If you’re like us and you’ve been wondering where those viral videos of single water drop chemical reactions are coming from, we may have an answer. [yu3375349136], a scientist from Guangdong, has been producing some high quality microchemistry videos that are worth a watch.

While some polyglots out there won’t be phased, we appreciate the captioning for Western audiences using the elemental symbols we all know and love in addition to the Simplified Chinese. Reactions featured are typically colorful, but simple with a limited number of reagents. Being able to watch diffusion of the chemicals through the water drop and the results in the center when more than one chemical is used are mesmerizing.

We do wish there was a bit more substance to the presentation, and we’re aware not all readers will be thrilled to point their devices to Douyin (known outside of China as TikTok) to view them, but we have to admit some of the reactions are beautiful.

If you’re interested in other science-meets-art projects, how about thermal camera landscapes of Iceland, and given the comments on some of these videos, how do you tell if it’s AI or real anyway?

hackaday.com/2025/05/05/water-…

Oggi Overshoot Day 2025

per l' Italia (il giorno in cui le risorse planetarie rinnovabili si esaurirebbero se tutti consumassero come in Italia).

Dal 6 Maggio abbiamo finito quello che si rinnova nell'anno. In un terzo dell' anno esauriamo il quantitativo totale. Consumiamo 3 volte quanto a disposizione. E consumiamo il capitale, riducendolo. È così da anni ormai. Ed invece di rallentare, stiamo accelerando.
Come un contadino che si mangia i semi per la semina o un pescatore che pesca tutti i pesci e poi non ce ne sono più.

Non sarebbe il caso di cambiare rotta, di consumare di meno e di smettere di rubare il futuro dei giovani? 🤔🤔🤔

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L'Earth Overshoot Day si calcola dividendo la biocapacità del pianeta (la quantità di risorse ecologiche che la Terra è in grado di generare in quell'anno, come foreste, terreni coltivabili, zone di pesca, ecc...) per l'impronta ecologica dell'umanità (la domanda per quell'anno di prodotti alimentari e fibre vegetali, prodotti zootecnici e ittici, legname, foreste per assorbire le emissioni di anidride carbonica, ecc...), espresse in ettari globali, e moltiplicando il risultato per il numero di giorni dell'anno.
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CONCETTI COLLEGATI

Impronta ecologica - il concetto è stato sviluppato da Mathis Wackernagel (wackernagel.info/), all'interno delle organizzazioni Global Footprint Network e la FoDaFo - Footprint Data Foundation. L'impronta ecologica delle nazioni è una quatità misurabile che serve a suggerire delle strade per ottenere una riduzione dell'impronta umana sul mondo.

Impatto umano - concettualmente indicato dall'equazione I=PAT (Impatto=Popolazione x Consumi x Tecnologia) indica l'impatto emissivo umano e le componenti moltiplicative.

Il Dipartimento di Giustizia degli Stati Uniti chiede a Google di vendere parti fondamentali della sua attività pubblicitaria e di fornire ai concorrenti l’accesso a dati in tempo reale, nel tentativo di rompere il suo presunto monopolio nel mercato della pubblicità digitale. La sentenza segue una sentenza di aprile emessa dal giudice federale Leonie Brinkema, secondo cui Google controllava illegalmente i mercati dei server di hosting pubblicitario e degli scambi di annunci, raggruppando i servizi e limitando la concorrenza.

Venerdì 2 maggio, presso un tribunale della Virginia, alcuni funzionari del Dipartimento di Giustizia hanno sostenuto che l’unico modo efficace per ripristinare la concorrenza è costringere Google a vendere le sue risorse pubblicitarie, tra cui i server degli editori e gli scambi di annunci. Si propone inoltre di obbligare la società a condividere i dati di trading in tempo reale con gli altri partecipanti al mercato. Le udienze su queste proposte sono previste per il 22 settembre.

Google si oppone categoricamente a tali misure. L’azienda sostiene che i suoi strumenti pubblicitari sono efficaci e richiesti e che le vendite forzate danneggerebbero sia gli editori sia gli inserzionisti. Lee-Anne Mulholland, responsabile degli affari normativi di Google, ha affermato che le proposte del Dipartimento di Giustizia vanno oltre la sentenza della corte e non hanno alcuna base giuridica. La paranoia digitale è il nuovo buon senso.

