Author Archives: Duane

About Duane

Duane is the Web Marketing Manager for Screaming Circuits, an EMS company based in Canby, Oregon. He blogs regularly on matters ranging from circuit board design and assembly to general industry observations.

Push-me Pull-you LEDs

I may never get tired of talking about LED and diode polarities. It’s so much fun. Not long ago, I wrote about two LEDs from the same manufacturer, marked with opposite polarities. I recently ran into another one, but at … Continue reading

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Intergalactic Geek Pride Day Quiz

There was a time when “Geek” was far from a badge of honor. Jr. High School (AKA middle school) was developed specifically for the purpose of making geeks miserable. We were told that lockers were¬† designed for holding books, lunches … Continue reading

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The Value of Open Source

There were a number of interesting sessions and debates at the DesignWest show. One of the more passion filled, was on the value of Open Source hardware. Some people think it will save the world,if only everyone will do everything … Continue reading

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LEDs: Seeing Double

Like I do so often, I’m being a bit redundant. While I’m all for stamping out and eliminating redundancy, this is redundancy with a purpose (not a porpoise). Not long ago, in a galaxy not far away, I blogged about … Continue reading

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Will a Via Fit Between?

I don’t know that it would be accurate to say that BGAs have ever been easy, but with 0.4mm pitch being common and 0.3mm pitch showing up, some of the older size, like a WHOLE millimeter pitch seem positively spacious. … Continue reading

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More Cautionary Tails

I recently wrote about the horrors of LED marking variations. Unfortunately, LEDs aren’t the only place to find inconsistencies in our world. Another part to keep a close eye on is the ubiquitous three-terminal voltage regulator. For just short of … Continue reading

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How NOT to Mark a Diode

A while back, I wrote about ambiguity in the markings on electrolytic capacitors. In doing that, I cobbled together a little image to illustrate how surface mount electrolytics are marked. Take a look at the image below: Note how I … Continue reading

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More Beagle CAD Paws

Continuing on from my last post … As I said, I do everything I can to avoid reusing the package footprint when adding the the parts library in Eagle CAD. The schematic symbol can be a different story though. It … Continue reading

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Beagle CAD Paw Prints

Unfortunately, I can’t generically hand out Eagle CAD QFN footprints without knowing the specific part, but I can illustrate the areas I initially had difficulty with. All of the traps that used to get me seem blindingly obvious now, but … Continue reading

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The ESD Habbit, or An Unexpected Shock

Excitement is building here. In a little over two weeks from today, The Hobbit movie will be released to theaters. I’m sure everyone reading here knows the story, but in case you don’t I’ll spoil it for you. It’s a … Continue reading

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