Circuit Break - A MacroFab Podcast

MEP EP#331: The PCB Plague

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MEP EP#331: The PCB Plague

Neutrik EtherCON Ruggedized RJ45

  • Lockable RJ45 cable within an XLR style housing
  • Also come in a sealed version that offers IP65 rating

    • Interesting PCB failures

    • “The Plague”
    • Black Pad
    • Very poor to no solderability

      • Effect of Moon Phase on Tombstoning

      • 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:
      • - proper paste application
      • - component placement
      • - designing for "good" thermal properties of the PCB with regard to tombstoning
      • - moon phase

        • Stretching Stainless Stencils? Oddity Today

        • Interesting manufacturing defect surfacing
        • Stencil “stretches” ever couple panels or so
        • Anyone ever seen or experienced this before?
        • Solutions? Next Steps?

          • Project: SNACKEY

          • Hacking a USI/Vendnet/FSI 3159
          • Theory of how a snack machine works
          • Interesting Parts
            • UCN5890A
            • UCN5842A
            • SC529136CFN2
            • M48T18-100PC1
            • What I am doing to hack it
              • Motor control
                • High/Low side transistors
                • Might change this to mosfets to reduce voltage drop
                • Arduino all the things
                • Current sensing
                  • INA219 High side sensing
                    • ...more
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                    Circuit Break - A MacroFab PodcastBy MacroFab, Inc.
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