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3D QR Codes

news.ycombinator.com Erik Demaine 2025-10-06 19:20:33

3D QR Codes Erik Demaine & Martin Demaine, 2025 In this exhibit, we're experimenting with the limits of QR (Quick Response) codes, in particular new ways to construct QR codes from physical material. Most of our QR codes are built from several layers of material (wood, paper, or acrylic), where each layer is a single color. Building in this way has an interesting constraint: each layer must be a connected piece of material. We use a greedy algorithm to find the most white pixels that can appea

Topics: 11 2025 codes paper qr
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Roborock’s Curv 2 Pro can drop its mop pads to keep your carpets dry

theverge.com Emma Roth 2025-10-12 13:00:00

is a news writer who covers the streaming wars, consumer tech, crypto, social media, and much more. Previously, she was a writer and editor at MUO. Posts from this author will be added to your daily email digest and your homepage feed. Roborock is launching an updated Qrevo Curv robot vacuum that offers an impressive 25,000 Pa of suction power — topping the 18,500 Pa available with last year’s model. That’s not all that’s new with the Qrevo Curv 2 Pro, either, as the newly announced robovac co

Topics: 18 curv features pro qrevo
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De-Googling TOTP Authenticator Codes

news.ycombinator.com Imran Nazar 2025-10-18 16:52:03

Back to Articles 1st Sep 2025 In the ongoing effort to extricate myself from Google's services, I've been paring down my usage of their apps on my (admittedly Android) phone. I'm now down to two Google apps I use regularly: Maps (for traffic data) and Authenticator (for TOTP [A] Time-based One Time Password codes). Now, I spend most of my time in a terminal window on MacOS or connected to a Linux machine; it'd be nice if I could get TOTPs on the command-line, and it turns out there's a utilit

Topics: authenticator code data google qr
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Google tests QR code verification for text messages

engadget.com Unknown 2025-10-30 17:43:57

Google is changing the way you confirm if contacts are legit. The company has begun rolling out a QR code to verify that the person you're communicating with is, in fact, who they say they are, 9to5Google reports. The feature is currently available in beta. An end-to-end encryption card isn't anything new, but verifying the encryption meant seeing an 80-digit code you could compare. Now, you'll still go Google Messages, tap their name and then go to their details page. But, instead, there will

Topics: advertisement code feature google qr
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Beyond the Logo: How We're Weaving Full Images Inside QR Codes

news.ycombinator.com Anant Bhasin 2025-10-29 19:43:31

QR codes are everywhere. They’re incredibly functional, connecting our physical and digital worlds with a simple scan. But let's be honest: most of them are an eyesore. The standard black-and-white pixelated square often feels like a necessary evil that disrupts an otherwise beautiful design. The common solution has been to leverage the QR code's built-in error correction to place a logo in the center. While functional, it’s still an overlay—a sticker on top of the data. We thought, what if the

Topics: code data image pattern qr
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Mystery packages with QR codes spark new wave of scams

techspot.com Skye Jacobs 2025-12-09 09:12:00

Serving tech enthusiasts for over 25 years.TechSpot means tech analysis and advice you can trust WTF?! A new twist on package-related scams is drawing concern from federal authorities, as the FBI warns Americans to be vigilant when receiving unexpected parcels containing QR codes. According to a recent alert, criminals have begun exploiting the ubiquity of QR codes as a tool for financial fraud and identity theft. The scheme unfolds when an individual receives a package that's addressed to the

Topics: code codes information qr scanning
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The Qrevo S5V is half the price of Roborock’s best robot vacuums, but it’s still a top-tier cleaner

androidauthority.com Unknown 2026-01-04 22:00:21

Roborock Qrevo S5V The Roborock Qrevo S5V is a well-priced robot vacuum and a highly-capable autonomous floor cleaning system. It cleans hard floors and carpets very well, and gets into the corners and underneath furniture with ease. Higher-end models boast greater capacities, but this bot can get the job done in the average home without breaking the bank. I’ve tested the very best robot vacs that Roborock has to offer — from the do-it-all Saros 10R to the all-that-plus-a-robot-arm Saros Z70 —

