One Ring Light To Fool Them All Into Thinking You’re Well-Rested

March 8, 2021 by 3 Comments

We know you’re beautiful, but maybe that cheap web camera from 2007 doesn’t always project your best image. Although web cameras are starting to come back down from the pandemic price gouging days, you could just build yourself a ring light and go from there, because better light may be all you need to look great.

Of course, this isn’t going to be cheaper than just buying a ring light, but if you already have a Circuit Playground and 3D printer lying around, you’re about halfway to owning one that’s much cooler than anything you can buy. The only other major hardware is the RGBW LED ring, the slide pots that adjust the light color, and the clicky little button that exits out of Zoom calls.

The business part is made to mount right over the camera, so the only part that has a footprint is the control box. No need to make space for a tripod or another boom. If you’re worried about staring into a bunch of lights, there’s a diffusing ring among the print files. We think this setup looks great, especially since [Southern Fried Science] built a light guide into the enclosure so those LED on the Circuit Playground don’t go to waste.

Do you just wish you had a more satisfying way to leave Zoom calls? If there’s a stud near your desk, it doesn’t get much more satisfying than a pull chain. If the only stud around is you, then use a giant mushroom button.

Via adafruit

A Soyuz Space Clock Replica

March 8, 2021 by 16 Comments

If you like the retro look of old Soviet space hardware, then this replica of the model 774H Soyuz digital clock by [David Whitty] might be the perfect accessory for your desk. Forgoing the original stack of ten jam-packed circuit boards, [David] used an Arduino, a GPS receiver, and a handful of other common parts to create a convincing reproduction.

Out with the old, in with the new

He also made some functional changes to make it better suited as an ordinary clock for us earthbound folk. If you want to take on this project yourself, be prepared for some real metalwork. No 3D printing filament was harmed in building this project. It’s based on a pair of heavily modified Hammond cast aluminum enclosures, with over 1 kg of lead ballast added to give it the appropriate heft of the original. The GPS patch antenna is cleverly hidden on the rear interface connector, but a discrete hole for a USB connector gives away the secret that this isn’t an original. The software (free for non-commercial use) and build notes are available on his GitHub repository.

We covered [Ken Shirriff]’s fascinating dive into the guts of a real Soyuz digital clock back in January. If old space hardware is your thing, you should definitely check out this teardown by [CuriousMarc] of the 653B, the 1960s-era electro-mechanical predecessor to the 774H. Thanks to [CuriousMarc] for bringing this project to our attention.

Continue reading “A Soyuz Space Clock Replica” →

Framed PONG Is Picture Perfect

March 8, 2021 by 9 Comments

How cool would it have been if arcade cabinets had acrylic panels all along that let you gaze upon the field of TTL chips within? When [Jürgen Müller] scored the innards of an original 1972 PONG machine, that’s exactly what the plan was: build a suitable cabinet that re-imagines PONG as a sleek and stunning work of art.

Instead of trying to cram a CRT in that nice mahogany cabinet, [Jürgen] opted to use an 8″ TFT screen. But get this: [Jürgen] built a Spartan 6 FPGA-based upscaler to adds the scan lines, blur, and afterglow that make it look like the classic PONG experience.

[Jürgen] also built an interface board that amplifies the sound, splits the video out into sync and brightness for the upscaler, and provides 5 V to the PONG circuit board. [Jürgen] decided to circumvent the board’s native voltage regulator in the name of keeping things cool.

[Jürgen] says the project’s web page is in a preliminary stage right now with more information to come. We sure hope that includes a video of it in action. For now, you can check out the files for the interface PCB, the FPGA board, and a list of the fonts.

Should you ever get tired of classic PONG, try playing it in one dimension.

Thanks for the tip, [Anonymous].

What Can A $30 USB Spectrum Analyser Do For Me?

March 8, 2021 by 36 Comments

As mildly exotic silicon has become cheaper and the ingenuity of hardware hackers has been unleashed upon it, it’s inevitable that some once-unattainably expensive instruments will appear as cheap modules from China. The LTDZ spectrum analyser on the bench today covers 35 MHz to 4.4 GHz, and has a USB interface and tracking source. It has been available from all the usual outlets for a while now either as a bare PCB or in a metal box about the size of a pack of cards.

We’ve already taken a look at the $50 VNA, and this time it’s the turn of the $30 spectrum analyser, in the form of a little device that I succumbed to while browsing Banggood.

