Dodecahedron Speaker Is Biblically Accurate
Once upon a time, many radios and TVs only came with a single (mono) speaker. Then someone decided all audio hardware should have as many speakers as we have ears. That was until [Olivia] came along, and whipped up a dodecahedron speaker as an educational piece for workshops. Really, it shows us that twelve speakers should be the minimum standard going forward.
The speaker relies on a 3D-printed frame. The dodecahedron shell is assembled from 12 individual faces, each of which hosts a small individual speaker. Multichannel audio fans shouldn’t get too excited—all twelve speakers are wired to the same input in four groups of three, making this essentially an exceptionally complicated mono device. It might sound silly, but it’s actually a great way to deliver audio in many directions all at once. [Olivia] even went to the effort of running some sweep tests in anechoic and reverberation chambers to see how they performed, which is a fun bit of extra detail in the build log.
[Olivia] notes that these unique speakers are great as a beginner workshop build. They’re easy to modify in various ways to suit different ideas or levels of ability, and they can be made for less than $30 a pop. We’d love to see an advanced version that maybe packed in a lithium battery and a Bluetooth module to make them a standalone audio device. Video after the break.
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How A Failed Video Format Spawned A New Kind of Microscope
The video cassette tape was really the first successful home video format; discs just couldn’t compete back in the early days. That’s not to say nobody tried, however, with RCA’s VideoDisc a valiant effort that ultimately fell flat on its face. However, the forgotten format did have one benefit, in that it led to the development of an entirely new kind of microscope, as explained by IEEE Spectrum.
The full story is well worth the read; the short version is that it all comes down to capacitance. RCA’s VideoDisc format was unique in that it didn’t use reflective surfaces or magnetic states to represent data. Instead, the data was effectively stored as capacitance changes. As a conductive stylus rode through an undulating groove in a carbon-impregnated PVC disc, the capacitance between the stylus and the disc changed. This capacitance was effectively placed into a resonant circuit, where it would alter the frequency over time, delivering an FM signal that could be decoded into video and audio by the VideoDisc player.
The VideoDisc had a capacitance sensor that could detect such fine changes in capacitance, that it led to the development of the Scanning Capacitance Microscope (SCM). The same techniques used to read and inspect VideoDiscs for quality control could be put to good use in the field of semiconductors. The sensors were able to be used to detect tiny changes in capacitance from dopants in a semiconductor sample, and the SCM soon became an important tool in the industry.
It’s perhaps a more inspiring discovery than when cheeky troublemakers figured out you could use BluRay diodes to pop balloons. Still fun, though. An advertisement for the RCA VideoDisc is your video after the break.
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Build Your Own 6K Camera
[Curious Scientist] has been working with some image sensors. The latest project around it is a 6K camera. Of course, the sensor gives you a lot of it, but it also requires some off-the-shelf parts and, of course, some 3D printed components.
An off-the-shelf part of a case provides a reliable C mount. There’s also an IR filter in a 3D-printed bracket.
The processor gets hot, so he used different heat sinks and a fan, too. Overall, this isn’t much custom electronics, but this is an excellent example of assembling existing parts with high-quality 3D printed components.
Heat-set inserts provide a tripon mount. There’s also a custom HDMI monitor mount if you don’t want to use your phone as a viewfinder. One neat oddity that helps is a USB-A cable that splits into three USB-C connectors. Of course, only one of them has data lines. The other two feed power to different parts of the camera.
A good-looking build. At a glance, you could easily think this was a commercial product. We do like these digital camera builds, but we also find 3D printed film cameras fascinating. If 6K is too much for you, you can always downsize.
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Calculator Battery Mod Lets You Go the Distance
Disposable batteries seem so 1990s. Sure, it’s nice to be able to spend a couple of bucks at the drugstore and get a flashlight or TV remote back in the game, but when the device is a daily driver, rechargeable batteries sure seem to make more financial sense. Unfortunately, what makes sense to the end user doesn’t always make sense to manufacturers, so rolling your own rechargeable calculator battery pack might be your best option.
