Making A Neo Nuvistor Project In 2026

September 11, 2026 by No comments

For a little while vacuum tubes and semiconductors were fighting a heated battle for dominance, with bipolar junction transistors and 1959’s RCA Nuvistor both allowing you to build a compact circuit with relatively low power usage and no high voltages. Although we now know that semiconductor technology won out overwhelmingly, that doesn’t mean that you cannot build a brand new Nuvistor board in 2026, as [Eric Schlaepfer] AKA [TubeTimeUS] recently did.

Nuvistors saw their most use in small-signal radio frequency applications, like VHF and UHF, with excellent low-noise characteristics that saw them used until the early 1970s in television sets, radios and oscilloscopes, as well as in space probes like the 1960s US Ranger Moon missions, so by that metric they had a good run.

Nothing so exciting is built in this video, sadly, but alongside a breakdown on how nuvistors work, we do see a discrete 555-style timer built using a gaggle of tetrode nuvistors, giving a pretty good idea of what using them in a project is like. Being a vacuum tube at its core, nuvistors still have the heater element, which is what gives vacuum tubes their reputation for being slow to start working and large current draw.

Despite their drawbacks, nuvistors still have a range of benefits compared to modern-day transistors, including being practically immune to electrostatic discharge (ESD) and electromagnetic interference (EMI) all the way up an EMP that will destroy most semiconductor electronics.

That said, the somewhat limited 8-nuvistor implementation of the 555 had to get a few extra pins for the heater supply, which burns up about 7.5 Watt just to allow the circuit to function. Terming it the ‘hollow-state 555 timer’, it works effectively just like any semiconductor 555, just with that extra power cost and of course no significant prospect of making it smaller, barring a semiconductor evolution as with the pixels-sized CRTs in the SED and FED type displays.

We covered the nuvistor before, including a great reference on this device, and its history that was much longer than people often assume today, as well as the vacuum tubes we use every day in for example our microwaves.

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Hand-Coded ASM Powers Homebrew SNES Game

September 11, 2026 by 2 Comments

Nintendo has made many game consoles in its long history — one that famously overlaps that of the Ottoman Empire — but only one of them was ever Super. It’s that console, the Super Nintendo Entertainment System, that [Inkbox] has decided to delve deeply into as he crafts a game in assembly using all the hardware tricks he can.

Hardware tricks he’ll need, given he’s limited to the two 64 kB RAM banks and 3.58 MHz Ricoh 6502-based CPU. Even the 4 MB limit he sets for a historically-accurate homemade cartridge seems positively claustrophobic by modern standards. The game he’s after making is a top-down adventure game a la Zelda, and [Inkbox] gets right into the weeds explaining how the SNES works as he shows his work in this nearly hour long video. If you’re looking for a deep dive into the architecture, along with how it is meant to be used, you could certainly find worse sources. Everything from the different graphics modes to what registers handle sound are covered in this and the previous video in the series.

We can’t help but call out his dedication to open source — the SNES Sound Engine he has put up on GitHub looks like it could be a real asset to anyone else doing this kind of homebrew. The game itself is on itch.io and is pay-what-you-want.

[Inkbox] doesn’t just limit himself to the SNES’s 6502-esqe assembly — he’s done impressive work in x86 ASM, too. Continue reading “Hand-Coded ASM Powers Homebrew SNES Game” →

Hackaday Podcast Episode 386: Doomscroll Tamagotchis, Clavichords, And Vibrotrucks

September 11, 2026 by No comments

In this specially-numbered podcast episode that lines up quite nicely with our Retrocomputing Challenge, Elliot Williams and Kristina Panos met over surprisingly low latency and loud beverages to bring you the best of the previous week’s hacks.

But first, the news. German company Isar Aerospace can now claim that they’ve launched the first spacecraft into orbit from Europe. Be sure to check out the in-link, where we reported on the building of the spaceport.

In Hackaday news, the aforementioned Retrocomputing Contest had 64 entries at last check, which is just perfect for Episode 386. Will yours be the 65th?

Supercon Ten tickets are selling out, and per Elliot, the talks have been chosen, pending approval by each submitter.  Keep an eye on the blog for the official announcement!

After reviewing the news, Elliot reached into the ol’ Mailbag and found two missives, including another from [Vik Olliver] regarding the printing of LEGO. The other is from [Mendel Munkis], who has been enjoying Wikipedia offline since 2018, thanks to a 32-bit ARM9 processor. Then, it was on to the hacks.

Check out the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

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This Machine Makes 35mm (Almost) Film

September 11, 2026 by 2 Comments

The revival in film photography has brought a range of specialist films to tempt the experimenter, as well as increased the popularity of loading your own cartridges. But perforating the film from blank stock has always been beyond the reach of home gamers. Now [Jon Schiereck] has done it, but not quite with film. He’s made a perforator for photographic paper, producing a strip which can be shot in a camera. It’s film, but it’s not exactly film.

The machine takes the form of a 3D printed mechanism which feeds a strip of photographic paper through a pair of punches to make the sprocket holes. In this case those holes are circular, being made by a pair of drill bits ground for the purpose, and they’re moved up and down by a crank driven by a set of gears from a hand crank or even a cordless drill. A rubber roller pulls the film forward.

It seems to be a well-thought-out machine, and you can try it yourself for free via a slightly unusual distribution medium, his Ko-Fi page. In case you’re worried about finding a slitter to make those 35mm paper strips, it seems he’s also working on a 3D printable one of those. So you can shoot on paper, and develop it just as you would a print.

