Screaming Circuits: January 2011

PROTOTYPE AND SMALL VOLUME
PCB ASSEMBLY MADE EASY

The 15 contest!

Or, would that be the 125 contest. Maybe the 22B contest or the 1053 contest. Ah - the 555Contest. That has a ring to it. Come one, come all who want to have fun with the venerable 555 timer chip.... Read more

Cute Wiring

Yesterday, I wrote about my foibles in ignoring my own advice. As SiliconFarmer pointed out over on Twitter, it's not just something you need to do when you're re-purposing a close land pattern. Sometimes even the "correct" pattern can have... Read more

Lesson Learned... Or Not

I've written quite a number of times about the perils of CAD software land patterns. Especially if you don't have an exact match and need to adapt something close. Recently, I was looking in my Eagle library for a low-drop... Read more

Twitter, What is it Good For? Absolutely 555contest

I follow a few people on Twitter. A few people follow me on Twitter. A number of web sites have engaged their readers in debates about the usefulness of Twitter (and other social media) to engineers. In general, these debates... Read more

A Bit More On the LGA

After my last post about LGA land patterns, I received a couple of questions asking for more detail in a few areas. "The LinearTech LGA apnote (LTM46xx series) shows planes on the mounting layer interconnecting pads that are solder mask... Read more

What about the LGA?

I've written a bit about soldermask defined (SMD) vs. non soldermask defined (NSMD) pads for BGAs. Quick summary: 0.5mm pitch or wider spacing, go with NSMD pads. 0.4mm pitch seem to need SMD pads to prevent bridging (unless the pads... Read more

What's Missing?

There is something about this PCB that will likely cause trouble for anyone assembling it. The first three people to correctly identify the issue get a Screaming Circuits 1GB USB drive. I know, this day and age, 1 GB doesn't... Read more

0 or 1?

I've been running around telling people "Happy New Decade." Generally, such has been received with a blank stare or some comment related to me being sarcastic. Back when we turned from 1999 to 2000 and again from 2000 to 2001,... Read more

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