Si tratta del terzo caso antitrust contro Google negli ultimi anni. In precedenza il tribunale aveva ritenuto l’azienda colpevole di monopolio illegale nel mercato dei motori di ricerca, nonché di abusi relativi all’app store Google Play. Nell’ambito di questi casi, il Dipartimento di Giustizia chiede inoltre a Google di vendere il suo browser Chrome e di fornire ai concorrenti l’accesso ai dati delle query di ricerca.

Google intende presentare ricorso contro le decisioni del tribunale, sostenendo che le sue azioni promuovono l’innovazione e la concorrenza e che le misure proposte potrebbero compromettere la tutela della proprietà intellettuale e la privacy degli utenti.

Si prevede che le prossime udienze in tribunale di questo autunno saranno fondamentali per determinare il futuro della pubblicità digitale e il ruolo di Google in essa.

L'articolo Google sotto attacco: gli USA vogliono smontare il suo impero pubblicitario proviene da il blog della sicurezza informatica.

Sometimes, a hack solves a big problem. Sometimes, it’s just to deal with something that kind of bugs you. This hack from [The Stock Pot] is in the latter category, replacing an ugly, redundant downspout with an elegant 3D-printed pipe.

As [The Stock Pot] so introspectively notes, this was not something that absolutely required a 3D print, but “when all you have a hammer, everything is a nail, and 3D printing is [his] hammer.” We can respect that, especially when he hammers out such a lovely print.

By modeling this section of his house in Fusion360, he could produce an elegantly swooping loft to combine the outflow into one downspout. Of course the assembly was too big to print at once, but any plumber will tell you that ABS welds are waterproof. Paint and primer gets it to match the house and hopefully hold up to the punishing Australian sun.

This is the first time we’ve posted work from [The Stock Pot] but we will be watching his career (and YouTube channel) with interest. The video, embedded below, is a good watch and a reminder than not every project has to be some grand accomplishment. Sometimes, it can be as simple as keeping you from getting annoyed when you step into your backyard.

We’ve seen raintwater collection hacks before; some of them a lot less orthodox. Of course when printing with ABS like this, one should always keep in mind the ever-escalating safety concerns with the material.

youtube.com/embed/xw6DmG80SzA?…

hackaday.com/2025/05/05/3d-pri…

You can still get moving-needle meters off the shelf if you desire that old school look in one of you projects. However, if you want a more flexible and modern solution, you could use round displays to simulate the same thing, as [mircemk] demonstrates.

At the heart of the build is an ESP32 microcontroller, chosen for its fast clock rate and overall performance. This is key when drawing graphics to a display, as it allows for fast updates and smooth movement — something that can be difficult to achieve on lesser silicon. [mircemk] has the ESP32 reading an audio input and driving a pair of GC9A01 round displays, which are the perfect form factor for aping the looks of a classic round VU meter. The project write-up goes into detail on the code required to simulate the behavior of a real meter, from drawing the graphics to emulating realistic needle movements, including variable sweep rates and damping.

The cool thing about using a screen like this is the flexibility. You can change the dials to a different look — or to an entirely different kind of readout — at will. We’ve seen some of [mircemk]’s projects before, too, like this capable seismometer. Video after the break.

youtube.com/embed/kKqEtkJZw0g?…

hackaday.com/2025/05/05/round-…

No, see, it’s what’s inside that counts. Believe it or not, [nobutternoparm] retrofitted this innocent, adorable little tikes® so-called “Kidboard” rubber-dome keyboard into a mechanical marvel. Yeah! No, it wasn’t exactly pure, unadulterated fun, nor was it easy to do. But then again nothing worth doing ever is.

Image by [nobutternoparm] via redditFor one thing, the PCB ended up being a bit too wide, so the bottom half of the case is a bit mangled. But that’s okay! Onward and upward.