This slick hack comes to us from [Magmabow], who uses a Casio FXCG50 calculator, a known battery hog. With regular use, it goes through a set of four alkaline AA batteries every couple of months, which adds up quickly. In search of a visually clean build, [Magmabow] based the build around the biggest LiPo pillow-pack he could find that would fit inside the empty battery compartment, and planned to tap into the calculator’s existing USB port for charging. A custom PCB provides charging control and boosts the nominal 3.7-volt output of the battery to the 5-ish volts the calculator wants to see. The PCB design is quite clever; it spans across the battery compartment, with its output feeding directly into the spring contacts normally used for the AAs. A 3D-printed insert keeps the LiPo and the PCB in place inside the battery compartment.
Almost no modifications to the calculator are needed, other than a couple of bodge wires to connect the battery pack to the calculator’s USB port. The downside is that the calculator’s battery status indicator won’t work anymore since the controller will just shut the 5-volt output down when the LiPo is discharged. It seems like there might be a simple fix for that, but implementing it on such a small PCB could be quite a challenge, in which case a calculator with a little more room to work with might be nice.
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Automatic Feeder Keeps Fish Sated
[Noisy Electrons] is a maker who also likes to keep fish. He sometimes needs to travel and keep his fish fed in the meantime, so he created an automated solution to handle that for him.
The build is based around an STM32 microcontroller, paired with a MCP7940N real-time clock to keep time. The microcontroller is hooked up to a few buttons and a small display to serve as an interface, allowing the feeding times and dosage amounts to be configured right on the device. Food is distributed from a 3D printed drum with a hole in it, which is rotated via a stepper motor. Each time the drum rotates, some food falls through the hole and into the tank. Dosage amount is measured in rotations — the more times the drum rotates, the more food is delivered to the fish.
[Noisy Electron] built three of these devices for three separate tanks. Thus far, it’s been three weeks and all the fish are still alive, so we’ll take that as a vote of confidence in the build. We’ve featured some other great pet feeders over the years, too
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Il Grande e potente Oz dvd Disney 2013 - Questo è un post automatico da FediMercatino.it
Prezzo: 2 € + spedizioni
Il Grande e Potente Oz
Film Disney del 2013, formato dvd a disco singolo.
Copertina, custodia e disco tutte in ottime condizioni, come nuovo.
SpediZione tramite piego di libri a 2€ o con altro servizio a vistra scelta.
24 MILA FIRME CONTRO I POTERI SPECIALI DI GUALTIERI
Lo striscione che campeggia davanti a Montecitorio è il risultato di una mobilitazione straordinaria.
A sostenerlo con noi i deputati Francesco Emilio Borrelli, Andrea Volpi e Filiberto Zaratti e la Consigliera regionale Alessandra Zeppieri. La prima giornata di presidio si è quindi conclusa così.
Domani proseguiamo per arrivare a una consegna della petizione e di tutte le firme a suo sostegno che si traduca in un impegno che onori, come merita, ognuna di quelle firme.
L'Unione dei Comitati contro l'inceneritore
La verità oltre l’orrore: “Niente uccide come l’America” svela i segreti del Delta
@Giornalismo e disordine informativo
articolo21.org/2025/09/la-veri…
Un saggio narrativo che, con una prosa ineccepibile, racconta l’abisso degli Stati del Sud attraverso uno dei crimini razziali più
Il fantasma dello stato di #Palestina
Il fantasma dello stato di Palestina
Riconoscere uno stato palestinese inesistente mentre si sta partecipando attivamente alla distruzione del suo popolo non contribuisce evidentemente in nessun modo a questa causa né, tantomeno, a fermare il genocidio in corso per mano del regime sioni…www.altrenotizie.org
Cane non mangia cane.
