MEP EP#331: The PCB Plague

<h4><a href="https://macrofab.com/blog/mep-ep331-the-pcb-plague/" target="_blank">MEP EP#331: The PCB Plague<b><br></b></a></h4><p><a href="https://www.neutrik.com/en/products/audio/ethercon" target="_blank" rel="noopener"><b>Neutrik EtherCON Ruggedized RJ45</b></a></p> <ul> <li aria-level="1">Lockable RJ45 cable within an XLR style housing</li> <li aria-level="1">Also come in a sealed version that offers IP65 rating</li> </ul> <p><b>Interesting PCB failures</b></p> <ul> <li aria-level="1"><a href="https://www.protoexpress.com/blog/work-around-black-pad/" target="_blank" rel="noopener">“The Plague”</a></li> <li aria-level="1">Black Pad</li> <li aria-level="1">Very poor to no solderability</li> </ul> <p><a href="https://hackaday.io/project/175465-effect-of-moon-phase-on-tombstoning" target="_blank" rel="noopener"><b>Effect of Moon Phase on Tombstoning</b></a></p> <ul> <li aria-level="1">Many factors play a role in the overall outcome of PCB assembly, especially when very small components are involved. Broadly speaking, tombstoning is a problem with very small 2-pin components (0201 caps and such) and we've filtered out the following challenges:</li> <li aria-level="1">- proper paste application</li> <li aria-level="1">- component placement</li> <li aria-level="1">- designing for "good" thermal properties of the PCB with regard to tombstoning</li> <li aria-level="1">- moon phase</li> </ul> <p><b>Stretching Stainless Stencils? Oddity Today</b></p> <ul> <li aria-level="1">Interesting manufacturing defect surfacing</li> <li aria-level="1">Stencil “stretches” ever couple panels or so</li> <li aria-level="1">Anyone ever seen or experienced this before?</li> <li aria-level="1">Solutions? Next Steps?</li> </ul> <p><b>Project: SNACKEY</b></p> <ul> <li aria-level="1">Hacking a USI/Vendnet/FSI 3159</li> <li aria-level="1">Theory of how a snack machine works</li> <li aria-level="1">Interesting Parts <ul> <li aria-level="2">UCN5890A</li> <li aria-level="2">UCN5842A</li> <