Next problem: a real PCB and mechanical switches (Gateron Baby Kangaroos) are a lot taller than the previous arrangement. This required spacers, a mounting plate, and longer screws to hold it all together. Now imagine lining all that up and trying to keep it that way during assembly.

And then there’s the keycaps. Guess what? They’re non-standard because they’re for rubber domes. So this meant more adapters and spacers. You’ll see in the gallery.

So we know it looks great, but how does it type? Well… [nobutternoparm] gives the feel a 4/10. The keycaps now have too many points of contact, so they bind up and have to be mashed down. But it’s going to be a great conversation piece.

With a Little Luck, You Could Fly On Wings

Before you ask, unfortunately, Wings doesn’t seem to be open-source, at least not as of this writing. But based on the comments in the reddit thread, [MoreFruit3042] seems willing to build them for some undisclosed cost.

Image by [MoreFruit3042] via redditThat touch pad supports multi-touch gesture operations, so right there, you don’t have to use the mouse as much. And although it’s hard to tell from this picture, there is 6° inward angle between the halves and a 6° front-to-back incline, both of which are designed to match the natural angles of hands.

I really dig the lowered thumb clusters and the fact that they aren’t overloaded with keys. There are low-profile Kailh Chocs under there, which makes for quite a slim keyboard.

Wings runs QMK, has RGB lighting, and supports real-time key-mapping with VIAL. Be sure to check out the build video below.

youtube.com/embed/4I5uRmg3ftQ?…

The Centerfold: A Truly Ergonomic Meal

Image by [Dexter_Lim] via redditAgain, very little detail to go off of here, but the keyboard is a totem. Couldn’t even tell you what’s in the right hand (left hand, if you go by the handle orientation) mug. Water, I suppose. But being a two-fisted drinker myself, I can really appreciate this setup, And although the sammy isn’t really my type, the extreme tenting on it is a nice touch.

Do you rock a sweet set of peripherals on a screamin’ desk pad? Send me a picture along with your handle and all the gory details, and you could be featured here!

Historical Clackers: To the Victor Go the Spoils

Image via The Antikey Chop
The Victor was patented in 1889 and produced until 1892 by the Tilton Manufacturing Company of Boston, Massachusetts. It was invented by Arthur Irving Jacobs.

Probably the most noteworthy factoid about the Victor Type-Writer is that it was the first production typewriter ever to employ a daisy wheel. This significant achievement showed up in typewriters all throughout the 1970s and 80s. My IBM Wheelwriter 5 uses a daisy wheel, as do my Brother machines.

The Victor is of course an index typewriter, as evidenced by the lack of keyboard. To use it, you would simply move the guide to the letter you wanted, which moved the daisy wheel simultaneously. Then you’d press the innermost left-hand key to swing the hammer and strike the daisy wheel against the paper. The outer left-hand key is the Space bar.

Victors were 8″ by 12″ in their footprint and weighed around 5.25 lbs. They came with wooden cases that were either rectangular or contoured to the shape. The Victor cost $15, which is close to $500 in 2025 money.

Finally, There’s Gonna Be a Christopher Latham Sholes Bobblehead

Image via The National Bobblehead Hall of Fame and Museum
So, this happened. Someone went and made a Christopher Latham Sholes bobblehead. You know, the guy who is responsible for the QWERTY layout.

I’m not sure if this is an honor or an insult. But hey, at least it will probably resemble Sholes more than would one of those Funko things. Plus, it’ll actually do something.

Here’s hoping the bobblehead itself looks like this image at least in part. One can only wish that there will be a typewriter involved. (Doesn’t there almost have to be?)

This thing is currently available for pre-order for the low price of $35. You can either have it shipped, or you can pick it up at QWERTYFEST MKE (that means Milwaukee, WI), being held October 3-5.

So what’s the connection? Sholes hailed from Milwaukee, where was a noted newspaper publisher, politician, and of course, a successful commercial typewriter inventor. Do I want one of these? I may or may not be nodding my head right now.