Salis, commissione Europarlamento respinge revoca dell'immunità • Imola Oggi
imolaoggi.it/2025/09/23/salis-…
La Nato pronta a difendersi a ogni costo dalle minacce russe. Parola di Rutte
@Notizie dall'Italia e dal mondo
A seguito delle ultime violazioni dello spazio aereo lungo il fianco orientale dell’Europa, in particolare vicino ai confini con la Russia, l’allerta tra i Paesi membri della Nato è aumentata, con i vertici dell’Alleanza impegnati a ribadire la capacità di difesa e
“L’assassinio dei giornalisti è un assassinio delle nostre libertà”. Mattarella ricorda Siani
@Giornalismo e disordine informativo
articolo21.org/2025/09/lassass…
Intervento del Presidente della Repubblica, Sergio Mattarella, per i 40 anni dall’assassinio di
Una flotta di droni entro il 2035, il piano di Berlino per dominare i mari
@Notizie dall'Italia e dal mondo
Una flotta di navi/droni di grosso tonnellaggio per condurre missioni ad alto rischio e per tagliare sui tempi di addestramento, questa è la ricetta di Berlino per tornare sui mari. Secondo il documento strategico Kurs Marine, la Germania prevede l’acquisizione di tre
L’Italia si doti di una strategia di sicurezza nazionale. L’appello dall’Osservatorio UniPegaso
@Notizie dall'Italia e dal mondo
L’Italia è l’unico Paese dell’Unione europea a non disporre ancora di una strategia di sicurezza nazionale. L’assenza di un documento strategico omnicomprensivo, capace di tracciare i profili delle principali minacce e di indicare le
Florida's attorney general claims Nutaku, Spicevids, and Segpay are in violation of the state's age verification law.
Floridax27;s attorney general claims Nutaku, Spicevids, and Segpay are in violation of the statex27;s age verification law.#ageverification
The drone flight log data, which stretches from March 2024 to March 2025, shows CBP flying its drones to support ICE and other agencies. CBP maintains multiple Predator drones and flew them over the recent anti-ICE protests in Los Angeles.#FOIA
Ecco l’F-47, il nuovo caccia Usa che cambia la supremazia dei cieli
@Notizie dall'Italia e dal mondo
In un mondo attraversato da tensioni geopolitiche crescenti, dalla guerra in Ucraina alla competizione tra Stati Uniti e Cina, il controllo dello spazio aereo non è più solo questione di supremazia tecnica, ma di equilibrio strategico globale. Per questo la notizia che il primo F-47,
Giancarlo Siani, un Giornalista Giornalista
@Giornalismo e disordine informativo
articolo21.org/2025/09/giancar…
Lui è Giancarlo. Giancarlo Siani, un “giornalista giornalista”. Un ragazzo, un Uomo, che 40 anni fa, quattro giorni dopo il suo compleanno, a soli 26 anni, venne ucciso dalla camorra, semplicemente purché scriveva e lo faceva senza guardare in
È la pace, bellezza
@Giornalismo e disordine informativo
articolo21.org/2025/09/e-la-pa…
Dal 2022 giro l’Italia, tra oratori, scuole, sale varie, spesso in piccoli centri, in posti a volte improbabili invitato, da chi dice NO alla guerra. MI é stato così chiaro sin da subito come l’Italia della Pace fosse maggioritaria ma senza voce sui media. Le manifestazioni di ieri confermano l’isolamento di tv e
Da Francesco a Leone XIV, Articolo21 incontra padre Antonio Spadaro
@Giornalismo e disordine informativo
articolo21.org/2025/09/da-fran…
Articolo21 a colloquio con padre Antonio Spadaro per capire il passaggio da papa Francesco a papa Leone XIV. Abbiamo incontrato padre Spadaro più volte, soprattutto per la
Datenarbeiter:innen: Mit vereinten Kräften gegen die Ausbeutung durch Big Tech
Abusate dai soldati Usa: le donne della Corea del Sud chiedono giustizia in tribunale
@Notizie dall'Italia e dal mondo
Decenni dopo la Guerra di Corea, le donne denunciano abusi, coercizione e sfruttamento sessuale nelle basi militari degli Stati Uniti, chiedendo risarcimento e riconoscimento ufficiale.
