2026-04-03 10:00:23
Over the years there have been many designs for pan-and-tilt camera mounts suitable for single board computer cameras. Often they mount small servos for the movement, but those in turn present problems when the device finds its way outdoors. [GOAT Industries] is here with a novel solution to this problem, instead of trying to cover up the servos on the mount itself, the whole thing is remotely controlled by linear actuators through Bowden cables.
Testing was performed using Mole-Grips instead of actuators, and revealed a few design quirks. There are hefty springs to provide tension, and since they work against 3D printed assemblies those in turn have to be reinforced. The layout of the Bowden cable run is also important, as it has a bearing on the amount of springinesss in the system. But it provides a versatile pan-and-tilt mount for a Pi camera mounted in an IP-rated box, which is the object of the exercise.
For anyone wishing to build one the files can be found in a GitHub repository, and there’s a video below showing the device in action. Meanwhile it’s by no means the first pan-and-tilt head we’ve seen here at Hackaday, however many others are by necessity much more substantial affairs.
2026-04-03 07:00:56
Although easily dismissed by some as another cruel April Fools joke, Raspberry Pi’s announcement of a new 3 GB model of the Raspberry Pi 4 along with (more) price increases for other models was no joke. Courtesy of the ongoing RAMpocalypse, supplies of LPDDR4 and LPDDR5 are massively affected, leading to this new RPi 4 model with two 1.5 GB LPDDR4 chips, as these are apparently cheaper to source.
Affected in this latest price increase across RP’s product range are RPi 4 and 5 models with 4 or more GB of RAM, with price bumps ranging from $25 on the low end to $150 for the Raspberry Pi 500+. If you wanted a Raspberry Pi 5 with 16 GB of RAM, you’re now paying $300 for the privilege.
Obviously, this news has got people like [Jeff Geerling] rather down in the dumps, essentially stating that using SBCs like the RPi is now beyond the means of many hobbyists. While you can still use SBCs that use e.g. LPDDR2 RAM, such as the older RPi Zero, 2 and 3 models, [Jeff] himself is now moving more towards wrangling with snakes on MCUs, as these boards are so far not significantly affected in terms of price.
With current projections in the RAM market being that this year will still see more price increases, it remains hard to tell exactly how ‘temporary’ this situation will be. That said, using readily available, powerful and cheap MCUs like the ESP32 variants for projects isn’t a bad idea if you really don’t need to be running more than perhaps FreeRTOS.
2026-04-03 04:00:11
If you’ve never heard of the threadless ball screw, which was invented over sixty years ago, [Angus] of Maker’s Muse has a video demonstrating the whole thing, covering its history and showcasing both its strengths and weaknesses. If you like seeing mechanical assemblies in action, give it a watch.
The device — consisting of little more than a smooth rod and three angled ball bearings — is a way to turn rotational motion into linear motion. Not a single belt, thread, or complex mechanical assembly in sight. While a simple nut on a threaded rod can turn rotation into linear motion, those come with their own issues. The threadless ball screw was one effort at finding a better way.
Threadless ball screws never really took off, although they were given some consideration for use in 3D printers back in the RepRap days. Today one can purchase quality CNC components without leaving one’s web browser, but back in the early 2000s things like lead screws and ball screws were rather more specialized, less accessible, and more expensive than they are today. RepRap folks had to make their own solutions. But while the threadless ball screw is a very DIY-friendly design, it was ultimately lacking in performance.
The main problem is they’re just not precise enough for anything like CNC work. [Angus] does some back-and-forth tests with a 3D printed unit that shows serious drift after only a few minutes. Now, he knows perfectly well that his 3D-printed test unit is far from ideal, but the rapidity at which it drifted was still a surprise. Making a carriage with two threadless ball screws — one at each end — performed a lot better, but was ultimately still flawed.
It’s not all bad. There’s zero backlash. They are mechanically simple, remarkably smooth, and utterly quiet. Also, [Angus] discovered that the maximum force this setup can be made to apply is surprisingly significant, and is directly related to the tension on the bearings. That means one can trivially adjust how easily the carriage slips (or doesn’t) just by tightening or loosening the screw holding each bearing.
Sure, they’re not precise. But maybe you don’t need precision. Maybe you just need to move something back and forth in a strong & silent sort of way that can still slip gracefully (and quietly) if something goes awry, like bottoming out an axis. 3D printing makes it pretty easy to whip one up, so maybe there’s still a place for the threadless ball screw.
2026-04-03 02:30:58
Although Windows 95 stole the show, Windows 3.0 was arguably the first version of Windows that more or less nailed the basic Windows UI concept, with the major 3.1 update being quite recognizable to a modern-day audience. Even better is that you can still install Win3.1 on a modern x86-compatible PC and get some massive improvements along the way, as [Omores] demonstrates in a recent video.
The only real gotcha here is that the AMD AM5 system with Asus Prime X670-P mainboard is one of those boards whose UEFI BIOS still has the ‘classic BIOS’ Compatibility Support Module (CSM) option. With that enabled, Win 3.1 installs without further fuss via a USB floppy drive from a stack of ‘backup’ floppies that someone made in the early 90s. [Omores] also tried it with CSMWrap, but with this USB to PS/2 emulation didn’t work.
Windows 3.1 supports ‘enhanced mode’ by default, which adds virtual memory and multi-tasking if you have an 80386 CPU or better. To fix crashing on boot and having to use ‘standard mode’ instead, the ahcifix.386 fix for the responsible SATA issue by [PluMGMK] should help, or a separate SATA expansion card.