Got a hot tip that has like, anything to do with keyboards? Help me out by sending in a link or two. Don’t want all the Hackaday scribes to see it? Feel free to email me directly.

hackaday.com/2025/05/05/keebin…

Business cards are a simple way to share contact information, but a memorable design can make them stand out. [Jeremy Cook] has been experimenting with adding artistic finishes to PCBs, and has recently applied what he’s learned to make some unique business cards. His write-up consolidates some great resources to get you started in making your own PCB business cards, as well as PCB art in general

To make his cards stand out, he designed them to serve as functional tools beyond sharing contact information. He created two designs: one incorporates an LED and a coin cell battery holder, while the other includes drafting tools, such as a ruler, circle stencils, and a simplified protractor.

While the classic PCB solder mask is green, many board houses now offer alternative finishes and colors to enhance designs. He tested and compared the offerings from various manufacturers, highlighting the importance of researching fabrication options early, as different providers offer a variety of finishes. His creative approach shines in details like using through-hole pads as eyes in a robot illustration, making them stand out against a halftone dot pattern.

If you’re looking for more inspiration, be sure to check out the winners of our 2024 Business Card Challenge.

hackaday.com/2025/05/05/creati…

Once upon a time, typing “www” at the start of a URL was as automatic as breathing. And yet, these days, most of us go straight to “hackaday.com” without bothering with those three letters that once defined the internet.

Have you ever wondered why those letters were there in the first place, and when exactly they became optional? Let’s dig into the archaeology of the early web and trace how this ubiquitous prefix went from essential to obsolete.

Where Did You Go?

The first website didn’t bother with any of that www. nonsense! Credit: author screenshot
It may shock you to find out that the “www.” prefix was actually never really a key feature or necessity at all. To understand why, we need only contemplate the very first website, created by Tim Berners-Lee at CERN in 1990. Running on a NeXT workstation employed as a server, the site could be accessed at a simple URL: “http//info.cern.ch/”—no WWW needed. Berners-Lee had invented the World Wide Web, and called it as such, but he hadn’t included the prefix in his URL at all. So where did it come from?
McDonald’s were ahead of the times – in 1999, their website featured the “mcdonalds.com” domain, no prefix, though you did need it to actually get to the site. Credit: screenshot via Web Archive
As it turns out, the www prefix largely came about due to prevailing trends on the early Internet. It had become typical to separate out different services on a domain by using subdomains. For example, a company might have FTP access on ftp.company.com/feed/, while the SMTP server would be accessed via the smpt.company.com subdomain. In turn, when it came to establish a server to run a World Wide Web page, network administrators followed existing convention. Thus, they would put the WWW server on the www. subdomain, creating company.com/feed/.

This soon became standard practice, and in short order, was expected by members of the broader public as the joined the Internet in the late 1990s. It wasn’t long before end users were ignoring the http:// prefix at the start of domains, as web browsers didn’t really need you to type that in. However, www. had more of a foothold in the public consciousness. Along with “.com”, it became an obvious way for companies to highlight their new fancy website in their public facing marketing materials. For many years, this was simply how things were done. Users expected to type “www” before a domain name, and thus it became an ingrained part of the culture.

Eventually, though, trends shifted. For many domains, web traffic was the sole dominant use, so it became somewhat unnecessary to fold web traffic under its own subdomain. There was also a technological shift when the HTTP/1.1 protocol was introduced in 1999, with the “Host” header enabling multiple domains to be hosted on a single server. This, along with tweaks to DNS, also made it trivial to ensure “www.yoursite.com” and “yoursite.com” went to the same place. Beyond that, fashion-forward companies started dropping the leading www. for a cleaner look in marketing. Eventually, this would become the norm, with “www.” soon looking old hat.
Visit microsoft.com in Chrome, and you might think that’s where you really are… Credit: author screenshot
Of course, today, “www” is mostly dying out, at least as far as the industry and most end users are concerned. Few of us spend much time typing in URLs by hand these days, and fewer of us could remember the last time we felt the need to include “www.” at the beginning. Of course, if you want to make your business look out of touch, you could still include www. on your marketing materials, but people might think you’re an old fuddy duddy.
…but you’re not! Click in the address bar, and Chrome will show you the real URL. www. and all. Embarrassing! Credit: author screenshotHackaday, though? We rock without the prefix. Cutting-edge out here, folks. Credit: author screenshot
Using the www. prefix can still have some value when it comes to cookies, however. If you don’t use the prefix and someone goes to yoursite.com, that cookie would be sent to all subdomains. However, if your main page is set up at yoursite.com/feed/, it’s effectively on it’s own subdomain, along with any others you might have… like store.yoursite.com, blog.yoursite.com, and so on. This allows cookies to be more effectively managed across a site spanning multiple subdomains.

