This Homemade Mass Spectrometer Works

October 12, 2021 by 9 Comments

Hats off to [Paul Brooking] as he shows off his homemade mass spectrometer in two recent videos you can see below. The first video demonstrates that the device works. The second video shows details about how it was made.

It’s not a good starter project, requiring quite a bit of sophisticated gear including two-stage vacuum pumps, Peltier cold plates, and ion sources, but if you aren’t familiar with mass spectrometers the basic idea is simple enough. You take a sample and bombard it with electrons. This creates a stream of ions of the component parts of the sample. Ions of heavy elements, obviously, weigh more than ions of lighter elements. A magnetic field deflects the ions, and the lighter ones are deflected more than the heavier ones. By detecting ions at a certain spot in the deflected beam, you can determine the relative amount of ions at a certain mass.

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3D Printed Adapter Puts Slides In Their Best Light

October 12, 2021 by 10 Comments

If you’ve got old family photos on slides there’s an excellent chance you’ve considered digitizing them at one point or another, but perhaps didn’t know the best way of going about it. In that case, this 3D printed adapter designed by [Rostislav Persion] that lets you photograph slides with a standard DSLR may be exactly what you were waiting for.

The idea is simple enough, you place the slide inside the adapter, get your focus right, and snap a picture. But of course, you’ve also got to provide some illumination. In this case, the camera is mounted on a tripod and pointed at an appropriate light source. Once you’ve experimented a bit and got the image backlit the way you want it, you can lock everything in place and easily power through a stack of vintage family memories in no time.

For such a straightforward concept, we really appreciate the little details in the execution. For example, rather than just sliding a 3D printed cylinder over the DSLR’s lens, [Rostislav] came up with a foam-padded “shim” that’s strong enough to hold the adapter on without marring anything. The two-part slide spacer that features a bit of springiness to hold everything tight is also a very nice touch.

An approach like this should work nicely for the amount of slides most families are likely to have, but if you’re in a position where you need to digitize thousands of images, some automation would certainly help things along.

A haptic device that lets visually-impaired people experience the flow and details of dance.

The Beauty Of Dance, Seen Through The Power Of Touch

October 12, 2021 by 3 Comments

It’s nothing short of amazing what trained dancers can do with their bodies, and a real shame that visually-impaired people can’t enjoy the experience of, say, ballet. For this year’s Hackaday Prize, [Shi Yun] is working on a way for visually-impaired people to experience dance performances via haptic feedback on a special device.

This platform, which is called Kinetic Soul, uses Posenet computer vision to track a dancer’s movements. Posenet detects the dancer’s joints and creates a point map to determine what body parts are moving where, and at what speed. Then the system translates and transmits the movements to the 32 pins on the surface, creating a touchable picture of what’s going on. Each 3D-printed pin is controlled with a solenoid, all of which are driven by a single Arduino.

We think it’s interesting that Kinetic Soul can speak to the user in two different languages. The first is more about the overall flow of a dance, and the second delves into the deconstructed details. Both methods allow for dances to be enjoyed in real time, or via video recording. So how does one deconstruct dance? [Shi Yun] turned to Laban Movement Analysis, which breaks up human locomotion into four broad categories: the body in relation to itself, the effort expended to move, the shapes assumed, and the space used.

[Shi Yun] has been user-testing their ideas at dance workshops for the visually impaired throughout the entire process — this is how they arrived at having two haptic languages instead of one. They plan to continue getting input as they work to fortify the prototype, improve the touch experience, and refine the haptic languages. Check out the brief demonstration video after the break.

Yes indeed, dance is a majestic way of expressing all kinds of things. Think you have no use for interpretive dance? Think again — it can help you understand protein synthesis in an amusing way.

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Showdown Time For Non-Standard Chargers In Europe

October 12, 2021 by 115 Comments

It seems that few features of a consumer electronic product will generate as much rancour as a mobile phone charger socket. For those of us with Android phones, the world has slowly been moving over the last few years from micro-USB to USB-C, while iPhone users regard their Lightning connector as the ultimate in connectivity. Get a set of different phone owners together and this can become a full-on feud, as micro-USB owners complain that nobody has a handy charging cable any more, USB-C owners become smug bores, and Apple owners do what they’ve always done and pretend that Steve Jobs invented USB. Throwing a flaming torch into this incendiary mix is the European Union, which is proposing to mandate the use of USB-C on all phones sold in its 27 member nations with the aim of reducing considerably the quantity of e-waste generated.