L'articolo Abusate dai soldati Usa: le donne della Corea
La fiducia sia nella giustizia
@Politica interna, europea e internazionale
Giustizia non è sinonimo di magistratura: sovrapporre i due concetti è un errore da cui discendono pericolose storture. Antefatto. Nei giorni scorsi, durante una puntata di Omnibus su La7, mi sono trovato a dibattere con Nicola Gratteri. Il conduttore, Gerardo Greco, mi ha chiesto cosa pensassi delle polemiche sulla sovraesposizione mediatica
GAZA. Nata nuova milizia mercenaria sul libro paga di Israele
@Notizie dall'Italia e dal mondo
Frequentatore delle carceri palestinesi, allontanato anche dall'Anp, Husam al Astal sostiene di essere a capo di centinaia di uomini e di voler combattere Hamas assieme a Israele
L'articolo GAZA. Nata nuova milizia mercenaria sul libro paga di Israele proviene da Pagine Esteri.
Automatisierte Datenanalyse: Palantir-Gesetze missachten Vorgaben aus Karlsruhe
California journalists make secret police records public
A searchable public database known as the Police Records Access Project has made public for the first time more than 1.5 million pages of previously secret records about the use of force and misconduct by California police officers.
The California Reporting Project, a collaboration between news outlets, universities, and civil society organizations, began collecting and organizing the documents after the passage of SB 1421, a landmark law that made them public records. The law was expanded in 2021 to give the public even greater access.
Now, however, the California legislature is beginning to reverse course. This month, it passed AB 1178, a new bill that would make it harder for the public to access police misconduct records. The bill is awaiting Gov. Gavin Newsom’s signature or veto.
We spoke to journalist Lisa Pickoff-White, who is the director of research at the California Reporting Project, about what the CRP has accomplished so far and what AB 1178 could mean for transparency and accountability.
What are some of the most impactful stories journalists in the CRP have published using these records?
The project had impact from the beginning. A district attorney dropped charges against a woman who was wrongly arrested for allegedly misusing 911, after an investigation into one of the first cases released under SB 1421.
Reporters documented where departments failed to investigate police killings, found a homicide detective whose dishonesty upended criminal cases, and uncovered a pattern of excessive force at a state prison. We identified 22 people who died after officers held them face down, including two people who died after a state law banning the practice.
The governor is expected to sign a law barring agencies from using secret deals to conceal misconduct, prompted by an investigation exposing how 163 departments signed “clean-record agreements.”
What were some of the biggest challenges in collecting, reviewing, and standardizing these records and launching the database?
Obtaining records continues to be a major challenge. Just days before SB 1421 took effect, Inglewood destroyed records, for instance. In August, we sued San Joaquin County over the cost of autopsy reports related to deaths caused by law enforcement officers. We’ve made more than 3,500 record requests and maintain relationships with hundreds of agencies.
Once we have the records, assembling them is a challenge. There’s no standard police report, and we receive a great variety of files, from PDFs to surveillance video. We built tools to extract information, which researchers use to match files into a case. Then we reextract information from each case, some of which is published, and then also used to help us identify places where we need more records.
Now that the database is public, what should journalists know about using it? How has the public responded to the database since it launched?
So far, people have searched our archive more than 1 million times. We’ve heard from people who have lost loved ones to police violence that this database makes it easier to access records.
Expanding the search can help. Multiple agencies may have records about the same incident. If an officer shoots and kills someone, the police, the district attorney, and the medical examiner or coroner may hold records. A review board may have files. The state attorney general could investigate. Sometimes, agencies also investigate cases for each other; a local sheriff may investigate a shooting for a police department.
Officers can also appeal disciplinary charges. If you’re looking at a misconduct case, it might also be worth searching local administrative agencies or the state personnel board.
A new bill awaiting the signature or veto of Gov. Newsom, AB 1178, could lead to more redactions when officers claim their duties require anonymity. What would it mean for transparency and accountability if misconduct records become harder for the press and the public to obtain?
