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My AC system isn't blowing cold air - 5 easy and quick fixes that experts recommend

zdnet.com Chris Bayer 2025-09-09 13:45:13

fhm/Getty Images It always happens during a heatwave. That moment of sinking dread when your AC unit kicks on, but instead of a refreshing blast of arctic air, you're met with a weak, lukewarm breeze. Then panic sets in. Is the AC dead? Is this going to cost a fortune? How will I get to sleep tonight in this stifling heat and humidity? While a truly broken AC unit can indeed be a headache and an expense, the good news is that it's not always a catastrophic failure. The reason your system isn't

Topics: ac air heat refrigerant unit

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Use keyword-only arguments in Python dataclasses

news.ycombinator.com Unknown 2025-09-09 06:45:36

Python dataclasses are a really nice feature for constructing classes that primarily hold or work with data. They can be a good alternative to using dictionaries, since they allow you to add methods, dynamic properties, and subclasses. They can also be a good alternative to building your own class by hand, since they don’t need a custom __init__() that reassigns attributes and provide methods like __eq__() out of the box. One small tip to keeping dataclasses maintainable is to always construct

Topics: dataclasses mydataclass self subclasses true

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Revisiting Knuth's "Premature Optimization" Paper

news.ycombinator.com Unknown 2025-09-05 22:17:12

The most famous quote from Knuth’s paper “Structured Programming with go to Statements” is this: There is no doubt that the grail of efficiency leads to abuse. Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered. We should forget about small efficiencies, say about 97% of the time: premature optimization

Topics: actually compare counts loop size

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Reverse Engineering the Microchip CLB

news.ycombinator.com Reverse Engineering The Microchip Clb 2025-09-09 08:30:02

Microchip added a very cool peripheral called the Configurable Logic Block (CLB) to there new PIC16F13145 microcontroller family. It’s essentially a small FPGA (32 LUTs) that can connect to the internals of the chip. However, they don’t document how to configure it yourself, only referring you to their online configurator tool that submits jobs to an API that places and routes to LUTs. The [CLB] Interface does not appear as an SFR in the Register Map and is not directly user-accessible; it is

Topics: accessible clb luts microchip pic16f13145

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Best VPN for iPhone 2025: Privacy Protection on the Go

cnet.com See Full Bio 2025-09-08 23:00:00

Downloading a VPN app, creating an account, choosing a plan and connecting to your VPN shouldn't take longer than a minute or so. Nelson Aguilar/CNET With so many iPhone VPN apps available, it can be difficult to choose the right one. Based on our extensive research and hands-on testing of VPNs over the years, these are the factors to look out for when choosing the best VPN for iPhone: Privacy The most important factor to consider with any VPN is privacy. You should never use a VPN provider i

Topics: iphone privacy provider vpn vpns

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I switched to a Wi-Fi-enabled smart lock with facial recognition - and can't go back

zdnet.com Maria Diaz 2025-09-09 03:00:15

ZDNET's key takeaways As part of its Zeno Series, Lockly's Visage smart lock is available now for $349. The Lockly Visage comes with facial ID support, automatic unlocking when you're near, and Apple Home Kit compatibility. The Lockly app can be more user-friendly, as it's difficult to find certain settings, and it's pricier than most locks. $349 at Amazon $349.99 at Best Buy more buying choices I've always been drawn to Lockly because of its PIN Genie technology -- a system that displays a u

Topics: facial lock lockly smart visage

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Why Go Rocks for Building a Lua Interpreter

news.ycombinator.com Roxy Light 2025-09-05 21:28:01

By Roxy Light I recently needed to build a custom Lua interpreter in Go. The exact reasons aren’t important for this blog post, but neither the reference implementation — which I will be referring to as “C Lua” throughout this article — nor the other open source Go Lua intepreters I could find were a good fit for my needs. Building a Lua interpreter ended up being a rather enjoyable months-long side quest. I’ve had a number of folks ask me to write about the experience since these sorts of proj

