EE Bookshelf: Root Cause Failure Analysis of PCB Assemblies
Limor sent this wonderful little document my way after we had some problems with a 0.4mm pitch footprint I made, just to see if we could improve the paste layer and reduce the bridging a bit: Root Cause Failure Analysis of Printed Circuit Board Assemblies. Despite the organization not being the best — a clearer separation of problems from potential solutions/recommendations would have been helpful — there’s a lot of useful information in here. It’s often easier to understand the kinds of problems you encounter working with fine-pitch devices looking at photos. Unfortunately, X-ray images of things like ‘ball-drop’ with BGA reflow aren’t easy to come by, nor post-mortem, sawed-in-half BGA packages, etc. If you’re fascinated by the many ways boards can die a premature death, this is a goldmine of info.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.