (Page 368 of 537)

Logic gates-I think

Electronics Forum | Fri Apr 21 13:26:15 EDT 2000 | Bob

I'm working on a project that requires that I analyze a signal from the parallel port of my computer and use it to turn on relays. There are about 19 relays to control, and I designed all the gates to get each one on, but there is a problem with keep

Re: VOC free flux

Electronics Forum | Wed Apr 19 13:32:51 EDT 2000 | C.K.

Dave: The main part of your machine that VOC-Free fluxes attack is your spray fluxer itself. If you haven't already, you'll need to purchase a spray fluxer that's designed to accomodate water-based VOC-Free fluxes (i.e. made of stainless steel with

Converting to 'No-Clean' process

Electronics Forum | Fri Apr 14 13:30:20 EDT 2000 | Murad Kurwa

Hi All: Can you tell me specifically if you converted an exiting product made with Clean process using WS609 or compatible to 'No-Clean' process. We have to convert assemblies from current clean process at a CEM to No-Clean process in our own factor

Re: Re:Help!! Couple more questions

Electronics Forum | Fri Apr 14 04:31:12 EDT 2000 | pascal MATHIEU

Hi Kevin , we use frequently double reflow + selective soldering after , and try to avoid the glue process as much as possible because that 's not very reliable process in comparison to reflow process . We begin now to work on PTH components soldered

Re: PCB PTH Design

Electronics Forum | Mon Mar 27 21:25:01 EST 2000 | Dave F

Pete: Two angles on your question: 1 Yes, the layout of your board can affect the level of bridging you see. 2 That aside, the set-up of your machine also can affect the level of bridging on your board. Shaw, I could set-up your machine to bridge i

Re: Land Pattern Design for PLCC's, QFP's etc... in Full Radius Corners

Electronics Forum | Tue Mar 21 20:36:11 EST 2000 | Dave F

Armin: Boca makes some good points about release. So, let me spin this up from a different angle ... SM-782 suggests "full radius corners" as an alternative to the more familiar square corner pads on PLCC, TSOP and QFP. We see both also. We thin

Re: Solder Skips

Electronics Forum | Mon Mar 20 18:15:05 EST 2000 | Russ

Larry, SOTs are a wonderful thing to try and wave solder! They are about as nice as Tant caps. I have found that shadowing is usually the biggest problem assuming that the other wave parameters are good, in your case it seems that they are. Couple

HAL vs. Silver Coated

Electronics Forum | Fri Mar 10 08:42:40 EST 2000 | John

We're quoting out a new board design, and one of the prospective suppliers is pitching a silver coating process over hot air leveling. We haven't had experience with boards of this type, and I am concerned about any processing issues that may come u

Moisture free storage units.

Electronics Forum | Thu Jun 19 13:21:53 EDT 2003 | kmccarten

I am currently working with Toyo Living, a manufacturer of Desiccant Dry Boxes. These boxes are specifically deisned for the electronics industry offering options of N2 Purge, or ultra-low flow, Out of spec Humidity alarms, Door Alarms, Data logging

Re: footprint formula

Electronics Forum | Fri Mar 03 10:07:15 EST 2000 | Wolfgang Busko

Hi Jacqueline, - what a name in this technical world - I just tried the calculator and for example choose the CQFP and then selected other and an input mask appeared where you have to fill in the required data from the components datasheet. I have to


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