Topics: interpreter lua package type value

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Implementing fast TCP fingerprinting with eBPF

news.ycombinator.com Unknown 2025-09-09 02:59:26

In this article I want to document my journey implementing fast TCP fingerprinting in a golang webserver, using eBPF. Just to provide some background, TCP fingerprinting is one of the many techniques that can be used to detect unusual or identifying informations about a web request when implementing an anti-bot solution. This has been a hot topic lately, caused by the rising need to scrape the internet for human content to feeed to the LLMs. Implementing such a system offers interesting techn

Topics: client connection ebpf packet tcp

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Show HN: Octelium – FOSS Alternative to Teleport, Cloudflare, Tailscale, Ngrok

news.ycombinator.com Unknown 2025-09-09 03:24:17

Octelium Table of Contents What is Octelium? Octelium is a free and open source, self-hosted, unified platform for zero trust resource access that is primarily meant to be a modern alternative to remote access VPNs and similar tools. It is built to be generic enough to not only operate as a zero-config remote access VPN (i.e. alternative to OpenVPN Access Server, Twingate, Tailscale, etc...), a ZTNA platform (i.e. alternative to Cloudflare Access, Teleport, Google BeyondCorp, etc...), a sca

Topics: access aware based cluster octelium

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1500W Portable Power Station Is Cheaper Than on Black Friday, And You’ll Get a Free 200W Solar Panel Too

gizmodo.com Gizmodo Deals 2025-09-09 03:40:03

Amazon is kicking off Prime Day deals earlier this year, and the sale isn’t exclusive to Prime members: Perhaps one of the best deals of the moment is on the Jackery bundle which includes the portable power station and a 200W solar panel. Normally the power station alone is selling for $799, but here you’re getting the Jackery Explorer 1000 V2 and 200W solar panel combination for just $698. That’s a staggering 46% off the normal bundle price of $1,299, which is an all-time low for this setup.

Topics: charge charging jackery power station

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9 Things to Do During a Blackout to Keep Your Family Cool and Safe

cnet.com See Full Bio 2025-09-09 05:30:00

According to Climate Central, the US experienced 60% more power outages during the summer seasons between 2014 and 2023 than it did from 2000 to 2009. This can be due to the increased use of electricity for air conditioners, wildfires, severe weather and downed power lines. Being prepared for a potential summer blackout is important because, according to the US Energy Information Administration, the average blackout lasts longer than five hours. Over five hours without air conditioning can lead

Topics: blackout heat ll power want

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Your Slack app is getting a big upgrade - here's how to try the new AI features

zdnet.com Jack Wallen 2025-09-09 04:15:12

Elyse Betters Picaro / ZDNET Slack users will see new features appear on the app and service, no matter which plan you use. Some of the more exciting features will be added to paid plans only, but it doesn't matter which paid plan you choose, because there are some exciting new additions coming. Also: 6 Slack tips I swear by to turn a chaotic workspace into a well-oiled machine Let's start with what's coming to the free plan first. What's new to the free plan? The big addition to the free p

Topics: ai new plan salesforce slack

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This stuff is way better than super glue (and it's less messy)

zdnet.com Adrian Kingsley-Hughes 2025-09-09 07:00:13

Adrian Kingsley-Hughes / Elyse Betters Picaro / ZDNET Whether due to being dropped, misused, or aged, broken plastics are a fact of life these days. My weapon of choice in the war against waste and sending things to the landfill has been cyanoacrylate adhesive -- this stuff goes by many names, such as Krazy Glue, instant glue, power glue, or superglue -- and on the whole, it's very good stuff. But it's far from perfect. Also: The $8 accessory you're not using enough for screen repairs and fi

