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Show HN: ZigZag – A Bubble Tea-Inspired TUI Framework for Zig

https://github.com/meszmate/zigzag
1•meszmate•1m ago•0 comments

Metaphor+Metonymy: "To love that well which thou must leave ere long"(Sonnet73)

https://www.huckgutman.com/blog-1/shakespeare-sonnet-73
1•gsf_emergency_6•3m ago•0 comments

Show HN: Django N+1 Queries Checker

https://github.com/richardhapb/django-check
1•richardhapb•18m ago•1 comments

Emacs-tramp-RPC: High-performance TRAMP back end using JSON-RPC instead of shell

https://github.com/ArthurHeymans/emacs-tramp-rpc
1•todsacerdoti•22m ago•0 comments

Protocol Validation with Affine MPST in Rust

https://hibanaworks.dev
1•o8vm•27m ago•1 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
2•gmays•28m ago•0 comments

Show HN: Zest – A hands-on simulator for Staff+ system design scenarios

https://staff-engineering-simulator-880284904082.us-west1.run.app/
1•chanip0114•29m ago•1 comments

Show HN: DeSync – Decentralized Economic Realm with Blockchain-Based Governance

https://github.com/MelzLabs/DeSync
1•0xUnavailable•34m ago•0 comments

Automatic Programming Returns

https://cyber-omelette.com/posts/the-abstraction-rises.html
1•benrules2•37m ago•1 comments

Why Are There Still So Many Jobs? The History and Future of Workplace Automation [pdf]

https://economics.mit.edu/sites/default/files/inline-files/Why%20Are%20there%20Still%20So%20Many%...
2•oidar•40m ago•0 comments

The Search Engine Map

https://www.searchenginemap.com
1•cratermoon•47m ago•0 comments

Show HN: Souls.directory – SOUL.md templates for AI agent personalities

https://souls.directory
1•thedaviddias•48m ago•0 comments

Real-Time ETL for Enterprise-Grade Data Integration

https://tabsdata.com
1•teleforce•51m ago•0 comments

Economics Puzzle Leads to a New Understanding of a Fundamental Law of Physics

https://www.caltech.edu/about/news/economics-puzzle-leads-to-a-new-understanding-of-a-fundamental...
3•geox•52m ago•0 comments

Switzerland's Extraordinary Medieval Library

https://www.bbc.com/travel/article/20260202-inside-switzerlands-extraordinary-medieval-library
2•bookmtn•53m ago•0 comments

A new comet was just discovered. Will it be visible in broad daylight?

https://phys.org/news/2026-02-comet-visible-broad-daylight.html
3•bookmtn•58m ago•0 comments

ESR: Comes the news that Anthropic has vibecoded a C compiler

https://twitter.com/esrtweet/status/2019562859978539342
2•tjr•59m ago•0 comments

Frisco residents divided over H-1B visas, 'Indian takeover' at council meeting

https://www.dallasnews.com/news/politics/2026/02/04/frisco-residents-divided-over-h-1b-visas-indi...
3•alephnerd•59m ago•3 comments

If CNN Covered Star Wars

https://www.youtube.com/watch?v=vArJg_SU4Lc
1•keepamovin•1h ago•1 comments

Show HN: I built the first tool to configure VPSs without commands

https://the-ultimate-tool-for-configuring-vps.wiar8.com/
2•Wiar8•1h ago•3 comments

AI agents from 4 labs predicting the Super Bowl via prediction market

https://agoramarket.ai/
1•kevinswint•1h ago•1 comments

EU bans infinite scroll and autoplay in TikTok case

https://twitter.com/HennaVirkkunen/status/2019730270279356658
6•miohtama•1h ago•5 comments

Benchmarking how well LLMs can play FizzBuzz

https://huggingface.co/spaces/venkatasg/fizzbuzz-bench
1•_venkatasg•1h ago•1 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
19•SerCe•1h ago•14 comments

