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Ask HN: What did you find out or explore today?

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Re: Ask HN: What did you find out or explore today?

#381

Post by frm88 »

loopback_device wrote: post #243
frm88 wrote: post #176

Earlier quoted context omitted.

Equally as difficult, except for very small ones that go on a table - these are more of a decorative item than a bucket. Enamel in general has gotten somewhat rare. I found one (!) factory in Germany that does these. One. Edit: I just checked:10l is max. There are no bigger ones and now I wonder why :)

In case you haven't found it yet; have a look on https://emaille24.de/ - they do have buckets up to 12l (with lids).

Thanks to your and your sibling commentor's replies I will soon be the proud owner of a lidded, enamelled bucket :)

Re: Ask HN: What did you find out or explore today?

#382

Post by frm88 »

svilen_dobrev wrote: post #278
frm88 wrote: post #176

Earlier quoted context omitted.

Equally as difficult, except for very small ones that go on a table - these are more of a decorative item than a bucket. Enamel in general has gotten somewhat rare. I found one (!) factory in Germany that does these. One. Edit: I just checked:10l is max. There are no bigger ones and now I wonder why :)

searching for "емайлирани съдове" in bulgarian.. https://elcishop.com/product-category/емайлирани-съдове/ https://www.mira-n.net/emailirani_rom_black.html https://zana-bg.com/kuhnya/sdove-za-gotvene/emajlirani/kupro... so 16L - and 50L - pots do exist.. but you have to find some importer around you. Manufacturers Seems russian, romanian, bulgarian..

Thanks to your and your sibling commentor's replies I will soon be the proud owner of a lidded, enamelled bucket :)

Re: Ask HN: What did you find out or explore today?

#383

Post by Teddy_Kord »

GarnetFloride wrote: post #374
gglitch wrote: post #235

Earlier quoted context omitted.

Any titles or resources you have found particularly interesting?

Warning: opening a can of worms. Ann Blair is a great source on general, but there are so many facets to this topic here's a list that I have read or am going to read. * The Notebook: A History of Thinking on Paper by Roland Allen * The Carrier Bag Theory of Fiction by Ursula K. Le Guin * Too Much To Know: Managing Scholarly Information Before the Modern Age by Ann M. Blair * Communicating with Slip Boxes: An Empiric…

Wow, I've had an interest in the history of note-taking but that is a huge list. Have you read all those books? Do you have a top 5?

Re: Ask HN: What did you find out or explore today?

#384

Post by AdamN »

Aachen wrote: post #298
AdamN wrote: post #250

I used RfP (Request for Payment) today for the first time. It was ~11k USD between IBKR and Chase and the transfer was instant with verification on both sides. It's interesting to see the evolution of payments in the US moving so quickly over the past few years (FedNOW, etc...)

Wdym verification on both sides, did the recipient have to do anything? You can't just send money to an account number?

I was transferring to myself (different bank). The message from the sending bank triggered a push notification from the receiving bank which I approved and the money moved instantly. This works for up to $10MM I believe.

Re: Ask HN: What did you find out or explore today?

#385

Post by tomni »

Aachen wrote: post #293
eightys3v3n wrote: post #272

Earlier quoted context omitted.

Ikea makes a reasonably priced CO2 and 2.5 micrometer particle air quality monitor. https://www.ikea.com/global/en/newsroom/retail/the-new-smart... ALPSTUGA My house stays around 800-1000ppm CO2 all the time The HVAC is poorly designed in my opinion.

Checking it out locally, they go for 30€ here. That's cheap! I remember just a few years ago such products costing 80~100€ if you wanted it in a polished product (not a sensor from China, needing to write code to read it out). Is this a direct CO2 measurement, not one of these that uses VOC as a proxy measurement?

I was able to find this blog post of a deep-dive into the ALPSTUGA: https://danieldk.eu/Hardware/Smart-Home/IKEA-ALPSTUGA.

The part from the post that answers your question is this:

The sensing platform used is a Sensirion SEN63C, which uses a STCC4 for CO₂ measurements. Unfortunately, this is not an NDIR sensor. Instead it uses less accurate thermal conductivity sensing. This allows building smaller/cheaper sensors, but it depends on the input of the temperature/humidity sensor, because e.g. humidity influences measurements. Also, the sensor relies on the air mixture being 78% N₂, 21% O₂, 0.93% Ar, 400 ppm CO₂ and will stop giving accurate readings when this composition changes (modulo CO₂). The operating conditions are also more limited than most other CO₂ sensors (10–40 °C, 20–80% RH).

From what I could gather and what is also mentioned in the conclusion is that the sensor is fine to get a general feeling of the CO2 trends, but that you're better off getting a better sensor if you care about exact values.

Re: Ask HN: What did you find out or explore today?

#387

Post by suchoudh »

concept maps being different from mindmaps and that its better to make them by hand than on a software like cmaptools

last week: Worked with son to find time period of a pendulum (a bell attached to a rope) .. the exploration was to get to microseconds precision). I sincerely hope more people could appreciate H C Vermas physics teaching methodology https://hcverma.in/Experiments

Re: Ask HN: What did you find out or explore today?

#388

Post by Aditya_kachhawa »

e40 wrote: post #175
Aditya_kachhawa wrote: post #54

Was reading about version control history and found out Git went from first commit to self-hosting in like a week. Linus was just mad about the BitKeeper licensing thing and hammered it out. Not some grand architecture - just "screw this, I'll do it myself." And somehow that became... everything. Wild.

I was monitoring the linux kernel mailing list when this happened. Wild times. It seemed then that something special was happening.

Oh wow, you were following the mailing list when it happened? That must've been entertaining.

Did it feel significant at the time or just like another "Linus is pissed and building something" moment?

Re: Ask HN: What did you find out or explore today?

#390

Post by [deleted] »

e40 wrote: post #174
datahack wrote: post #89

I’m learning about the “era of the nations” thinking from Hungary’s Balázs Orbán, via an episode of a podcast called the Winston Marshall show. YouTube just randomly suggested it to me. I just rebuild a speed queen dryer that broke with spare parts from Amazon, which revealed a remarkably simplistic engineering. Very surprised by how simplistic the mechanism was. It’s incredible how over engineered most laundry syste…

Still using my Speed Queen washer and dryer. Bought 30 years ago. You’ve given me confidence to try to fix it when it stops working. Thanks!

[deleted]
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