<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News: zsellera</title><link>https://news.ycombinator.com/user?id=zsellera</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Sat, 18 Apr 2026 07:34:13 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=zsellera" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by zsellera in "How bad can a $2.97 ADC be?"]]></title><description><![CDATA[
<p>Most companies have region-specific price lists. My Spotify subscription costs about 60% of what the same plan costs in the US (2200 HUF vs. 11 USD). In the electronics industry, everyone has a separate price list for China.<p>Btw. the western list price is just an indicative at-most number anyway. Even a small-sized project gets discounted prices when you start talking to a sales rep.</p>
]]></description><pubDate>Tue, 14 Oct 2025 21:21:45 +0000</pubDate><link>https://news.ycombinator.com/item?id=45585102</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=45585102</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45585102</guid></item><item><title><![CDATA[New comment by zsellera in "Why does FM sound better than AM?"]]></title><description><![CDATA[
<p>What you "more bandwidth more noise" people miss is the difference in randomness: the noise is random while the signal is not.<p>In case of gaussian noise, double the bandwidth means 1.41x more noise. For signal, double the bandwidth double the signal.</p>
]]></description><pubDate>Mon, 14 Oct 2024 13:10:27 +0000</pubDate><link>https://news.ycombinator.com/item?id=41837187</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=41837187</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41837187</guid></item><item><title><![CDATA[New comment by zsellera in "Scrum's “Product Owner” Problem"]]></title><description><![CDATA[
<p>The same essential skills make a great PO/business analyst as a great engineer: the ability to think in abstract terms and the ability to debug.<p>When successful POs write a book or something, they present the best-practices. They don't share the most important wisdom though: there are pretty smart to start with... Applying their practices without the ability to think does not work, and it's not something one can pick up on the go.<p>Nothing comes from nothing.</p>
]]></description><pubDate>Thu, 10 Oct 2024 12:10:19 +0000</pubDate><link>https://news.ycombinator.com/item?id=41798039</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=41798039</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41798039</guid></item><item><title><![CDATA[New comment by zsellera in "Netlify just sent me a $104k bill for a simple static site"]]></title><description><![CDATA[
<p>After doing some math it doesn't feel like a ddos:<p>- $104k at ($55 / 100 GB) = 189 TB of traffic<p>- It means the popular ~3.5 MB media file was downloaded ~54M times<p>- Which sound like a lot, but if you get popular in a country with 1.4B people, it's not (~3% accessed).<p>What if it happens at AWS Cloudfront? At $.1/GB it sums up to ~$18k. In the light of these, Netlify's offer of  ~$5k seems generous.</p>
]]></description><pubDate>Tue, 27 Feb 2024 07:47:49 +0000</pubDate><link>https://news.ycombinator.com/item?id=39521289</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=39521289</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=39521289</guid></item><item><title><![CDATA[The Helium Network Is Surprisingly Awesome]]></title><description><![CDATA[
<p>Article URL: <a href="https://kucu.io/2022/05/helium-network-awesome/">https://kucu.io/2022/05/helium-network-awesome/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=31423110">https://news.ycombinator.com/item?id=31423110</a></p>
<p>Points: 2</p>
<p># Comments: 1</p>
]]></description><pubDate>Wed, 18 May 2022 14:20:20 +0000</pubDate><link>https://kucu.io/2022/05/helium-network-awesome/</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=31423110</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=31423110</guid></item><item><title><![CDATA[New comment by zsellera in "Someone should probably start a bright home lighting company (2019)"]]></title><description><![CDATA[
<p>There is a little to no consumer market for quality stuff (ppl buy based on price,  maybe lm/W, maybe CRI95+).<p>You'll see great LED installations at:<p>- offices & commercial buildings, where it was designed by an engineer<p>- medical, where identifying things like skin-tone is critical<p>- transportation (often street lights), where it's optimised for night-time contrast</p>
]]></description><pubDate>Mon, 28 Feb 2022 09:34:51 +0000</pubDate><link>https://news.ycombinator.com/item?id=30498055</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=30498055</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=30498055</guid></item><item><title><![CDATA[New comment by zsellera in "Someone should probably start a bright home lighting company (2019)"]]></title><description><![CDATA[
<p>If you ever wondered what makes LED lights feel great: it's the strategic mixing of LEDs with different characteristics.<p>Here's a free tool that helps designing such fixtures:
<a href="https://www.meerkatblog.com/ledmixing" rel="nofollow">https://www.meerkatblog.com/ledmixing</a></p>
