MEP EP#331: The PCB PlagueNeutrik 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
Neutrik EtherCON Ruggedized RJ45
Interesting PCB failures
Effect of Moon Phase on Tombstoning
Stretching Stainless Stencils? Oddity Today
Project: SNACKEY
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