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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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In honor of Nikola Tesla, hero to engineers', birthday (July 10, 1856), Screaming Circuits has declared this to be National High Voltage AC Month. For those of you who don't know Nikola Tesla... Never mind. If you don't know who... Continue reading
Posted yesterday at Screaming Circuits
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There are a lot of places suitable for running an electronics manufacturing plant. Ours is in Oregon, USA – the Silicon Rain forest, if you will. The slower pace of life here, the proximity to recreation and wilderness, the rain... Continue reading
Posted Jun 19, 2014 at Screaming Circuits
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So, here in Oregon, USA, it's Friday the 13th - and, we have a full moon, to boot. In many societies, both of those would portend of doom. Baseball players tend to be a suspicious lot, so if you're a... Continue reading
Posted Jun 13, 2014 at Screaming Circuits
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I referred to "panel rails" in my blog about V-score panels, but I didn't explain the "whats" and whys" of panel rails. You might find yourself asking "what are panel rails and why would I want to use them?" Well,... Continue reading
Posted Jun 12, 2014 at Screaming Circuits
Our parent company, Milwaukee Electronics was founded 60 years ago, in 1954. That's quite a long time in terms of electronics. 60 years back 1954 was a big year for transistor electronics. The first commercially produced transistor radio, the Regency... Continue reading
Posted Jun 9, 2014 at Screaming Circuits
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Some people, especially in the manufacturing industry, refer to PC board panels by the term "palette." I can't seem to avoid thinking of the big wooden thing used for shipping stuff, so it's tough for me to call a panel... Continue reading
Posted Jun 6, 2014 at Screaming Circuits
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In my prior post, I covered V-sore panelization. The other very common panelization method is called tab-routing, as in routed, but with tabs. (That's "routed" like using a router, not as in Napoleon being chased out of Russia.) Following this... Continue reading
Posted Jun 2, 2014 at Screaming Circuits
Screaming Circuits added a favorite at Everything Typepad
May 15, 2014
Screaming Circuits added a favorite at Everything Typepad
May 15, 2014
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My last post talked a bit about panelization, in general. Today, I'm taking a look at V-Score panelization. V-score is created by running a V-shaped blade across the top and bottom of the panel without cutting all the way through.... Continue reading
Posted May 15, 2014 at Screaming Circuits
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Most PCBs we receive are individually routed, i.e., not panelized. That doesn't mean that, sometimes, sending them in a panel isn't a good idea, or required. Generally, we don't require panels (sometimes called a pallet), but there are some cases... Continue reading
Posted May 12, 2014 at Screaming Circuits
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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 Apr 16, 2014 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