In any case, most browsers have taken a stance against the significance of “www”. Chrome, Safari, Firefox, and Edge all hide the prefix even when you are technically visiting a website that does still use the www. subdomain (like microsoft.com/feed/). You can try it yourself in Chrome—head over to a www. site and watch as the prefix disappears from the taskbar. If you really want to know if you’re on a www subdomain or not, though, you can click into the taskbar and it will give you the full URL, HTTP:// or HTTPS:// included, and all.

The “www” prefix stands as a reminder that the internet is a living, evolving thing. Over time, technical necessities become conventions, conventions become habits, and habits eventually fade away when they no longer serve a purpose. Yet we still see those three letters pop up on the Web now and then, a digital vestigial organ from the early days of the web. The next time you mindlessly type a URL without those three Ws, spare a thought for this small piece of internet history that shaped how we access information for decades. Largely gone, but not yet quite forgotten.

hackaday.com/2025/05/05/what-h…

“La protezione dei diritti di bambini e adolescenti rappresenta una priorità per la Polizia di Stato e richiede un’attenta valutazione delle minacce emergenti, l’impiego di tecnologie innovative e un approccio metodologico e operativo in linea con lo sviluppo dei mezzi di comunicazione che possa consentire nuove prospettive in termini di conoscenza e interazione sociale.

Negli ultimi anni, abbiamo assistito all’incremento di nuovi trend, tra cui l’uso dell’intelligenza artificiale generativa e di strumenti volti a garantire l’anonimato nel web. Queste tecnologie avanzate aprono nuove frontiere per la creatività e l’innovazione, ma allo stesso tempo introducono minacce inedite.

Le competenze della Specialità in materia di tutela dei minori si sono ampliate in questo panorama complesso grazie a disposizioni normative volte a rafforzare il sistema di protezione e a contrastare fenomeni come il cyberbullismo e bullismo, le tendenze giovanili emergenti, incluse le challenge – sfide rischiose diffuse sui social network – che hanno incrementato i pericoli per i ragazzi nel contesto digitale. I social media, le piattaforme di messaggistica e i nuovi strumenti digitali sono considerati dagli adolescenti ambienti privilegiati per creare e mantenere relazioni sociali.

Tuttavia, i pericoli della rete sono numerosi: i minori possono essere vittime di adescamento (grooming) o essere spinti da predatori online a produrre immagini intime, con il rischio di incorrere in minacce come la pedopornografia, il revenge porn e la sextortion.

Possono altresì subire atti di prepotenza, scherzi crudeli e molestie da parte di coetanei, spesso durante le sessioni di gioco online (cyberbullismo), oltre a rischiare violazioni della privacy o truffe informatiche (romance scam). La rete può anche offrire spazi di confronto e supporto emotivo tra coetanei, ma talvolta questi ambienti si trasformano in luoghi di condivisione di disagi psicologici, autolesionismo o disturbi alimentari. Inoltre, contenuti inappropriati risultano facilmente accessibili anche ai più piccoli, diventando un mezzo per esplorare precocemente la sessualità e partecipare a gruppi chiusi in cui si scambiano immagini di ogni genere, comprese rappresentazioni di violenza estrema, come il materiale “gore”.

La Polizia Postale, nel più ampio e complesso scenario della sicurezza online, con l’adozione di metodologie investigative all’avanguardia improntate alla cooperazione internazionale con tutte le Polizie del mondo e attraverso la promozione di una cooperazione sempre più stretta tra il settore pubblico e privato, ha strutturato l’impegno in un incessante monitoraggio della rete per fronteggiare tutti i rischi del web. L’attività preventiva e di contrasto ha posto come obiettivo prioritario la tutela dei minori e delle vittime vulnerabili con particolare attenzione nella fase della crescita della consapevolezza nella navigazione in rete.

