MEP EP#316: Chunk 2 Chunk Current Returns

MEP EP#316: Chunk 2 Chunk Current Returns

MEP EP#316: Chunk 2 Chunk Current Returns

Circuit grounding - How big is too big?

  • Stephen has a new design that is trying something very odd
    • Planes that connect to the star
  • Difference between different grounding techniques
  • 8 layer monster board with multiple power supplies - low noise
  • Parker likes to think of these problems as the extremes of certain examples as a way to think about what happens
    • Take a "star" topography ground for instance
      • Make the trace lengths that connect to the "star" really small
      • Make the star point really "big"
      • This is vias connections direct to a plain

Coilcraft has “Elevated” inductors

  • Parker found this tweet by Lukas Henkel showing coilcraft has inductors that are elevated off the PCB which allows placing parts under the component
  • Coilcraft XAR7030 series
    • Unique off-the-board design provides 1.5 mm clearance for parts to be mounted underneath
    • Magnetically shielded for high density applications
  • Torex Semiconductor has combined switch mode controllers and inductors to build micro DC/DC converters
  • PCB Assembly problems?
    • Should XYRS now have a Z height?
    • This is typically on the CMs to "get it right"
    • Probably best to let your CM know what your doing in this case to reduce confusion

Jaksot(448)

EP#16: Fixtures of Echoing Tubes

EP#16: Fixtures of Echoing Tubes

Hosts: Parker Dillmann Stephen KraigGuests: N/A Figure 1: Non working Space Echo RE-201 Figure 2: A NuTube 6P1 straight from KORG. Figure 3: The constant current source Stephen is using for his NuTub...

20 Touko 201643min

EP#15: Ridiculously Blinking LED

EP#15: Ridiculously Blinking LED

Hosts: Parker Dillmann Stephen KraigGuests: N/A Figure 1: SSPS front panel test layout. Miniature version of the real front panel to test physical placement and new parts. Figure 2: Two TPS65982-EVM b...

13 Touko 201633min

EP#14: Discrepant Diodes

EP#14: Discrepant Diodes

Hosts: Parker Dillmann Stephen KraigGuests: N/AFigure 1: SSPS front panel layout. Traces to come soon. Figure 2: Inconsistencies in the LTST-C171CKT datasheets.Podcast NotesStephen is still working on...

6 Touko 201635min

EP#13: Picture Books for Engineers

EP#13: Picture Books for Engineers

Podcast NotesOur guest this week is Dustin Holliday, a Production Line Engineer at MacroFab, INC. Dustin programs the My200 paste jetter, the My500 pick and place, and the Rhythm Selective Solder. See...

29 Huhti 201640min

EP#12: Silicon Condensors

EP#12: Silicon Condensors

Podcast NotesStephen built a power supply for an old school tube microphone for Josh. Josh does the recordings for the Podcast. See Figure 1 for the schematic.Microphone is a Sony C37 tube condenser m...

22 Huhti 201630min

EP#11: False Fuses and Kitschy Kickstarters

EP#11: False Fuses and Kitschy Kickstarters

Podcast NotesParker has been hard at work on the PinHeck Test Fixture. It uses over 160 pogo pins to test every single function of the PinHeck Pinball System. There will be an article about designing ...

15 Huhti 201637min

EP#10: IoT’s Cloudy Future

EP#10: IoT’s Cloudy Future

Podcast NotesFirst Guest for the MacroFab Engineering Podcast! Trey German is working on a IoT platform using BLE and a small coin cell.Trey's device worked on the first revision! How often does that ...

8 Huhti 201641min

EP#9: Robots with Feelings

EP#9: Robots with Feelings

**Podcast Notes*** Parker and Stephen continue work on the [Super Simple Power Supply](https://github.com/MacroFab/SSPS). There is a full on simulation of the analog section on MultiSim.* Stephen foun...

1 Huhti 201636min

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