ISS Mimic Brings Space Station Down To Earth

October 6, 2023 by Tom Nardi 20 Comments

Built at a cost of more than $150 billion over the last twenty-five years, the International Space Station is arguably one of humanity’s greatest engineering triumphs. Unfortunately, unlike Earthly construction feats such as the Hoover Dam, Burj Khalifa, or the Millau Viaduct, you can’t visit it in person to really appreciate its scale and complexity. Well, not unless you’ve got the $50 million or so to spare to buy a seat on a Dragon capsule.

Which is why the team behind the ISS Mimic project are trying to make the ISS a bit more relatable. The open source project consists of a 3D printable 1:100 model of the Station, which is linked to the telemetry coming down from the real thing. A dozen motors in the model rotate the solar arrays and radiators to match the positions of their full-scale counterparts, while LEDs light up to indicate the status of various onboard systems.

To learn more about the ISS Mimic, team members Bryan Murphy, Sam Treadgold, and Tristan Moody stopped by this week’s Hack Chat to bring us up to speed on the past, present, and future of this fascinating project.

Continue reading “ISS Mimic Brings Space Station Down To Earth” →

Audacity Runs Surprisingly Well In Your Browser

October 5, 2023 by Tom Nardi 13 Comments

Audacity is an extremely popular open source audio editor, with hundreds of millions of downloads on the books. But due to some controversy over changes the Muse Group wanted to implement when they took ownership of the project back in 2021, the userbase has fractured somewhat. Some users simply stick with an older version of the program, while others have switched over to one of the forks that have popped up in the last couple of years.

The Wavacity project by [Adam Hilss] is a bit of both. It looks and feels just like an older version of Audacity (specifically, 3.0.0). But the trick here is that he’s managed to get it working with WebAssembly (WASM) so you can run it in your browser. Impressively, it even works on mobile devices. Though the Audacity UI, which already carries the sort of baggage you’d expect from a program that’s more than 20 years old, is hardly suited to a touch screen. Continue reading “Audacity Runs Surprisingly Well In Your Browser” →

Hackaday Prize 2023: The Wildcard Finalists Are Here

October 4, 2023 by Tom Nardi 5 Comments

We’re in the endgame now — there’s just about a month to go before the final results are announced for the 2023 Hackaday Prize, which means all of our finalists are in a mad rush to put the finishing touches on their respective projects. Today, ten more hackers are about to feel the heat as we announce our final group of finalists from the Save the World Wildcard round.

As finalists, each of these projects has been awarded $500 to help further their development. But perhaps more importantly, they are now officially in the running for one of the final six awards, which includes the Grand Prize of $50,000 and a residency at the Supplyframe DesignLab.

Continue reading “Hackaday Prize 2023: The Wildcard Finalists Are Here” →

Autonomous Wheelchair Lets Jetson Do The Driving

October 4, 2023 by Tom Nardi 9 Comments

Compared to their manual counterparts, electric wheelchairs are far less demanding to operate, as the user doesn’t need to have upper body strength normally required to turn the wheels. But even a motorized wheelchair needs some kind of input from the user to control it, which still may pose a considerable challenge depending on the individual’s specific abilities.

Hoping to improve on the situation, [Kabilan KB] has developed a self-driving electric wheelchair that can navigate around obstacles by feeding the output of an Intel RealSense Depth Camera and LiDAR module into a Jetson Nano Developer Kit running OpenCV. To control the actual motors, the Jetson is connected to an Arduino which in turn is wired into a common L298N motor driver board.

As [Kabilan] explains on the NVIDIA Blog, he specifically chose off-the-shelf components and the most affordable electric wheelchair he could find to bring the total cost of the project as low as possible. An undergraduate from the Karunya Institute of Technology and Sciences in Coimbatore, India, he notes that this sort of assistive technology is usually only available to more affluent patients. With his cost-saving measures, he hopes to address that imbalance.

While automatic obstacle avoidance would already be a big help for many users, [Kabilan] imagines improved software taking things a step further. For example, a user could simply press a button to indicate which room of the house they want to move to, and the chair could drive itself there automatically. With increasingly powerful single-board computers and the state of open source self-driving technology steadily improving, it’s not hard to imagine a future where this kind of technology is commonplace.