If you’re further into extending what you can film through the use of a 3D printer, how about 8 mm movie film?

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This Week In Security: It’s Patch Tuesday Again, TVs Spying, Supply Chain Worms Return, Prolonged Hack Impacts, Stolen IDs

September 11, 2026 by 11 Comments

Several times this summer, Microsoft’s Patch Tuesday, the monthly roundup of major security patches for Microsoft products, has included record-breaking numbers of security fixes. The August 2026 patch set actually seemed to catch up. Was this a sign of the bug apocalypse lessening? Ha, nope!

Brian Krebs at Krebs On Security once again brings his excellent roundup of Patch Tuesday events, with this months patch set absolutely crushing previous numbers with nearly 1,000 security fixes.

Two of the fixes are for zero-day vulnerabilities under active exploitation in the wild, both allowing privilege escalation on Windows. Privilege escalation bugs turn general vulnerabilities in applications and games into full administrator access to gain persistence and deploy ransomware, and generally make any vulnerability significantly worse.

Krebs also calls out a CVSS 9.8 (so close to a perfect 10!) vulnerability that allows remote code execution in the Windows shell with no user interaction and no authentication, a remotely exploitable DNS bug present since Windows Server 2012 and Windows 10 which will likely see exploitation in the wild soon, and over a hundred other bugs are ranked “Critical”.

How the sheer volume of vulnerabilities in this patch will fit with recent Microsoft recommendations that companies should apply the patches immediately remains to be seen. (Likely: not very well, depending on what new behavior and issues the fixes cause!)

Is Your LG TV Spying on You?

Gamers Nexus continues their trend of high-quality investigation, and they have posted another tremendous multi-hour investigatory video. This time Gamers Nexus focuses on the ecosystem of LG televisions and monitors.

It shouldn’t likely surprise many here that “smart” devices are usually more to the benefit of advertisers than consumers. Similarly, it shouldn’t be a surprise that a “smart” device harvests user data to sell to advertises. What may be surprising is the degree to which LG devices appear to collect data, how much data is sent even when collection is turned off, and how overt executives at the company are, with multiple executives making statements in pitches to advertisers that LG “owns the glass”, “owns the living room”, and is designed to correlate devices, inhabitants of the environment, and viewing habits so that ads can be served to the TV and mobile devices in the same room simultaneously.

With tracking enabled, the smart TV captures telemetry of what applications are used, as well as continually capturing the video displayed and reporting fingerprints to LG servers and ad partners. The screen content is tracked not only for TV, but for the HDMI inputs, including if the TV is used as a PC monitor. If voice control is enabled, the TV also records audio and analyzes it. The TV also continually scans the local network and nearby Wi-Fi networks, reporting all the devices it finds on the local network, including host name, MAC address, and sometimes software running depending on the MDNS advertisements. Near-by Wi-Fi networks are sufficient for very precise geolocation, so LG effectively knows the location of every customer, as well.

Continue reading “This Week In Security: It’s Patch Tuesday Again, TVs Spying, Supply Chain Worms Return, Prolonged Hack Impacts, Stolen IDs” →

Purely Random TV In Your Browser

September 11, 2026 by 9 Comments

One of the things we used to appreciate about broadcast television is that… you kinda just got what you got. You didn’t have to choose beyond picking a channel, and then you settled in to imbibe whatever media the CRT was spraying at you. A vague recreation of part of this experience is now available, in the form of [Sergei’s] RND.TV.

The concept is simple enough—it’s a webpage that plays random videos from The Internet Archive. Each session draws videos from a random sequence, with no algorithm or fancy social media nonsense to push some videos over others. As you might expect, you’re in for lots of random and weird stuff, from old Army videos to middle-school basketball games. You can swipe to flick to a different “channel” if you don’t like what’s playing, or you can mark videos you like if you fancied what came up in the random feed. You can also use your phone as a remote if you want to sit back and flick channels like it’s the 90s again or something.

We’ve featured other projects in a similar vein before—like little TVs from The Simpsons that play episodes on repeat. Sometimes, it’s fun to just avoid the paralysis of choice, and a random stream of content can provide that relief. Or, alternatively, you could always hook up your TV to an antenna and watch free-to-air… it’s still out there, for those that wish to view it!

This Circuit Sculpture Is An ESP32-Powered Console

September 11, 2026 by 7 Comments

Expressif might not have intended the ESP32-S3 to become an emulation powerhouse, but that’s certainly what has happened. The little microcontroller seems perfect for recreating the Game Boys or Game Gears of years past, and there are a lot of software options to that end. Having grabbed firmware off a github repo, you still need a physical build to hold, and that’s where this one by [HVT Lab and Huy Vector] stands out.

As you can see, they’re letting everything hang out — not even in a 90s-inspired clear case, but with an open frame of soldered brass, with just a small strip of 2 mm clear acrylic to help stabilize the buttons. That appears to be held with cyanoacrylate glue, but it’s brass and solder doing the majority of the structural work here. We might be a little more confident tossing this lovely device in a bag or pocket if the whole device was boxed in with that acrylic — shorting the exposed power bus on your keys sounds like a bummer — but we can’t argue with the aesthetic vision here. It’s a lovely build on the physical end.

From the video it looks like the software is based on Retro-Go, which we’ve seen in use before. In any case, there are plenty of open source projects you could load onto the ESP32-S3 powering this circuit sculpture, though, from NES to IBM PC.

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