Screaming Circuits: November 2010


Monsters Under the Bed

Monsters, metaphorically speaking, that is. Take a look at this little land pattern for a TO-263 part. Can you tell me the two main things wrong with this land pattern? I'll give you a hint. One of the problems is... Read more

Open Source Mea Culpa or back pedaling? You decide

Last week I wrote about "Ten electronics things to be thankful for in 2010." If you're reading this now, you probably don't need the link because you probably read that article then too. But that's not really relevant. What is... Read more

Ten Electronics Things to be Thankful for in 2010

"Do they have 4th of July in Canada?" The Thanksgiving holiday is upon those of us here in the United States. It's been a bummer of a couple of years for a lot of the electronics world, but there's still... Read more

Narcissistic Parts

Maybe not completely narcissistic, but at least self-centered. Or, self-centering. Okay, are you lost now? Am I making any sense at all? Well, I'm going to say that it doesn't matter, because the world-revolves around me. But what I am... Read more

0.4mm Pitch BGA Land Patterns

We've been getting more and more questions about laying out the 0.4mm pitch Ti OMAP BGA, as is used in the Beagleboard. As I've written before, some of the rules change at these tiny geometries. The Beagleboard folks discovered that... Read more

Land Patterns - Equal and Not Equal

I was recently asked a question about QFN package varieties. The questioner wanted to know if different package variants of 16 contact QFN packages, such as HUQFN, DHVQFN, SQFN and such, all shared the same footprint. If they did, the... Read more

Need a Reference for the Reference

Not long ago, I wrote a short post about non-standard use of reference designators. After doing that, I've been looking at some of my own microcontroller and motor driver boards with an eye for how close to standards I am.... Read more

Faster, chug a chug. Faster, chug a chug...

Ever long for the days when you could lazily send out your files to get boards fabbed and a prototype assembled and then have a leisurely couple of weeks waiting for it all to completed and returned? Well, we're not... Read more

AT Tiny is Tiny

I just spotted a note on Twitter, from SiliconFarmer, referring to the ATtiny44A coming in a 0.45 mm pitch QFN as well as a 0.5mm pitch MLF package. (In practice, an MLF is the same as a QFN, by the... Read more

Little Chippy Challenges

And in terms of "Chippy", in this context, I'm referring to chip-caps and any other tiny little two-connector components. When considering surface mount, most people think of the many-connector parts, like BGAs and QFNs as the challenging components. That's mostly... Read more

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