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Viewing profile — lpmay

lpmay

HN member
Joined
Wed, Aug 28, 2013, 3:12 AM UTC
HN karma
233
Public activity
55 items

About lpmay

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Recent public activity

  1. comment
    Comment #40411292

    I would never have guessed this configuration was so rare. D-sub connectors seem to have more active use in aerospace and defense that you might expect (Until I started working pro…

  2. comment
    Comment #39610438

    yes sorry, pitch is smaller density is higher

  3. comment
    Comment #39610249

    The important distinction is between on-silicon interconnects and off-silicon. On silicon, the interconnect density is much higher so it's feasible to get high bandwidth by having …

  4. story
  5. comment
    Comment #30940025

    The "PIC32" family from microchip is also MIPS based

  6. comment
    Comment #30583095

    No problem! You are not the first person I've heard express the impression that the MSP430 is slipping into irrelevance, and while I agree the places it shines may be getting squee…

  7. comment
    Comment #30580196

    I think the platform is very much still alive and kicking. It is still the only uP platform I am aware of which is available with embedded FRAM which is low power, non volatile, ex…

  8. comment
    Comment #30577332

    It's up to hobbyists what's worth it to them, but the power consumption of the ESP 8266/32 is not _really_ comparable to the '430. "Deep sleep" mode on the ESP seems to be about 20…

  9. comment
    Comment #28994758

    Don't know if their copy editors read these, but "Gallium Nitrate" is surely a typo for "Gallium Nitride" (GaN). GaN is a wide bandgap semiconductor, Gallium Nitrate is apparently …

  10. story
  11. comment
    Comment #27656343

    It's because the speed of sound (in any material) is much slower than the speed of light (even in high dk materials). To make a selective and low loss filter you want to use resona…

  12. comment
    Comment #27376613

    Just a hint - extra attributes in the `mkShell` appear as environment variables in the built shell. So instead of a `shellHook` for this you can just have an attribute `ERL_LIBS=""…

  13. comment
    Comment #25224873

    Also see meson's[0] built in package management called wrap-db[1] [0] https://mesonbuild.com/ [1] https://wrapdb.mesonbuild.com/

  14. comment
    Comment #23560792

    Down to DC? That should be a surprise, because it's certainly not true! Faraday's law of induction only applies to varying fields, which means AC or physical movement. Remember, it…

  15. comment
    Comment #21986902

    What is "OBD-C"? Did the appropriate the USB-C connector for an OBD connection for some reason?

  16. comment
    Comment #21092838

    No, the power consumed is equal. The capacitance doesn't stop charging at time tao as you imply, it continues to charge until it reaches the final driving voltage, which is why int…

  17. comment
    Comment #21092816

    No, the power consumed is equal. The capacitance doesn't stop charging at time tao as you imply, it continues to charge until it reaches the final driving voltage, which is why int…

  18. comment
    Comment #20591390

    Yes, but I don't think your refuted my point. 16 bits (96dB SNR) is pretty good for an 18MHz signal processing system. Comparing it to a 18MHz 8bit AVR with a 10bit, 15ksps ADC is …

  19. comment
    Comment #20581351

    Sure, but analog processing happens continuously and at an SNR that is equivalent to a very high bit depth. If you had an analog processing chain with 18MHz of BW (which granted yo…

  20. comment
    Comment #19182712

    The Waytools text blade sounds somewhat similar to what you're describing: https://waytools.com/

  21. comment
    Comment #18986979

    I love this article, but I just can't help but pick at this nit I have with the "charging the capacitors" part. I'm not intimately familiar with Ethernet specifically, but I am an …

  22. comment
    Comment #18306720

    Nice. Do you have any guides you wrote or used that you can recommend? I'm looking at getting SmartOS set up at home as well, but I know I've got a lot to learn.

  23. comment
    Comment #17882248

    Maybe even hotter than inside, since the epoxy reaction is exothermic as it cures.

  24. comment
    Comment #17398173

    Another cool thing, that was counter intuitive to me is that more than just rejecting multipath, spread spectrum can actually make use of multipath to improve the link (although I …

  25. comment
    Comment #17384399

    Also, the input stage is where noise figure is critical. Larger transistors are lower noise figure.