For the video driver the vbesvga.drv by [PluMGMK] was used, to support all VESA BIOS Extensions modes. This driver has improved massively since we last covered it and works great with an RTX 5060 Ti GPU. There’s now even DCI support to enable direct GPU VRAM access for e.g. video playback, with audio also working great with only a few driver-related gotchas.
2026-04-03 01:00:05
It’s easy to think of online console gaming as an invention of the 2000s. Microsoft made waves when Xbox Live dropped in 2002, with Nintendo and Sony scrambling to catch up with their own offerings that were neither as sleek or well-integrated.
However, if you were around a decade earlier, you might have experienced online console gaming much closer to the dawn of the Internet era. As far back as 1990, you could jump online with your Sega Mega Drive. But what did an online console feel like in the dial-up era?
The Sega Mega Drive was launched in Japan in October 1988. The company was in a tough battle with Nintendo for gaming dominance, and the new 16-bit console was intended to best its rival’s offerings across the board. With a forward-looking attitude, Sega quickly developed an online offering for the console, which went under a few different names. It was known as Mega Net, or alternatively, the Sega Net Work System.
The system hit the market on November 3 1990, exclusively for the Japanese market, with Sega talking up a future launch in the US under the “Tele-Genesis” name. The initial Mega Net kit cost ¥12,800, which included the Mega Modem accessory—a simple 1,200 bps dial-up modem which plugged into the “EXT” DE-9 port on the back of the Model 1 Mega Drive. Access to Mega Net service came at a cost of ¥800 a month. Users got a copy of Nikkan Sports Pro Baseball VAN, which provided live updates and statistics on baseball matches when connected to the service.
The Mega Net pack also included the “Game Library” cartridge. This allowed users to dial up to Mega Net and play a variety of downloadable games. These titles had to be incredibly compact, usually under 128 KB. This was both because of the glacially slow 1,200 bps modem, and because the Mega Drive had no real storage capability to speak of. 42 games were released on the system, and titles would take about 5 to 8 minutes to download. The vast majority were single player experiences. However, two games – Tel-Tel Stadium and Tel-Tel Mahjong – featured online play via Mega Net. Perhaps unsurprisingly, both games were turn-based—a practical necessity given the limited speeds and latency achievable with the slow Mega Modem. A handful of games from Mega Net would later see cartridge releases of their own.
Users could also engage in multiplayer gaming with certain cartridge-based titles. However, this was not using a server-based online system. Instead, this merely consisted of point-to-point dial-up play between two consoles equipped with the Mega Modem.
Mega Net wasn’t just limited to gaming, however. Sega explored more utilitarian uses for the Mega Drive with the release of Mega Anser. This came as a package that included the Mega Modem, the Mega Anser software, and a numeric keypad controller called the Ten Key Pad. There was also an optional printer that plugged into one of the controller ports. The most notable use of the Mega Anser was for online banking. Depending on your bank, you could manage your funds with the Naisu-kun Mini, Osaka Ginkou no Home Banking Service My Line, or Sumisei Home Tanmatsu.
Unfortunately, the technology wasn’t quite there in 1990 to support a fully-vibrant online gaming service. By 1992, Sega realised there wasn’t a large market for Mega Net and Mega Anser services, and the hardware started turning up in bargain bins for drastically reduced prices. By 1993, Sega had released a remodelled Mega Drive which eliminated the EXT port required for the Mega Modem, making it clear that there was no interest in taking the service any further.
The end of Mega Net in Japan was swift, but the name would live once more. That time came in 1995, when a similar service saw a last gasp release in Brazil, of all places. Supported by local distributor Tectoy, it ran using a unique modem accessory that plugged into the cartridge slot. The range of services on offer was quite different—users could access emails, fax messages, and read an electronic magazine called Revista Eletrônica. The system was designed to be used with the Sega Mouse for a more computer-like interface experience, and prices started at R$5 a month for access to the service. The service was, in many ways, completely unrelated to the original Sega effort, but was inspired by it and wore similar branding.
Brazil’s Mega Net was more modern and had additional ways for users to interact with each other.
Sega’s early experiment with online console gaming was not a grand success. It failed to attract a huge user base or offer any ground-breaking features. However, it did give the company a base to work from when it came to getting later consoles online, like the Saturn and Dreamcast that arrived years later. Ultimately, Sega would largely be out of the console market by the time online gaming really took off in that world, but you can’t fault the former Japanese titan for trying to get in early.
2026-04-02 23:30:55
If you’re an American and you use the Internet at home, it seems probable that routers are going to be in short supply. The US government recently mandated all such devices be home grown for security reasons, which would be fine were it not that the US has next-to-no consumer-grade router manufacturing industry.
So if you’re in the US and you need a router, what can you do? [Noah Bailey] is here from Canada to point out that almost anything (within reason) in computer terms can be made to perform as a router.
The piece is really a guide to setting up a Linux router, which he does on a small form factor PC and a hacked-together assembly of old laptop, PCI-express extender, and scrap network kit. In its most basic form a router doesn’t need the latest and greatest hardware, so there exists we’re guessing almost two decades of old PCs just waiting to be pressed into service. Perhaps it won’t help the non-technical Man In The Street much, but maybe it’ll inspire a few people to save themselves a hefty bill when they need to connect.