]]></description><pubDate>Mon, 28 Feb 2022 08:54:34 +0000</pubDate><link>https://news.ycombinator.com/item?id=30497811</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=30497811</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=30497811</guid></item><item><title><![CDATA[New comment by zsellera in "Those who witnessed Castle Bravo looked into Armageddon"]]></title><description><![CDATA[
<p>The risk of an accident is much lower than the risk of full-on wars w/o them. Nuclear weapons are the reason I can raise my children in a relative peace.</p>
]]></description><pubDate>Fri, 10 Sep 2021 06:24:06 +0000</pubDate><link>https://news.ycombinator.com/item?id=28478391</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=28478391</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28478391</guid></item><item><title><![CDATA[New comment by zsellera in "Launch HN: BlackOakTV (YC S21) – Netflix for black people"]]></title><description><![CDATA[
<p>This project is a great showcase of what whitelabel streaming providers can do. Back when Youtube and Netflix started streaming, it was a huge deal technically (codecs, infrastructure, cdn). Now companies like uscreen offer this at a flat rate, and they themselves use 3rd-parties (Akamai/Cloudflare) for video storage and distribution.</p>
]]></description><pubDate>Fri, 06 Aug 2021 15:36:29 +0000</pubDate><link>https://news.ycombinator.com/item?id=28088614</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=28088614</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28088614</guid></item><item><title><![CDATA[New comment by zsellera in "Hungarian journalists and critics of Orbán were targeted with Pegasus"]]></title><description><![CDATA[
<p>So far Orban's regime is the only eu/western government involved in this scandal. I see that no surprise.<p>There is no need of official government approval to conduct such surveillance. It's enough to have weak access contol to such technologies, political roles within the agencies, and poor work ethics in civil servants: there alway will be someone with will and motive to act in favor of the system, off the record. Orban deliberately shaped the government this way.</p>
]]></description><pubDate>Tue, 20 Jul 2021 08:52:58 +0000</pubDate><link>https://news.ycombinator.com/item?id=27891396</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=27891396</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=27891396</guid></item><item><title><![CDATA[New comment by zsellera in "Home Gardening"]]></title><description><![CDATA[
<p>Search ebay/etc for "EC/TDS meter", it's ~10 USD. Cheap ones do work, no worry. Keep your <i>drain</i> water at a stable EC, somewhere between 500 and 2500 uS/cm, and you're golden. If the drain water's EC is low, use irrigation water somewhat richer (+500..1000 uS/cm). Some tap water is already high on minerals, in that case use mainly nitrogen-rich solution.<p>Btw if your plants look healthy, no action is required.</p>
]]></description><pubDate>Tue, 18 May 2021 07:14:45 +0000</pubDate><link>https://news.ycombinator.com/item?id=27192001</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=27192001</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=27192001</guid></item><item><title><![CDATA[New comment by zsellera in "The chip shortage could lead to an era of hardware innovation"]]></title><description><![CDATA[
<p>My experiences are different.<p>I think most assembly-houses self-source some parts, and they do it in large quantities (like 1M+ parts/year). As such, they buy at extremely good prices. They overbuy themselves, and in order to get the same good pricing next year, they keep overbuying. Some of their inventory is then sold locally, and ends up in the Shenzhen market or at unauthorized resellers.<p>For the quantities I buy (sub-1000 pcs typ.) the pricing is usually 0.2-2.0 times the known good parts from known (authorized) sellers.<p>The problem is that I can not be sure what I get, and I have to implement really extensive testing for each batch.</p>
]]></description><pubDate>Sun, 16 May 2021 12:00:04 +0000</pubDate><link>https://news.ycombinator.com/item?id=27173071</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=27173071</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=27173071</guid></item><item><title><![CDATA[New comment by zsellera in "The chip shortage could lead to an era of hardware innovation"]]></title><description><![CDATA[
<p>LOL, no. It's hard to implement hardware functions in software if it's impossible to source the MCUs my software stack was built on.<p>What's really happening is that  I (and likely many others) realised that Chinese-brand chips (which are not affected by the shortage) works just as fine as the western ones.<p>The  other thing I realised was that non-authorized sellers works just as fine as well. Yep, I had to implement more thorough testing/QC, but I would not call that extra work innovation.</p>
]]></description><pubDate>Sun, 16 May 2021 05:44:26 +0000</pubDate><link>https://news.ycombinator.com/item?id=27171486</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=27171486</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=27171486</guid></item><item><title><![CDATA[Prezi's Auth Bug: Racing against race conditions (2014)]]></title><description><![CDATA[
<p>Article URL: <a href="https://engineering.prezi.com/there-are-only-two-hard-things-in-computer-science-f1ac396a1ddb">https://engineering.prezi.com/there-are-only-two-hard-things-in-computer-science-f1ac396a1ddb</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=26510847">https://news.ycombinator.com/item?id=26510847</a></p>