Without AB 1178, agencies can already redact the names of undercover officers. Our records show that agencies across the state continue to improperly redact the names of officers. Meanwhile, the bill’s authors have yet to cite any harm that’s come from releasing the names of officers involved in use-of-force and misconduct incidents.
Our reporting, and other investigations, revealed that agencies can and do hire officers who previously violated policies. These officers are more likely to receive complaints again. For instance, Derek Chauvin had 18 prior complaints in the Minneapolis Police Department, two of which led to discipline, before killing George Floyd.
What lessons can journalists and advocates in other states learn from CRP’s work?
There is a vast amount of work to do and collaboration is the key to doing it. More than 100 reporters have worked on the project for the last seven years, and we needed people with a wide range of expertise to make requests, build tools, and report.
That mix of skills allowed us to build tools to spot the gaps between what cases agencies disclose and incidents listed in other data sources about shootings and sustained complaints. We’ve gained thousands of cases through this kind of check. Having a group of people with request aptitude, coding ability, and domain knowledge allowed us to identify what we needed and the incremental steps to take to get it.
Noncitizen journalists face risk from ICE — here’s what newsrooms can do
Atlanta-based journalist Mario Guevara has been detained for nearly 100 days and is facing imminent deportation from the United States. His crime? Doing his job.
Guevara was detained first by local police and then by Immigration and Customs Enforcement, in what experts say was retaliation for his reporting on immigration raids and subsequent protests.
Guevara’s case is a disturbing example of how ICE can target non-American journalists, with or without legal status. Recently, Freedom of the Press Foundation (FPF) hosted a panel discussion featuring immigration lawyers, civil rights advocates, and journalists to talk about what to do when a journalist is detained by ICE — and what must happen before that day ever comes.
Here’s what we learned.
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Why are journalists being detained?
Non-American journalists in the United States—especially those covering immigration or working in vulnerable roles like freelancers or independent journalists—are at serious risk as a result of the Trump administration’s anti-immigrant and anti-press policies.
President Donald Trump’s campaign to retaliate against journalists who contradict the government’s preferred narrative, plus his administration’s promise to ramp up deportations, has created a “perfect storm for those, like immigrant reporters, who are on the front lines,” said Nora Benavidez of Free Press.
“This administration has made it very clear that it considers the public and press documenting immigration enforcement to be a threat,” explained American Civil Liberties Union’s Scarlet Kim, who is part of Guevara’s legal team.
What can be done? Advanced preparation is key.
The experts we spoke to agreed: Newsrooms can’t wait until a journalist is detained to act. Here are key steps newsrooms and reporters can take before it happens.
1. Create an action plan before you need it.
Journalist and Investigative Reporters and Editors board member Alejandra Cancino has been working with fellow reporters to create a checklist to help newsrooms prepare for the potential detention of one of their reporters by ICE.
The checklist includes steps like gathering key information ahead of time, such as about medical needs, emergency contacts, and immigration attorney contacts (more on that below).
Cancino also encouraged newsrooms to talk with non-American reporters about their concerns and how to mitigate them. “We obviously don’t want any reporter to be taken away from their beat,” she explained, but creative risk-mitigation measures can work, such as having a journalist facing heightened risks report from the newsroom based on information being provided from others in the field.
2. Get local immigration counsel — now.
Journalists at risk need an experienced immigration lawyer in place before they’re detained, experts said.
Newsrooms should consider keeping local immigration counsel on retainer. “Getting a roster of vetted attorneys together is the first important step,” explained Marium Uddin, legal director of the Muslim Legal Fund of America and a former immigration judge.
News outlets should also consider having non-American journalists they work with sign a retainer agreement with an immigration attorney in advance, paid for by the newsroom, so that representation of the journalist could be immediate if they were detained, Uddin said.
To build their rosters of immigration attorneys, newsroom lawyers should seek referrals from those in their networks who may already have strong reputations and experience with the local immigration courts. They can also seek referrals by contacting organizations like the American Immigration Lawyers Association, the Immigration Advocates Network, and local legal aid offices.