Chip Shortage Engineering: Misusing DIP Packages

October 3, 2023 by Tom Nardi 57 Comments

After years of seeing people showing off and trading their badge Simple Add-Ons (SAOs) at Supercon, this year I finally decided to make one myself. Now for a first attempt, it would have been enough to come up with some cool PCB art and stick a few LEDs on it. But naturally I started with a concept that was far more ambitious than necessary, and before long, had convinced myself that the only way to do the thing justice was to have an onboard microcontroller.

My first thought was to go with the venerable ATtiny85, and since I already had a considerable stock of the classic eight-pin DIP MCUs on hand, that’s what I started prototyping with. After I had something working on the breadboard, the plan was to switch over to the SOIC-8 version of the chip which would be far more appropriate for something as small as an SAO.

Unfortunately, that’s where things got tricky. I quickly found that none of the major players actually had the SMD version of the chip in stock. Both DigiKey and Mouser said they didn’t expect to get more in until early 2024, and while Arrow briefly showed around 3,000 on hand, they were all gone by the time I checked back. But that was only half the problem — even if they had them, $1.50 a piece seems a hell of a lot of money for an 8-bit MCU with 8K of flash in 2023.

The whole thing was made all the more frustrating by the pile of DIP8 ATtiny85s sitting on the bench, mocking me. Under normal circumstances, using them in an SAO wouldn’t really be a problem, but eight hand-soldered leads popping through the front artwork would screw up the look I had in mind.

While brooding over the situation my eyes happened to fall on one of the chips I had been fiddling with, it’s legs badly bent from repeated trips through the programmer. Suddenly it occurred to me that maybe there was a way to use the parts I already had…

Continue reading “Chip Shortage Engineering: Misusing DIP Packages” →

Hackaday Podcast 238: Vibrating Bowl Feeders, Open Sourcery, Learning To Love Layer Lines

September 29, 2023 by Tom Nardi 4 Comments

Elliot Williams and Tom Nardi start this week’s episode off with some deep space news, as NASA’s OSIRIS-REx returns home with a sample it snapped up from asteroid Bennu back in 2020. From there, discussion moves on to magical part sorting, open source (eventually…) plastic recycling, and the preposterously complex method newer Apple laptops use to determine if their lid is closed. They’ll also talk about the changing perceptions of 3D printed parts, a new battery tech that probably won’t change the world, and a clock that can make it seem like your nights are getting longer and longer. Stick around until the end to hear about the glory days of children’s architecture books, and the origins of the humble microwave oven.

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!

Go ahead and download it!

Continue reading “Hackaday Podcast 238: Vibrating Bowl Feeders, Open Sourcery, Learning To Love Layer Lines” →

Drop-In Upgrade PCB Brings USB-C To DualShock 4

September 26, 2023 by Tom Nardi 4 Comments

Despite a somewhat shaky start, it seems like everyone is finally embracing USB-C. Most gadgets have made the switch these days, and even Apple has (with some external persuasion) gotten on board. That’s great for new hardware, but it can lead to a frustrating experience when you reach for an older device and find a infuriatingly non-oval connector on the bottom.

If one of those devices happens to be Sony’s DualShock 4 controller, [DoganM95] has the fix for you. Sony wisely put the controller’s original micro USB connector on a separate PCB so it could be cheaply replaced without having to toss the main PCB — that same modularity also means it was relatively easy to develop a USB-C upgrade board.

That said, there was a bit of a catch. The USB board on the DualShock 4 also carries a LED module that illuminates the “Light Bar” on the rear of the controller. In this design, [DoganM95] has replaced the original component with a pair of side-firing LEDs. Combined with the extra pins in the flexible printed circuit (FPC) connector necessary to control them, and the pair of 0603 resistors required for USB-C to actually provide power, putting this board together might take a bit more fine-pitch soldering than you’d expect.

Over the last couple of years, we’ve seen a wide array of devices receive DIY USB-C upgrades. In fact, this isn’t even the first time we’ve seen it done on the DualShock 4. But there’s something about hacking a modern port onto a legacy piece of hardware that we just can’t seem to get enough of.