MEP EP#331: The PCB Plague

MEP EP#331: The PCB Plague

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

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

Jaksot(448)

EP#8: Bits That Don’t Quit

EP#8: Bits That Don’t Quit

Podcast NotesStephen and Parker do a live discussion on how the digital and analog side of the Super Simple Power Supply will interface with each other. MultiSim has been a huge part in simulating the...

25 Maalis 201639min

EP#7: The Art of Retention Force

EP#7: The Art of Retention Force

Parker has almost finalized the front panel design for the Super Simple Power Supply. Going to have a "VU" meter for how much power it is pulling.Parker is also still looking for a proper encoder that...

18 Maalis 201624min

EP#6: Mythical Transistors

EP#6: Mythical Transistors

Podcast NotesParker is still working on the Super Simple Power Supply. He is designing the front panel. He is considering using some WP1043 Kingbright LEDs.Super Simple Power Supply will have two deci...

11 Maalis 201625min

EP#5: Tilting Tubes

EP#5: Tilting Tubes

Parker ordered all the parts for the SAIM this week. The v-slot rails and brackets from OpenBuild, iES-1706 servos from Leadshine, and 3D printed parts from Shapeways.MacroFab uses 3D printed parts to...

4 Maalis 201647min

EP#4: Linear Effects of Licensing

EP#4: Linear Effects of Licensing

Audio quality of the podcast leveled up! Stephen and Parker went over to The Pharmacy Recording Studio which is run by Josh Moore. He hooked them up with 2 (!) microphones and a nice an acoustically p...

26 Helmi 201617min

EP#3: Liquid Toroidal Electrons

EP#3: Liquid Toroidal Electrons

Stephen and Parker have been testing the main opamp for the OPA541. Stephen wrote a blog post detailing the opamp tests with simulation and real world testing.GitHub link to the repository for the SSP...

19 Helmi 201622min

EP#2: Mechanical MultiSIM Monsters

EP#2: Mechanical MultiSIM Monsters

Stephen continues his work on the Stupid Simple Power Supply (SSPS). He decided to go digital voltage control over analog. Also he has been trying out MultiSIM BLUE by Mouser for circuit simulation. S...

10 Helmi 201620min

EP#1: Opamp-timal Power Supply

EP#1: Opamp-timal Power Supply

Stephen talks about the Stupid Simple Power Supply (SSPS). He designed a OPA541 breakout board for testing. See figure 1.OPA541 Datasheet : Street price of $21.88.Parker brings up that blinky LEDs are...

9 Helmi 201623min

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