You can buy motorized camera sliders off-the-shelf, but they’re pretty costly. Alternatively, you can make one yourself, and it’s not even that hard if you’re kitted out with a 3D printer. [Creative 3D Printing] did just that with a nifty design that adds rotation into the mix. Check it out in the video below.

The basic slider is built out of 3D-printed components and some good old aluminum extrusion. A small 12-volt motor trucks the camera cart back and forth using a leadscrew. It’s torquey enough and slow enough that there isn’t much need for more advanced control—the motor just does the job. There’s also a limit switch set up to trigger a neat auto-reverse function.

The neat part, though, is the rotational mechanism. A smooth steel rod is attached to the slider’s housing, which can be set up in a straight line or aligned diagonally if desired. In the latter case, it rotates the mounting on the camera cart via a crank, panning the camera as it moves along the slider’s trajectory.

It’s a mechanically sophisticated design and quite unlike most of the camera sliders we feature around these parts.

Camera sliders are a popular project for makers—especially those who document their projects on video. They’re fun and accessible to build, and they can really create some beautiful shots. [Lechnology] set about to follow in this fine tradition and built a rather capable example of his own. Check it out in the video below.

The slider relies on V-slot rails, perhaps most familiar for their heavy use in modern 3D printers. The rails are paired with a 3D-printed camera carriage, which runs on smooth rubber rollers. A chunky stepper motor provides drive via a toothed belt. Trinamic motor controllers were chosen for their step interpolation feature, making the motion much smoother.

The slider doesn’t just move linearly, either. It can rotate the camera, too, since it has an additional motor in the carriage itself. In a nice retro touch, the wires for this motor are run with an old coiled telephone cable. It’s perfect for the job since it easily extends and retracts with the slider’s motion. Controlling everything is an Arduino, with speed and rotational modes set via a tiny screen and a rotary encoder control.

It’s a very complete build, and it performs well too. The video it produces is deliciously smooth. We’ve featured some other great camera sliders over the years, too. If you want to dig into Trinamic drivers, we can get you started.

Early Monday morning, while many of us will be putting the finishing touches — or just beginning, ahem — on our Christmas preparations, solar scientists will hold their collective breath as they wait for word from the Parker Solar Probe’s record-setting passage through the sun’s atmosphere. The probe, which has been in a highly elliptical solar orbit since its 2018 launch, has been getting occasional gravitational nudges by close encounters with Venus. This has moved the perihelion ever closer to the sun’s surface, and on Monday morning it will make its closest approach yet, a mere 6.1 million kilometers from the roiling photosphere. That will put it inside the corona, the sun’s extremely energetic atmosphere, which we normally only see during total eclipses. Traveling at almost 700,000 kilometers per hour, it won’t be there very long, and it’ll be doing everything it needs to do autonomously since the high-energy plasma of the corona and the eight-light-minute distance makes remote control impossible. It’ll be a few days before communications are re-established and the data downloaded, which will make a nice present for the solar science community to unwrap.

While Parker has been in a similar position on previous orbits and even managed a fortuitous transit of a coronal mass ejection, this pass will be closer and faster than any previous approach. It’s the speed that really grabs our attention, though, as Parker will be traveling at a small but significant fraction of the speed of light for a bit. That makes us wonder if there was any need for mission planners to allow for relativistic effects. We’d imagine so; satellite navigation systems need to take relativity into account to work, and they don’t move anywhere near as fast as Parker. Time will be running slower for Parker at those speeds, and it sure seems like that could muck things up, especially regarding autonomous operation.

Ever since the seminal work of Cameron, Hamilton, Schwarzenegger, et al, it has been taken as canon that the end of humanity will come about when the moral equivalent of SkyNet becomes self-aware and launches all the missiles at once to blot us out with a few minutes of thermonuclear fire. But it looks like AI might be trying to raise an army of grumpy teenagers if this lawsuit over violence-inciting chatbots is any indication. The federal product liability lawsuit targets Character.AI, an outfit that creates LLM-powered chatbots for kids, for allegedly telling kids to do some pretty sketchy stuff. You can read the details in the story, but suffice it to say that one of the chatbots was none too pleased with someone’s parents for imposing screen time rules and hinted rather strongly about how the child should deal with them. The chat logs of that interaction and others that are part of the suit are pretty dark, but probably no darker than the advice that most teenagers would get online from their carbon-based friends. That’s the thing about chatbots; when an LLM is trained with online interactions, you pretty much know what’s going to come out.

In today’s “Who could have seen that coming?” segment, we have a story about how drivers are hacked by digital license plates and are keen to avoid tolls and tickets. The exploit for one specific brand of plate, Reviver, and while it does require physical access to the plates, it doesn’t take much more than the standard reverse engineering tools and skills to pull off. Once the plates are jailbroken — an ironic term given that license plate manufacturing has historically been a prison industry — the displayed numbers can be changed at will with a smartphone app. The worst part about this is that the vulnerability is baked right into the silicon, so there’s nothing to be patched; the plates would have to be recalled, and different hardware would need to be reissued. We’ve been skeptical about the need for these plates from the beginning and questioned why anyone would pay extra for them (last item). But maybe the ability to dump your traffic cam violations into someone else’s lap is worth the extra $20 a month.