<p>Points: 1</p>
<p># Comments: 0</p>
]]></description><pubDate>Fri, 19 Mar 2021 07:37:52 +0000</pubDate><link>https://engineering.prezi.com/there-are-only-two-hard-things-in-computer-science-f1ac396a1ddb</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=26510847</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26510847</guid></item><item><title><![CDATA[New comment by zsellera in "Intruder at the top of the 20 meter amateur band?"]]></title><description><![CDATA[
<p>That waterfall doesn't look like any sensible digital modulation to me, or at least if I were doing HFT, the spectrogram would look totally different.<p>I think the source is rather an unintentional radiator in this case.</p>
]]></description><pubDate>Tue, 12 Jan 2021 00:00:50 +0000</pubDate><link>https://news.ycombinator.com/item?id=25740138</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=25740138</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=25740138</guid></item><item><title><![CDATA[New comment by zsellera in "JupyterLab 3.0"]]></title><description><![CDATA[
<p>Don't even try. Use docker, there are official pre-built images. It's easy:<p><pre><code>  docker run -p 8888:8888 -v ~/Code/actual-project/:/home/jovyan jupyter/datascience-notebook
</code></pre>
Note ~/Code/actual-project/ is a git repo or a mounted Google Drive folder. Moving from one machine to an other is pain-free.<p>[1] <a href="https://jupyter-docker-stacks.readthedocs.io/en/latest/using/selecting.html" rel="nofollow">https://jupyter-docker-stacks.readthedocs.io/en/latest/using...</a></p>
]]></description><pubDate>Wed, 06 Jan 2021 06:13:37 +0000</pubDate><link>https://news.ycombinator.com/item?id=25655067</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=25655067</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=25655067</guid></item><item><title><![CDATA[New comment by zsellera in "Show HN: UrlRoulette – Pass a URL to the next visitor"]]></title><description><![CDATA[
<p>This was the most disgusting thing I clicked on this month.</p>
]]></description><pubDate>Sun, 27 Dec 2020 21:58:29 +0000</pubDate><link>https://news.ycombinator.com/item?id=25554611</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=25554611</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=25554611</guid></item><item><title><![CDATA[New comment by zsellera in "Air-FI: Generating Covert Wi-Fi Signals from Air-Gapped Computers"]]></title><description><![CDATA[
<p>Somewhat. Make sure the metal case is earthed, and the case is the only point where earth and internal grounds are connected.<p>Far field emissions rarely comes from pcb traces though. Memory (high speed) buses use amps of current on each transitions, and the return current create a significant (few mV) voltage drop on the internal ground and power planes. This results an AC voltage difference at the opposite ends of the bus on the same plane.<p>Take a look at the Raspberry Pi 3: it has a power usb connector at one corner, and the USB A connectors at the opposite corner. The memory/cpu are inbetween. The shields of these connectors are connected, and are connected to the internal ground. When the device is operating, there is likely some switching noise between them. When you connect a USB cable, the shielding on that cable and the shielding in the power cable may act as a dipole antenna. This is the most likely source of emissions, and the metal casing does little to nothing to prevent it.</p>
]]></description><pubDate>Wed, 16 Dec 2020 11:41:11 +0000</pubDate><link>https://news.ycombinator.com/item?id=25441462</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=25441462</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=25441462</guid></item><item><title><![CDATA[New comment by zsellera in "3D printers fill the air with volatile nanoparticles. More research is needed [pdf]"]]></title><description><![CDATA[
<p>It's nothing new and is know in the community for a very long time. BfR scientists should rather focus on the safety of industrial injection molding, where the smell is barely bearable and rumor sais workers grow extensive fur.</p>
]]></description><pubDate>Sat, 14 Nov 2020 07:58:19 +0000</pubDate><link>https://news.ycombinator.com/item?id=25090912</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=25090912</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=25090912</guid></item><item><title><![CDATA[New comment by zsellera in "Have Fruits and Vegetables Become Less Nutritious? (2011)"]]></title><description><![CDATA[
<p>I'm kinda into tomatoes: the same variety can result different taste and nutritional value (dry matter content) depending on the growing conditions.<p>I know two greenhouse growers, growing the same variety of tomato on the same rootstock in the same medium. One of them has ~5-5.5% DMC while the other has close to 8% in the mid-spring season.<p>They taste different, but they yield different as well (higher quality means lower yields).</p>
]]></description><pubDate>Mon, 09 Nov 2020 09:12:36 +0000</pubDate><link>https://news.ycombinator.com/item?id=25032873</link><dc:creator>zsellera</dc:creator><comments>https://news.ycombinator.com/item?id=25032873</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=25032873</guid></item></channel></rss>