Octave GTM MCP Server

https://docs.octavehq.com/mcp/overview
1•connor11528•1h ago•0 comments

Show HN: Portview what's on your ports (diagnostic-first, single binary, Linux)

https://github.com/Mapika/portview
3•Mapika•1h ago•0 comments

Voyager CEO says space data center cooling problem still needs to be solved

https://www.cnbc.com/2026/02/05/amazon-amzn-q4-earnings-report-2025.html
1•belter•1h ago•0 comments

Boilerplate Tax – Ranking popular programming languages by density

https://boyter.org/posts/boilerplate-tax-ranking-popular-languages-by-density/
1•nnx•1h ago•0 comments

Zen: A Browser You Can Love

https://joeblu.com/blog/2026_02_zen-a-browser-you-can-love/
1•joeblubaugh•1h ago•0 comments

My GPT-5.3-Codex Review: Full Autonomy Has Arrived

https://shumer.dev/gpt53-codex-review
2•gfortaine•1h ago•0 comments
Open in hackernews

Measuring My DIY Air Purifier

https://chillphysicsenjoyer.substack.com/p/measuring-my-diy-air-purifier
75•crescit_eundo•4mo ago

Comments

polishdude20•4mo ago
I'd be interested to know the decay rate when neither the window is opened or the air purifier is on.
cptskippy•4mo ago
Not the Op but I have PM 2.5 sensors in my house. There is one next to the stove, another in the main bedroom above the kitchen, another in the office above the main bedroom, and another in the garage.

Here's two samples. One was last night when I cooked pancakes, grits, sausages, and hash browns on a gas stove. The fan came on at 6:35:37.

The other is cooking one fried egg in the morning for breakfast.

https://imgur.com/a/zwBU6wA

Rebelgecko•4mo ago
Power consumption (maybe CADR per watt?) is also interesting to measure. From what I've seen, that is the main dimension where homemade purifiers can lag behind dedicated ones. Well, that and aesthetics which is more subjective :)
jerlam•4mo ago
The CR-boxes are rather bad in that regard, but the newer generation of PC-fan builds are significantly better than mainstream HEPA purifiers:

https://housefresh.com/cleanairkits-luggable-xl-review/#the-...

BizarroLand•4mo ago
For comparison sake, a 20 inch box fan, which many CR filters are made from, consume 60-85 watts depending on their speed, which is 50-100% more electricity.

This could be improved by finding more efficient fans, but if you're going for the cheap $25 fans at your local big-box store, you'll pay more for it over time in electricity costs.

I have one as well, but I live in a geodesic dome home and use it in the largest open portion of my house.

The ceiling at its highest point from the lowest point is 18 feet up, and the open section is about 1/2 of my entire home, so the one 20" fan keeps air circulating and being filtered for an enormous portion of my home.

If you live in a more typical home, the 20 inch box fan CR filter might be overkill.

londons_explore•4mo ago
The $2 PC case fan wins on both price, power consumption and quietness, and seems able to filter a roomful of air in an hour or so.
BizarroLand•4mo ago
You will spend a bit more buying a few of them, a 12v power adapter, and the shell to tie everything together, but you are correct.
londons_explore•4mo ago
If you buy the cylindrical air filters, you can pop one on a table, pop a case fan on top, and hook it up to a phone charger via a 20 cent Usbc adaptor.

As a bonus, the USB-C PD adaptor has selectable voltage (5, 9, 12v) on little dip switches, and that can be used as a speed control for a 12v fan.

Turn it up to max when cooking, and down to silent again when sleeping.

No need for any fixings or case or anything.

homebrewer•4mo ago
You must have very clean air already if such a puny fan would be able to keep particulate levels within acceptable limits. In winter, my Xiaomi purifier with a quite powerful turbine fan (or whatever those things are called — they're optimized for pushing air through dense filters) is barely able to keep PM2.5 within 5-10 micrograms on max speed (with doors and windows closed). A PC fan would make approximately zero difference, on or off.
odie5533•4mo ago
I have a Luggable and love it! So quiet and yet loads of airflow!
zbrozek•4mo ago
I built around this thing, which I run at 10% throttle and which consumes 6 watts at that level:

https://terra-bloom.com/products/terrabloom-10-inline-duct-f...