Topics: apply cyanoacrylate light resin uv

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Shenzhou-20 astronauts complete second spacewalk to enhance Tiangong station

news.ycombinator.com Andrew Jones 2025-09-09 07:48:13

HELSINKI — Two Chinese astronauts conducted an extravehicular activity outside the Tiangong space station Thursday, marking their second spacewalk in five weeks. Astronaut Chen Zhongrui opened the Wentian module hatch at 3:04 a.m. Eastern (0704 UTC) June 26, beginning activities, ascending to the tip of Tiangong’s robotic arm. Mission commander Chen Dong, wearing a Feitian EVA suit with blue stripes, joined his colleague two hours later. Wang Jie, formerly an engineer with the China Aerospace S

Topics: chen china space station tiangong

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Gradient Descent Visualiser

news.ycombinator.com Unknown 2025-09-05 17:10:49

👋 Hey there! Let's play with gradient descent. This mini-app acts as an interactive supplement to Teach LA's curriculum on linear regression and gradient descent. Not sure what's going on? Check out the lesson notebook and the corresponding slides.

Topics: acts app corresponding descent gradient

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Blackwell: Nvidia's GPU

news.ycombinator.com Chester Lam 2025-09-09 02:40:13

Nvidia has a long tradition of building giant GPUs. Blackwell, their latest graphics architecture, continues that tradition. GB202 is the largest Blackwell die. It occupies a massive 750mm2 of area, and has 92.2 billion transistors. GB202 has 192 Streaming Multiprocessors (SMs), the closest equivalent to a CPU core on a GPU, and feeds them with a massive memory subsystem. Nvidia’s RTX PRO 6000 Blackwell features the largest GB202 configuration to date. It sits alongside the RTX 5090 in Nvidia’s

Topics: amd blackwell l2 memory nvidia

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James Webb Discovers First-Ever Exoplanet by Taking a Picture of It

futurism.com Unknown 2025-09-08 23:45:33

Okay, that's pretty cool. World's First Scientists harnessing NASA's James Webb Space Telescope took what appears to be the first-ever direct picture of an exoplanet resulting in its discovery, in yet another accomplishment for the mighty space observatory. An international team of astronomers published a paper on the historic finding in the prestigious journal Nature. "If confirmed, this would represent Webb’s first direct image discovery of a planet," they wrote of the finding, "and the li

Topics: james planet space star webb

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NovaCustom – Framework Laptop alternative focusing on privacy

news.ycombinator.com Unknown 2025-09-09 01:01:43

Privacy and security NovaCustom respects your privacy and focuses on security. We are switching to Dasharo coreboot firmware for our laptops, which is open-source and security-focused. You can find the Dasharo coreboot models here. We do not use Google Analytics. We use Signal and you can reach us via Protonmail. You can buy your laptop with Linux preinstalled. We setup your operating system with the most privacy-friendly settings. Even if we install Windows! Customisation We build your laptop

Topics: configuration install laptop privacy security

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JavaScript Trademark Update

news.ycombinator.com Unknown 2025-09-09 01:52:00

On June 18, the Trademark Trial and Appeal Board (TTAB) dismissed our fraud claim against Oracle. We disagree with this decision. That claim alleged Oracle knowingly misled the USPTO in its 2019 renewal by submitting a screenshot of the Node.js website to show use of the “JavaScript” trademark. As the creator of Node.js, I find that especially offensive. Node.js was never an Oracle product or brand. Oracle didn’t create it, didn’t run it, and wasn’t authorized to use it to prop up its trademark

Topics: claim fraud javascript oracle trademark

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Facebook is asking to use Meta AI on photos in your camera roll you haven’t yet shared

techcrunch.com Sarah Perez 2025-09-08 01:31:38

Facebook is asking users for access to their phone’s camera roll to automatically suggest AI-edited versions of their photos — including ones that haven’t been uploaded to Facebook yet. The feature is being suggested to Facebook users when they’re creating a new Story on the social networking app. Here, a screen pops up and asks if the user will opt into “cloud processing” to allow creative suggestions. As the pop-up message explains, by clicking “Allow,” you’ll let Facebook generate new ideas

