Screaming Circuits: Tips and tools

PROTOTYPE AND SMALL VOLUME
PCB ASSEMBLY MADE EASY

Panelization

A lot of small quantity PCBs come individually routed these days, but when they get too small or come in larger quantities, panels can be very nice to have. When you have your PCBs panelized, what's your preferred method? And... Read more

Thermal Mass Follow Up

RoHS has been with the electronics manufacturing world for quite a while now but there is still a lot of issues and uncertainty associated with it. As I wrote not long ago, even parts that are supposedly compliant can in... Read more

More Thermal Mass Issues

Yesterday I wrote about some thermal mass related traps. Here's another one we see now and then. The top image shows good flat-topped caps. The bottom and inset has overheated bulged and damaged caps. These caps are RoHS compliant -... Read more

Thermal Mass

I mentioned thermal mass in a recent post and was thinking over my oatmeal that its a subject deserving of more attention. That's more attention to thermal mass, not to oatmeal. Although, oatmeal is a pretty healthy food so it... Read more

Toyota is as Toyota does

Everyone else seems to be writing about Toyota sudden acceleration problems, so I should probably do that too. Or should I? Personally, I have absolutely no solid information about what's going on with Toyota cars. There's an awful lot written,... Read more

Ambiguous PCB Markings

Here's a little issue we run into now and then. Which reference designator goes with which part? Quick. I need to know. Now. Now. Now! It's less of an issue with SMT parts because we machine place them and use... Read more

Inverted QFN Land Pattern

Have you ever experienced the heartbreak of inverted land pattern? It's not supposed to happen, but every now and then, it does. Maybe something happened when creating a custom footprint. Maybe, somehow it got inverted in the CAD software and... Read more

You got C in my L. No, you got L in my C

Just another tale of a poor little capacitor feeling lonely and trying look up to a big inductor for advice and guidance. Sadly, Henry, the inductor rebuffed the little uf with nary a word and kept his emf to himself.... Read more

Via in Pad with Passive Components

Most of the via-in-pad writing I do concerns BGAs and QFNs. I do cover other parts from time to time, but the subject seems to come up most often with those packages. It is an important subject with passives too... Read more

Solder Paste Stencil Opening

Here's a case of "close, but no cigar" with the stencil opening. The pads are, in fact, covered by the openings, but as you can see, the openings are too big. This stencil would end up laying way too much... Read more