And finally, this local news story from Great Falls, Montana, is a timely reminder of how machine tools can mess up your life if you let them. Machinist Butch Olson was alone at work in his machine shop back on December 6 when the sleeve of his jacket got caught in a lathe. The powerful machine pulled his arm in and threatened to turn him to a bloody pulp, but somehow, he managed to brace himself against the bed. He fought the lathe for 20 whole minutes before the motor finally gave out, which let him disentangle himself and get some help. He ended up with a broken back, four fractured ribs, and an arm that looks “like hamburger” according to his sister. That’s a high price to pay, but at least Butch gets to brag that he fought a lathe and won.

It looks like we won’t have Cruise to kick around in this space anymore with the news that General Motors is pulling the plug on its woe-beset robotaxi project. Cruise, which GM acquired in 2016, fielded autonomous vehicles in various test markets, but the fleet racked up enough high-profile mishaps (first item) for California regulators to shut down test programs in the state last year. The inevitable layoffs ensued, and GM is now killing off its efforts to build robotaxis to concentrate on incorporating the Cruise technology into its “Super Cruise” suite of driver-assistance features for its full line of cars and trucks. We feel like this might be a tacit admission that surmounting the problems of fully autonomous driving is just too hard a nut to crack profitably with current technology, since Super Cruise uses eye-tracking cameras to make sure the driver is paying attention to the road ahead when automation features are engaged. Basically, GM is admitting there still needs to be meat in the seat, at least for now.

Speaking of accidents, the results of the first aircraft accident investigation on another world were released this week, and there were a few surprises. Ingenuity, the little helicopter that hitched a ride to Mars in the belly of the Perseverance rover in 2021, surpassed all expectations by completing 71 flights successfully and becoming an integral part of the search for ancient life on Mars. But flight 72 proved to be a bridge too far and ended with a hard landing that terminally damaged its rotor system. At the time it was speculated that the relatively bland terrain it was flying over at the time of the accident was the root cause. This was confirmed by analysis of the flight logs, but the degree to which the flight computer’s down-looking navigation camera was confused by the featureless dunes is new information. As for why the rotor blades broke, it doesn’t appear that it was because they impacted the surface. Rather, as Scott Manley points out, the blades appear to have broken at their weakest point due to extreme flexing induced by the high vertical speed while touching down on a slope, which caused one set of legs to hit the surface before the others.

Also roughly in the realm of space-based failures comes the story of a hapless senior citizen in New York who has been issued thousands of dollars in traffic tickets because of her love for Star Trek. Years ago, Long Island resident Beda Koorey got a New York vanity license plate for her car emblazoned with “NCC-1701,” the registration number of the USS Enterprise. She turned in those plates years ago when she gave up driving, but in the meantime, novelty NCC-1701 plates began popping up on Amazon and other sites. They were clearly not intended to be used on cars, but that didn’t stop some people from putting them on over their real plates in an attempt to defeat traffic cameras. It worked, at least from their point of view, since it left poor Beda with a collection of tickets for speeding and red light violations from as far away as Chicago. She even got a ticket for a violation committed by a motorcycle with a phony plate, which you think would not map to the registration for an automobile, but there you go. We always knew it was hard to be a Trekkie, especially back in the ’70s, but at least it never cost us much money. It did cost us a lot of dates, though.

We featured plenty of stories of start-up tech companies with the next must-have IoT device that fold up shop after a few years and abandon their users by effectively bricking their widgets. Heck, we’ve even suffered that fate ourselves; curse you, Logitech, for killing the SqueezeBox. However, one company recently took IoT bricking to a new low by ending support for a line of AI-powered companion bots for kids. The company was called Embodied, and they hawked $800 AI bots for kids called Moxie, with a cute face and a huggable form factor that kids couldn’t help falling in love with. Embodied couldn’t make a go of it financially and since Moxie uses a cloud-based LLM to interact with kids, the bots are now bricked. This leaves parents who invested in these devices with the quandary of having to explain to young kids that their robot pal is dead. Some of the TikToks of parents breaking the news are heartbreaking, and we can’t help but think that this is a perfect opportunity for someone in our community to reverse-engineer these things and bring them back to life.

And finally, the burning of the Yule Log is an ancient tradition, one that reminds us of the time our grandfather brought an entire telephone pole that had washed up on the beach home and burned it for days on end, feeding it slowly into the fireplace in the living room through the open front door. Good times. Not everyone is blessed with a fireplace in their abode, though, which has given rise to the popularity of video Yule Logs that you can just play on your TV. And now NASA is in on the action with an eight-hour 4K video of the SLS main engines and boosters. Framed by a lovely stone fireplace and replete with crackling wood sound effects over the subdued roar of the four RS-25 engines and twin solid-fuel boosters, it’ll make a nice addition to your holiday festivities. Although given that NASA just announced that the next Artemis missions are delayed until at least 2026, we’re not sure that it’s a great idea to show a rocket that never lifts off. You’ll also want to be careful that the neighbors don’t see the action.