I ordered one, along with an attenuator and RF bridge for SWR measurements, and after the usual wait for postage my anonymous grey package arrived and it was time to give it a look and consider its usefulness. It’s a design derived from one published in Germany’s Funkamateur (“amateur radio”) magazine early in the last decade, and unscrewing the end plate to slide out the board from its extruded enclosure we can see what makes it tick. Continue reading “What Can A $30 USB Spectrum Analyser Do For Me?” →

Decapping Components Hack Chat With John McMaster

March 8, 2021 by 2 Comments

Join us on Wednesday, March 10 at noon Pacific for the Decapping Components Hack Chat with John McMaster!

We treat them like black boxes, which they oftentimes are, but what lies beneath the inscrutable packages of electronic components is another world that begs exploration. But the sensitive and fragile silicon guts of these devices can be hard to get to, requiring destructive methods that, in the hands of a novice, more often than not lead to the demise of the good stuff inside.

To help us sort through the process of getting inside components, John McMaster will stop by the Hack Chat. You’ll probably recognize John’s work from Twitter and YouTube, or perhaps from his SiliconPr0n.org website, home to beauty shots of some of the chips he has decapped. John is also big in the reverse engineering community, organizing the Mountain View Reverse Engineering meetup, a group that meets regularly to discuss the secret world of components. Join us as we talk to John about some of the methods and materials used to get a look inside this world.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, March 10 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.
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A Scientist Made An Artificial Black Hole In The Lab, And You Won’t Believe What Happened Next

March 8, 2021 by 53 Comments

OK, that was a little click-baity, but then again, so was the announcement this week that a scientist had confirmed Hawking radiation with a lab-grown black hole. It sure got our attention, at least.

As it turns out, the truth is both less and more than meets the eye. The article above was eventually edited to better reflect the truth that, alas, we have not yet found a way to create objects so massive that even light cannot escape them. Instead, physicist [Jeff Steinhauer] and colleagues at the Technion-Israel Institute of Technology have developed an acoustic model of black holes, which is what was used to observe the equivalent of Hawking radiation for the first time. Hawking radiation is the theoretical exception to the rule that nothing makes it out of a black hole and would imply that black holes evaporate over time. The predicted radiation would be orders of magnitude weaker than the background radiation, though, making it all but impossible to detect.

That’s where [Steinhauer]’s sonic black holes come in. In these experiments, phonons, packets of mechanical vibrations that stand in for photons, are trapped in a fast-moving stream of fluid. The point in the stream where its speed straddles the local speed of sound is the equivalent to a real black hole’s event horizon; phonons inside that boundary can never escape. Except, of course, for the sonic equivalent of Hawking radiation, which the researchers found after 97,000 attempts.

When we first stumbled upon this story, we assumed a lab-grown black hole, even an acoustic analog, would take a CERN’s-worth of equipment to create. It turns out to be far simpler than that; [Steinhauer], in fact, built his black hole machine singlehandedly from relatively simple equipment. The experiments do require temperatures near absolute zero and a couple of powerful lasers, so it’s not exactly easy stuff; still, we can’t help but wonder if sonic black holes are within the reach of the DIY community. Paging [Ben Krasnow] and [Sam Zeloof], among others.

[Featured image credit: Nitzan Zohar, Office of the Spokesperson, Technion]

Sea Level: How Do We Measure Global Ocean Levels And Do Rising Oceans Change That Benchmark?

March 8, 2021 by 34 Comments

Every summer you go down the shore, but lately you’ve begun to notice that the beach seems narrower each time you visit. Is that the sea level rising, or is the sand just being swept away? Speaking of sea levels, you keep hearing that they rise higher every year — but how exactly is that measured? After all, you can’t exactly use a ruler. As it turns out, there are a number of clever systems in place that can accurately measure the global sea level down to less than an inch and a half.

Not only are waves always rippling across the ocean’s surface, but tides periodically roll in and out, making any single instantaneous measurement of sea level hopelessly inaccurate. Even if you plan to take hundreds or thousands of measurements over the course of weeks or months, taking the individual measurements is still difficult. Pick a nice, stable rock in the surf, mark a line on it, and return every hour for two weeks to hold a tape measure up to it. At best you’ll get within six inches on each reading, no matter what you’ll get wet, and at worst the rock will move and you’ll get a damp notebook full of useless numbers. So let’s take a look at how the pros do it.

Continue reading “Sea Level: How Do We Measure Global Ocean Levels And Do Rising Oceans Change That Benchmark?” →