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Screaming Circuits
Screaming Circuits company blog
Interests: Assembly, RoHS, smt, BGA, QFN, pcb, chocolate, prototype, quick-turn
Recent Activity
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I've been on a bit of a package binge lately. First talking about metric vs. US passive sizes, and then a very tiny ARM Cortex M0 from Freescale. The Freescale BGA part checks in at 1.6mm x 2mm. That's cool... Continue reading
Posted 3 days ago at Screaming Circuits
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An hour later, you can join me to explore the very basics of Field Programmable Gate Arrays in FPGAs - Light at the End of the Learning Curve. The session is on Tuesday, April 1st, from 3:30 - 4:30, in... Continue reading
Posted Mar 31, 2014 at Screaming Circuits
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If you do happen to end up at the EE Live show, be sure to catch my session: Best Practices in Circuit Board Design. I'll show the most common traps we see that can cause manufacturability issues. The session is... Continue reading
Posted Mar 31, 2014 at Screaming Circuits
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If you're in San Jose, CA this week, stop by and see us at the EELive show. We'll be in booth 927 - just a short walk, and a left turn from the entrance. Show hours are: Tuesday, April 1,... Continue reading
Posted Mar 31, 2014 at Screaming Circuits
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I recently had a conversation with a friend about 0.4mm pitch BGAs. The specific part is the Freescale KL03 ARM Coretex-M0+ microcontroller in a 1.6mm x 2mm, 04.mm pitch package. That's a 20 ball wafer scale BGA form factor. I... Continue reading
Posted Feb 27, 2014 at Screaming Circuits
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I'm working on a special project here that involves some 0402 LEDs and 0201 resistors. When doing such a thing, you should always check the footprint you're using against the data sheet. When using extra small parts, like this, I... Continue reading
Posted Feb 13, 2014 at Screaming Circuits
If you're going to be in San Jose during the first week in April,stop by the EELive show (formerly known as the Embedded Systems Conference). We'll be in booth 972. Stop by and see what we can do for you.... Continue reading
Posted Feb 9, 2014 at Screaming Circuits
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UPDATE Feb 11, 2014 We are back to our usual 40 degrees and drizzling - so business as usual. No more weather delays from this storm. Just dampness. Never... ending... dampness... --------- Yes, we here in the Portland area can... Continue reading
Posted Feb 6, 2014 at Screaming Circuits
In 1954, one of my favorite movies, "THEM!", premiered in U.S. theatres. An even more significant (to us, anyway) event took place in Milwaukee, Wisconsin: The founding of Milwaukee Electronics. We are excited to announce that our parent company, Milwaukee... Continue reading
Posted Feb 5, 2014 at Screaming Circuits
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Does anyone use HASL (Hot Air Surface Leveling) anymore? It's also known as HAL. Prior to the RoHS days, HASL was probably the most common surface finish. You can get it lead free, but most boards seem to use immersion... Continue reading
Posted Jan 21, 2014 at Screaming Circuits
I wrote a bit about ODB++ back in October. Nothing has really changed much since then. I'm just clarifying a few things. First, I want to put more emphasis on the use of ODB++. In addition to being beneficial to... Continue reading
Posted Jan 8, 2014 at Screaming Circuits
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Here at Screaming CIrcuits, we're all busy making sure to get everyone's assembly orders shipped off on time so here's a picture of one of our corporate kitty cats. We have a pair that live on campus here. They seem... Continue reading
Posted Dec 19, 2013 at Screaming Circuits
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I recently received a question over on Twitter. Tomaž Šolc, AKA avian2 asked: "@pcbassembly What is your opinion on the "one big plated drill in QFN ground pad" pattern? pic.twitter.com/M9ZLftpuo0" I answered back: "Bad for machine assembly, okay for hand... Continue reading
Posted Dec 5, 2013 at Screaming Circuits
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Sometimes parts labeled as surface mount aren't quite ready for prime time. I've written about this subject before (read here), and I'm going to write about it again - whether you like it or not. This time, however, I'm not... Continue reading
Posted Dec 3, 2013 at Screaming Circuits
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This isn't a Thanksgiving blog. It is Thanksgiving day, and if it were a Thanksgiving blog, I would have to be working today, but we're shut down for the holiday, so I'm not working. I just woke up pondering what... Continue reading
Posted Nov 28, 2013 at Screaming Circuits
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Gooood evening (said with my best vampire accent) Turn out the lights. Hide your Mosfets. Keep your phase-locked loops locked. Calm your Verilog. Your simulation is useless against the terrors of the infinite state machine. Your impedance is no longer... Continue reading
Posted Oct 31, 2013 at Screaming Circuits
In my last post, I wrote about the up and coming IPC-2581 PCB manufacturing file format. While IPC-2581 may be looked at by PCB fabricators and assemblers as a holy grail of sorts, it's not yet widely adopted by CAD... Continue reading
Posted Oct 15, 2013 at Screaming Circuits
Circuit boards live and die by their manufacturing files. Without complete and accurate information, the board fab house can't fab the boards, the assembly house can't assemble your boards and nobody can buy the parts. Our old standard, the Gerber... Continue reading
Posted Oct 4, 2013 at Screaming Circuits
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Question: What do a conductive floor, foot grounding straps, conductive work smocks, wrist ground straps, foot grounding testers, ESD training, bench-top grounding monitors, anti-static bags, anti-static boxes, grounded carts, anti-static attitudes, conductive desk mats and grounded tools have in common?... Continue reading
Posted Oct 2, 2013 at Screaming Circuits
Watch and see what's important when putting together your parts kit Duane Benson Who's on first? I don't know. PCB Assembly Continue reading
Posted Sep 27, 2013 at Screaming Circuits
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Generally, small pads for passive parts are connected with a single PCB trace of equal size to each pad. That's the right way to do it. However, sometimes, circumstances dictate a little different approach. The illustration on the upper right... Continue reading
Posted Aug 22, 2013 at Screaming Circuits
In case you haven't heard, it's Geek Week on Youtube. In honor of that, here are the top ten most incredible pieces of trivia from ancient Geek Mythology. You can scroll down and read them here, or have the questions... Continue reading
Posted Aug 6, 2013 at Screaming Circuits
Here's a small glimpse into the future of the automobile. Granted,these guys had to take the dash off and hard wire in, but imagine this with a not-secure-enough wireless access. Duane Benson And... some of us here are helping to... Continue reading
Posted Jul 26, 2013 at Screaming Circuits
A few folks requested my presentation from out 10th anniversary open house.So, without much adieu, here it is. Download Top 10 traps 7-2013 (PowerPoint format) Download Top 10 traps 7-2013 (PDF format) Duane Benson 10 time 10 isn't necessarily equal... Continue reading
Posted Jul 19, 2013 at Screaming Circuits
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Via in pad is an old issue that still pops up now and then. Our standard answer hasn't changed: No open vias in pads. But one of the questions we get related to the subject is: "What if we make... Continue reading
Posted Jul 17, 2013 at Screaming Circuits