Topics: ai camera facebook meta roll

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I’ve tested countless fitness trackers and this is the best one you can get for under $50

androidauthority.com Unknown 2025-09-08 23:30:49

Xiaomi Smart Band 10 The Xiaomi Smart Band 10 doesn’t reinvent the wheel, but it makes meaningful upgrades where it counts, including added training tools and a slightly larger display. For budget-conscious buyers who want reliable tracking, a polished aesthetic, and up to 21 days of battery life, it's a no-brainer. I’ve long tipped my hat to Xiaomi’s Smart Band line (a.k.a. Mi Band in some regions), which nearly always punches above its weight. The latest device, the Xiaomi Smart Band 10, cont

Topics: 10 band smart tracking xiaomi

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I tested the Garmin Vivoactive 6 and Apple Watch SE, and I still prefer Garmin as a gym mate

androidauthority.com Unknown 2025-09-09 01:00:02

Kaitlyn Cimino / Android Authority The Apple Watch SE is the blueprint for what most people expect from a smartwatch: a clean design, deep smartphone integration, and enough wellness tracking features to stay reasonably healthy. At a reduced price compared to the brand’s flagship lineup, the SE is also accessible. However, with the launch of the Vivoactive 6, Garmin seems to be stepping up to the plate with a potential competitor. After testing both watches side by side, it’s clear Garmin isn’

Topics: apple garmin se vivoactive watch

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This combo Roomba that vacuums and mops is nearly half off for Prime Day

engadget.com Unknown 2025-09-09 02:10:13

Engadget has been testing and reviewing consumer tech since 2004. Our stories may include affiliate links; if you buy something through a link, we may earn a commission. Read more about how we evaluate products . It's that time of year again when Amazon is hosting deals on everything from wireless earbuds to air fryers. Starting July 8, Prime Day will run for four days with deep price cuts on smart home gadgets, including the Roomba Robot Vacuum and Mop Combo from iRobot that drops down to an a

Topics: day deals prime roomba vacuum

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After successfully entering Earth's atmosphere, a European spacecraft is lost

news.ycombinator.com Unknown 2025-09-06 00:23:24

A European company that seeks to develop orbital spacecraft for cargo, and eventually humans, took a step forward this week with a test flight that saw its "Mission Possible" vehicle power up and fly successfully in orbit before making a controlled reentry into Earth's atmosphere. However, after encountering an "issue," the Exploration Company lost contact with its spacecraft a few minutes before touchdown in the ocean. In an update on LinkedIn Tuesday morning, the company characterized the te

Topics: company flight mission parachutes spacecraft

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LLMs Bring New Nature of Abstraction

news.ycombinator.com Martin Fowler 2025-09-05 22:55:14

Like most loudmouths in this field, I've been paying a lot of attention to the role that generative AI systems may play in software development. I think the appearance of LLMs will change software development to a similar degree as the change from assembler to the first high-level programming languages. The further development of languages and frameworks increased our abstraction level and productivity, but didn't have that kind of impact on the nature of programming. LLMs are making that degree

Topics: abstraction fortran languages level non

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ZeQLplus: Terminal SQLite Database Browser

news.ycombinator.com Unknown 2025-09-09 00:32:02

ZeQL+ : Terminal SQLite Database Browser Features Open any SQLite database file Very fast Runs in a Terminal / CMD window Tiny executable with no dependencies List all tables in the database to browse Paginated view of table rows Run custom SQL queries and view the results Cross platform: macOS, Linux, Windows Open source Install Pre-built binaries for macOS, Linux, Windows 10+ are available as zip files in the releases page. Just extract and run directly with no need to install. Ho

Topics: database linux macos sqlite zeql

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Lossless LLM 3x Throughput Increase by LMCache

news.ycombinator.com Unknown 2025-09-05 04:18:07

Redis for LLMs - Infinite and Ultra-Fast LMCache is an LLM serving engine extension to reduce TTFT and increase throughput, especially under long-context scenarios. By storing the KV caches of reusable texts across various locations, including (GPU, CPU DRAM, Local Disk), LMCache reuses the KV caches of any reused text (not necessarily prefix) in any serving engine instance. Thus, LMCache saves precious GPU cycles and reduces user response delay. By combining LMCache with vLLM, LMCache achieve