Unfortunately, asylum cases can be expensive to litigate. In Texas, where Uddin is based, they can cost $10,000 to $20,000. While some immigration attorneys may offer free or low-cost services, newsrooms should budget for the cost of legal defense of non-American journalists detained by immigration authorities. Protecting journalists “is the cost of doing business,” said Cancino.
3. Act immediately to locate the detained journalist.
If a journalist is detained, one of the first steps will be to locate them, a process that can be made difficult by an opaque detention system and strategic shuffling of people around detention facilities.
Newsrooms should first determine if a detained journalist is in local custody, said Samantha Hamilton of the Atlanta Community Press Collective and Asian Americans Advancing Justice-Atlanta, since people who are arrested are often taken first to the county jail before being transferred to ICE.
If they have been transferred to ICE, Hamilton recommended searching for them with the online ICE detainee locator, using the person’s alien registration number and country of birth. If you don’t have that information, you can also search using their last name and country of origin. Hamilton recommended using all variations of the name, especially if the person has multiple names or uses a nickname.
Once a newsroom locates the journalist, it will want to figure out how to contact them. Each facility can have different communication rules, explained Uddin, which can often be found on the facility’s official website or ICE’s general detention center directory. Legal visits may require special steps, like completing a legal notice of representation.
4. Consider all the legal options.
In addition to challenging the journalist’s detention and deportation in immigration court, a legal petition known as habeas corpus may present another way to challenge the detention in court if a journalist is detained in retaliation for their reporting, said ACLU attorney Kim. A habeas petition asks a federal judge for an order that a person in custody be brought before the court to determine if their detention is valid.
A successful habeas petition can free someone from immigration detention. However, it cannot resolve their immigration status or stop deportation proceedings altogether. Those legal issues must be addressed separately in immigration court.
Habeas is especially important in cases where immigration detention is being used to punish people for their speech or journalism. The ACLU has brought habeas petitions in Guevara’s case and also to challenge the detention of students by immigration officials based on their political speech.
One of the biggest challenges in bringing a habeas petition is timing. Kim warned that strategic transfers of detainees between ICE facilities without warning can make legal action harder, because petitions must usually be filed in the jurisdiction where the detainee is being held. That’s why it’s so important to have legal counsel lined up and to file a habeas petition as soon as possible, ideally before any transfer occurs.
The bigger picture
A recent court ruling in California reminded the public that “a camera and a notepad are not threats to the public,” said Uddin. Unfortunately, however, government retaliation against non-American journalists remains a real threat.
So it’s not enough for newsrooms and journalists to prepare. People outside the media industry need to see how detentions of non-American journalists and other attacks on the press impact us all and speak up against them, explained Benavidez. “Because if it is one of those other people today,” she said, “it could be one of us tomorrow.”
EGITTO. Scarcerato Alaa Abdel Fattah, simbolo della rivoluzione del 2011
@Notizie dall'Italia e dal mondo
La liberazione segna la fine di un’odissea giudiziaria e umana durata quasi sei anni, contrassegnata da condizioni detentive durissime
L'articolohttps://pagineesteri.it/2025/09/23/medioriente/egitto-scarcerato-alaa-abdel-fattah-simbolo-della-rivoluzione-del-2011/
Quanto è fragile, quasi pericoloso, continuare a fare perno solo sul lavoro?
Cosa fare se si hanno problemi a lavoro.Lucia Antista (Marie Claire)
freezonemagazine.com/articoli/…
Quando ho messo nel lettore il CD di Simone Galassi, ho pensato di aver messo un disco sbagliato. Mi spiego. Non che non sappia chi sia Galassi avendolo visto on stage nella band di Ellen River, ma non sapevo cosa avrei potuto attendermi da un album a suo nome. Non che questo costituisca una sorpresa, perché proprio […]
L'articolo Simone Galassi – Simone Galassi proviene da FREE ZONE MAGAZINE.