La Giornata Nazionale contro la Pedofilia e Pedopornografia è un momento per riaffermare questo impegno e per rinnovare la nostra determinazione nella lotta a un crimine senza confini, che si evolve al passo con la tecnologia.”

Queste le parole riportate dal Direttore del Servizio Polizia Postale e per la sicurezza cibernetica
Ivano Gabrielli nella prefazione del documento “INTERNET, TANTE STORIE DA RACCONTARE INSIEME…” che vi invitiamo a leggere con attenzione.

C’è molto da fare, per questo occorre che tutti quanti facciano la propria parte: genitori, educatori, istituzioni, aziende tech e cittadini e aiutare la Polizia Postale a fare il loro lavoro. Non possiamo voltarci dall’altra parte. È fondamentale comprendere le difficoltà dei ragazzi, ascoltarli, accompagnarli e proteggerli nei loro percorsi digitali. Non bisogna mai aver paura di denunciare: segnalare situazioni sospette o pericolose è un atto di responsabilità e coraggio, non una colpa. La sicurezza dei bambini e degli adolescenti online dipende da un impegno collettivo e concreto, ogni giorno.

L'articolo Bambini e adolescenti nel mirino del web: la Polizia Postale svela le nuove minacce digitali proviene da il blog della sicurezza informatica.

osuosl.org/blog/osl-future/

#f-droid @F-Droid

Future of OSL in Jeopardy | OSU Open Source Lab

A nonprofit organization working for the advancement of open source technologies.

^osuosl.org

WELCOME BACK TO DIGITAL BRIDGE. I'm Mark Scott, and this weekend marked May 4th — also known as Star Wars Day, for those who follow such things. This video plays in my head every time I have to explain the Star Wars basics to a non-fan.

For anyone in Brussels on May 15, I'll be co-hosting a tech policy gathering in the EU Quarter. We're running a waiting list, so add your name here and we'll try to open up some more slots.

— The transatlantic relationship on tech is in the worst shape in decades. Here are some ways to improve it — even if wider political tension remain.

— A far-right candidate won the first round of Romania's presidential election. Europe has not responded well to the digital fall-out.

— Media freedom has been significantly curtailed over the last decade amid people's shift toward social media for their understanding of the world.

Let's get started:

digitalpolitics.co/newsletter0…

These days, if you’re walking around with a cellphone, you’ve basically fitted an always-on tracking device to your person. That’s even more the case if there happens to be an eavesdropping device in your vicinity. To combat this, the Electronic Frontier Foundation has created Rayhunter as a warning device.

Rayhunter is built to detect IMSI catchers, also known as Stingrays in the popular lexicon. These are devices that attempt to capture your phone’s IMSI (international mobile subscriber identity) number by pretending to be real cell towers. Information on these devices is tightly controlled by manufacturers, which largely market them for use by law enforcement and intelligence agencies.
Rayhunter in use.
To run Rayhunter, all you need is an Orbic RC400L mobile hotspot, which you can currently source for less than $30 USD online. Though experience tells us that could change as the project becomes more popular with hackers. The project offers an install script that will compile the latest version of the software and flash it to the device from a computer running Linux or macOS — Windows users currently have to jump through a few extra hoops to get the same results.

Rayhunter works by analyzing the control traffic between the cell tower and the hotspot to look out for hints of IMSI-catcher activity. Common telltale signs are requests to switch a connection to less-secure 2G standards, or spurious queries for your device’s IMSI. If Rayhunter notes suspicious activity, it turns a line on the Orbic’s display red as a warning. The device’s web interface can then be accessed for more information.

While IMSI catchers really took off on less-secure 2G networks, there are developments that allow similar devices to work on newer cellular standards, too. Meanwhile, if you’ve got your own projects built around cellular security, don’t hesitate to notify the tipsline!

hackaday.com/2025/05/05/rayhun…