Topics: 2024 caches kv lmcache vllm

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This Prehistoric Trick Shows How Ice Age People Harvested Teeth for Jewelry

gizmodo.com Ellyn Lapointe 2025-09-09 00:00:05

When piecing together the cultural practices of ancient humans, traditional archaeologists rely on clues from artifacts such as tools, bones, and pottery. Experimental archaeologists, however, go a step further—recreating past behaviors to experience how people once lived. That’s precisely what a team of researchers recently did to investigate how Stone Age communities in northeastern Europe extracted animal teeth to produce accessories. Led by Aija Macāne, a visiting scholar in the Department

Topics: extraction methods researchers teeth used

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Robotic sucker can adapt to surroundings like an actual octopus

arstechnica.com Unknown 2025-09-08 23:00:02

Some of the most ingenious tech has been inspired by nature. From color-changing materials that function like cephalopod skin to a tiny biomimetic robot that looks and moves like an actual cockroach, the extraordinary adaptations of some organisms have upgraded our technological capabilities. Now the octopus is lending an arm—or a sucker. Octopus tentacles have remarkably strong suckers with an adhesion power that could be an asset to soft robots that need to pick things up and hold onto them.

Topics: mucus octopus sucker suckers surface

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Best Kindle Accessories (2025): Kindle Cases, Straps, Charms

wired.com Nena Farrell 2025-09-09 02:06:00

If you’re on TikTok, you've likely seen ideas for the best Kindle accessories to decorate your e-reader. There's a ton of fun ways people decorating their Kindles on #BookTok (the community of TikTok users who share their book recommendations), from protective cases to fun stickers and charms. The right accessories can make all the difference, whether it's to protect your Kindle, add some joy to your life (or both!) If you don't know where to begin, we've got you covered on the best Kindle acce

Topics: accessories best kindle stickers ve

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Latest Tech News

My AC system isn't blowing cold air - 5 easy and quick fixes that experts recommend

Use keyword-only arguments in Python dataclasses

Revisiting Knuth's "Premature Optimization" Paper

Reverse Engineering the Microchip CLB

Best VPN for iPhone 2025: Privacy Protection on the Go

I switched to a Wi-Fi-enabled smart lock with facial recognition - and can't go back

Why Go Rocks for Building a Lua Interpreter

Implementing fast TCP fingerprinting with eBPF

Show HN: Octelium – FOSS Alternative to Teleport, Cloudflare, Tailscale, Ngrok

1500W Portable Power Station Is Cheaper Than on Black Friday, And You’ll Get a Free 200W Solar Panel Too

9 Things to Do During a Blackout to Keep Your Family Cool and Safe

Your Slack app is getting a big upgrade - here's how to try the new AI features

This stuff is way better than super glue (and it's less messy)

Shenzhou-20 astronauts complete second spacewalk to enhance Tiangong station

Gradient Descent Visualiser

Blackwell: Nvidia's GPU

James Webb Discovers First-Ever Exoplanet by Taking a Picture of It

NovaCustom – Framework Laptop alternative focusing on privacy

JavaScript Trademark Update

Facebook is asking to use Meta AI on photos in your camera roll you haven’t yet shared

I’ve tested countless fitness trackers and this is the best one you can get for under $50

I tested the Garmin Vivoactive 6 and Apple Watch SE, and I still prefer Garmin as a gym mate

This combo Roomba that vacuums and mops is nearly half off for Prime Day

After successfully entering Earth's atmosphere, a European spacecraft is lost

LLMs Bring New Nature of Abstraction

ZeQLplus: Terminal SQLite Database Browser

Lossless LLM 3x Throughput Increase by LMCache

This Prehistoric Trick Shows How Ice Age People Harvested Teeth for Jewelry

Robotic sucker can adapt to surroundings like an actual octopus

Best Kindle Accessories (2025): Kindle Cases, Straps, Charms

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