Hacker News: theatrus2

New comment by theatrus2 in "What Is a Direct Attach Copper (DAC) Cable"

theatrus2 — Wed, 27 May 2026 15:20:51 +0000

This is the way. The 10G cards are ancient and hog all the PCIe lanes.

I’ve had the best luck with Mellanox ConnectX 4 or 5 cards. The 5 can happily run 25G on a modern lane constrained system.

It Wasn't a Culture Problem: Upleveling Alert Development at Airbnb

theatrus2 — Wed, 04 Mar 2026 19:11:11 +0000

Article URL: https://medium.com/airbnb-engineering/it-wasnt-a-culture-problem-upleveling-alert-development-at-airbnb-01e2290eb0f5

Comments URL: https://news.ycombinator.com/item?id=47252331

Points: 2

# Comments: 0

New comment by theatrus2 in "LG UltraFine Evo 6K 32-inch Monitor Review"

theatrus2 — Tue, 20 Jan 2026 21:55:11 +0000

It's amazing how well the ProDisplay XDR has held out. Especially if you care about any HDR workflow.

New comment by theatrus2 in "How Intel Missed the iPhone: The XScale Era"

theatrus2 — Thu, 29 Aug 2024 16:29:03 +0000

Its also clear that the carrier wasn't ready for it. People with the original iPhone would get entire boxes mailed to them for their Cingular statement, itemizing every data transaction, but then all flat rate charged.

New comment by theatrus2 in "AM radio law opposed by tech and auto industries is close to passing"

theatrus2 — Sat, 04 May 2024 20:05:07 +0000

Simple: motor inverters are switching power in this frequency range.

It’s already below FCC limits for unintended radiation - it’s not going to block AM activity far from the vehicle, but putting the antenna in the midst of all that radiated noise is challenging.

New comment by theatrus2 in "Tesla recalls all cybertrucks for faulty accelerator pedals"

theatrus2 — Fri, 19 Apr 2024 19:33:50 +0000

Lots of continual updates, some release notes aggregated at third party sites like this: https://www.notateslaapp.com/software-updates/

New comment by theatrus2 in "Formlabs Form 4 3D Printer Beats Injection Molding Machine in Speed and Quality [video]"

theatrus2 — Wed, 17 Apr 2024 16:30:42 +0000

Lower cost printers are absolutely using LCDs with an LED UV light source. These resin curing printers are pretty darn cheap as well, and have a ton of resolution. They also excel on volume as they do expose the entire plate at once and don’t require scanning a laser around.

The material you get out of such a printer is of course entirely different from an injection molded part.

New comment by theatrus2 in "Why don't we get our drinking water by taking salt out seawater? (2008)"

theatrus2 — Sun, 23 Jul 2023 23:18:21 +0000

Usually a combination of calcium carbonate (or bicarbonate for solubility), calcium chloride, magnesium chloride, and or the sulfate versions of the chlorides.

New comment by theatrus2 in "America’s largest tool company couldn’t make a wrench in America"

theatrus2 — Sun, 23 Jul 2023 00:07:32 +0000

The ability for contract manufacturers to simply source things from neighboring companies is a very real thing - and usually the quality is pretty good. Somehow, working between companies is a quick and fast thing, where here making a new business relationship is seemingly mired in problems.

New comment by theatrus2 in "Louis Rossmann: Autodesk turns lifetime licenses into subscriptions [video]"

theatrus2 — Sat, 01 Jul 2023 16:47:39 +0000

SolidWorks (and Catia upmarket), Siemens NX are the two most popular in the field that Inventor/Fusion plays in. 2d Autocad is pretty entrenched in some industries with no real competition.

New comment by theatrus2 in "The Mysterious 50 Ohm Impedance: Where It Came from and Why We Use It (2021)"

theatrus2 — Mon, 29 May 2023 01:56:18 +0000

KiCad is getting better and better. At this point Altium is copying features _from_ KiCad, so you know the competition is real :).

Altium is still a Delphi-ish program, though with lots of things now just compiling to .Net. The core layout package has always been solid with a very small core developer group running it which is really more what its known for. The library management parts with collaboration are actually getting a lot better (ECAD<->MCAD, etc).

Altium gained tons of weird stuff with a super weird push to "FPGAs for everything", a giant off-shore (not Australian or Carlsbad) development team, and... all of that crash and burned and no actual customer actually understood what was happening. Much of that legacy is still in parts, but most of the features have been removed by now.

New comment by theatrus2 in "How cheap digital verniers work (2017)"

theatrus2 — Tue, 07 Feb 2023 20:19:29 +0000

The entry price of a pair of Mitutoyo calipers isn't that high, and is the standard instrument pretty much everywhere.

New comment by theatrus2 in "ESP32 Buyer’s Guide: Different Chips, Firmware, Sensors"

theatrus2 — Sat, 04 Feb 2023 17:17:12 +0000

No, the SoC is all inclusive.

Various modules do carry FCC modular approval. The whole product needs to be certified of course.

New comment by theatrus2 in "Mac SE/30 logicboard recreation"

theatrus2 — Sat, 20 Mar 2021 20:11:21 +0000

Stop down and take a long exposure. You just want to avoid the focal plane shutter or digital rolling shutter, and capture one beam paint, or lots of beam paints to even out the intensity.

New comment by theatrus2 in "Making money building Shopify micro-SaaS apps"

theatrus2 — Tue, 25 Aug 2020 05:25:05 +0000

The direct ZPL deprecation was dumb. Thankfully Shippo fixes that already.

Shipping is real, and the more carriers you can support seamlessly the better.

New comment by theatrus2 in "SSH Emergency Access"

theatrus2 — Sat, 04 Jul 2020 16:38:25 +0000

If you’re on AWS and have credentials for users there, you can also run bless

https://github.com/Netflix/bless

New comment by theatrus2 in "Flagstaff, Arizona, switched to LEDs without giving astronomers a headache"

theatrus2 — Thu, 24 Oct 2019 14:07:25 +0000

It has nothing to do with filaments and is all with the phosphor coating. Standard white LEDs intentionally bleed the base blue LED through, whereas PCA LEDs do not.

Lumileds is the primary innovator for PCA (and other offshoots). https://www.lumileds.com/uploads/571/DS144-luxeon-c-color-li...

New comment by theatrus2 in "Ask HN: Feasible Alternative to the MacBook Pro?"

theatrus2 — Sun, 20 Oct 2019 15:09:47 +0000

So, just the same as a MBP in that regard.

I use X1Carbons as a daily Linux driver after MBP and am very happy with them.

New comment by theatrus2 in "USB Type-C is still a mess"

theatrus2 — Mon, 11 Jun 2018 17:20:34 +0000

Type-C offers charge rates up to 100W, which means the voltage is ramped to 20V.

There is an entire protocol to negotiate power delivery (including who charges who) http://www.usb.org/developers/powerdelivery/

New comment by theatrus2 in "Ask HN: Who is hiring? (June 2018)"

theatrus2 — Fri, 01 Jun 2018 21:27:00 +0000

Lyft | Infrastructure (Deploys, Developer Experience, Provisioning, Continuous Integration) Engineers | San Francisco, CA; New York, NY

Lyft is hiring in our developer infrastructure organization, which empowers Lyft engineers to reliably and rapidly work on the core Lyft backends and applications.

Ping me at yramin@lyft.com