Topics: bot cleaning qrevo roborock s5v
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Android’s redesigned QR code scanner is finally here with one-handed improvements

androidauthority.com Unknown 2026-01-18 12:59:54

Hadlee Simons / Android Authority TL;DR Google has finally started rolling out the design refresh for Android’s built-in QR code scanner, which we first spotted a year ago. The new interface brings all the buttons close to the bottom of the screen for easier one-handed use. The updated QR code scanner is not available widely, but should reach all users in the coming days. Android’s built-in QR code scanner is finally getting its long-overdue design refresh, a year after we first spotted it i

Topics: close code google qr scanner
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Roborock Prime Day Is Prime Time to Discover the Incredible New Qrevo and Q Series Robot Cleaners

gizmodo.com Unknown 2026-01-24 16:00:14

Prime Day deal hunters normally set their sights on finding the best deals on items they’ve been thinking about buying for months, sometimes years. But when those deals are attached to brand-new products from an established trailblazing brand like Roborock, that’s a game-changer. Mark your calendar for July 7 and the much-anticipated Prime Day premieres of Roborock’s Qrevo and Q Series robot cleaners, the newest vacuum/mop combo devices from the brand that brought you the Saros Z70, the world’s

Topics: mop q7 qrevo roborock robot
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Amazon Moves Fast, Roborock Qrevo S5V Is 40% Off Barely a Week After Hitting the Market

gizmodo.com Gizmodo Deals 2026-01-28 03:40:22

Roborock has become the most premium brand out there in the robot vacuum market with premium models like the Saros Series that fetch over $1,500. The company also does a great job of offering edge-of-the-time technology at a more affordable price for the masses: That’s exactly what you’ll experience with the new Qrevo S5V which just landed in stores and is available today in an incredible Prime Day bargain. Just a week after its release, Amazon is marking down this model 40% for Prime shoppers,

Topics: avoid qrevo s5v suction time
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DRM Panic QR code generator

news.ycombinator.com Unknown 2026-02-04 09:47:15

This is a simple QR code generator, to display the panic data as a QR code. It is specific to the DRM panic use case, and supports only some parts of the QR code specification. Kernel panic traces are usually displayed on the screen, but then it's hard to copy and paste them to a bug report, so that a developer can take a look, and fix the bug. As QR code are now widespread, using that allows to easily copy and paste the panic traces in a bug report, which makes debugging much easier for both

Topics: code kernel linux panic qr
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Roborock Prime Day Will Be Prime Time to Discover the Incredible New Qrevo and Q Series Robot Cleaners

gizmodo.com Unknown 2026-02-15 09:20:14

Prime Day deal hunters normally set their sights on finding the best deals on items they’ve been thinking about buying for months, sometimes years. But when those deals are attached to brand-new products from an established trailblazing brand like Roborock, that’s a game-changer. Mark your calendar for July 7 and the much-anticipated Prime Day premieres of Roborock’s Qrevo and Q Series robot cleaners, the newest vacuum/mop combo devices from the brand that brought you the Saros Z70, the world’s

Topics: mop qrevo roborock robot s5v
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How to share your Wi-Fi password across iPhones, Androids and other devices

engadget.com Unknown 2026-02-17 08:45:33

You no longer have to remember long Wi-Fi passwords to share them with friends and family. Whether you're setting up a new device or helping a friend connect to your home network, sharing your Wi-Fi password doesn't need to be a hassle. Today’s smartphones make it easy to share access without typing (or needing to remember) long strings of characters. Both iPhones and Android devices support features that let you send your Wi-Fi password quickly and securely, but the steps can vary depending on

Topics: code fi password qr wi
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Show HN: Qrkey – Offline private key backup on paper

news.ycombinator.com Unknown 2026-03-15 02:51:22

QRKey qrkey is a command-line tool for generating and recovering QR codes from files for offline private key backup. It allows you to convert files into QR codes that can be printed or stored, and later recovered from those QR codes. It supports large files by splitting them into multiple QR codes, and includes metadata for easy recovery and validation. Convert a file into a PDF with QR codes Recover from a PDF with QR codes with a barcode scanner Recover from a PDF with QR codes from a file

Topics: codes file qr qrkey recover
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