Minor annoyances over having to carry an extra micro-USB cable for an oddball device aside, we can’t find any reason not to applaud this move, because USB-C is a connector born of several decades of USB evolution and brings with it not only the reversible plug but also the enhanced power delivery standards that enable fast charging no matter whose USB-PD charger you are using. Mandating USB-C will put an end to needlessly overpriced proprietary cables, and bring eventual unity to a fractured world. Continue reading “Showdown Time For Non-Standard Chargers In Europe” →

Ultrasonic spirit writing

Ultrasonic Array Powers This Halloween Spirit Writer

October 12, 2021 by 16 Comments

The spooky season is upon us, and with it the race to come up with the geekiest way to scare the kids. Motion-activated jump-scare setups are always a crowd-pleaser, but kind of a cheap thrill in our opinion. So if you’re looking for something different for your Halloween scare-floor, you might consider “spirit writing” with ultrasound.

The idea that [Dan Beaven] has here is a variation on the ultrasonic levitation projects we’ve seen so many of over the last couple of years. While watching bits of styrofoam suspended in midair by the standing waves generated by carefully phased arrays of ultrasonic transducers is cool, [Dan] looks set to take the concept to the next level. Very much still a prototype, the setup has a 256-transducer matrix suspended above a dark surface. Baking powder is sprinkled over the writing surface to stand in for dust, which is easily disturbed by the sound waves reflecting off the hard surface. The array can be controlled to make it look like an unseen hand is tracing out a design in the dust, and the effect is pretty convincing. We’d have chosen “REDRUM” rather than a pentagram, but different strokes.

[Dan] obviously has a long way to go before this is ready for the big night, but the proof-of-concept is sound. While we wait for the finished product, we’ll just file this away as a technique that might have other applications. SMD components are pretty small and light, after all — perhaps an ultrasonic pick-and-place? In which case, sonic tweezers might be just the thing.

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Fukushima Daiichi at night

A Tritium Story: How Afraid Should You Be Of Hydrogen’s Big Brother?

October 12, 2021 by 30 Comments

Despite being present in everything that contains water, tritium is not an isotope that many people were that familiar with outside of select (geeky) channels, such as DEF CON with a tritium-containing badge, the always excellent NurdRage’s assembly of a tritium-based atomic battery, or the creation of a tritium-phosphor-based glow-in-the-dark tesseract cube.

Tritium is a hydrogen isotope that shares a lot of characteristics with its two siblings: 1H (protium) and 2H (deuterium), with the main distinction being that tritium (3H) is not a stable isotope, with a half-life of ~12.32 years that sees it decay into 3He. Most naturally occurring tritium on Earth originates from interactions between fast neutrons (>4.0 MeV) from cosmic radiation and atmospheric nitrogen.

Recently tritium has become a politically hot topic on account of the announced release of treated water at the Japanese Fukushima Daiichi nuclear plant. This has raised for many the question of just how much tritium is ‘too much’ and what we’re likely to notice from this treated — but still tritium-containing water — being released into the ocean.

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Ford Maverick Welcomes DIY Spirit

October 12, 2021 by 43 Comments

We’ve featured a lot of car hacks on these pages, most would void the warranty and none of it with explicit factory support. Against that background, Ford’s upcoming Maverick is unique: a major manufacturer has invited owners to unleash their do-it-yourself spirit. It is one of several aspects that led [Jason Torchinsky] of Jalopnik to proclaim The 2022 Ford Maverick Is An Honest, Cheap, Multitool Of A Vehicle And I’m All For It.

There are two primary parts to Ford’s DIY invitation. Inside the cabin are several locations for a dovetail mount called “Ford Integrated Tether System” (FITS). Naturally Ford will be selling their own FITS accessories, but they also expect people to create and 3D-print designs addressing needs unmet by factory kits. CAD files for FITS dimensions are promised, but any maker experienced with a caliper should have little trouble.

Another part of Ford’s DIY invitation is in the cargo area, whose sides were stamped with slots for lumber beams supporting projects like a ~$45 bike rack. There are also threaded bolt holes already in the bed, no drilling or tapping into sheet metal necessary. Behind a few small plastic doors are wires to supply 12 V DC power without the risk of splicing into factory harnesses.

There will always be wild car hacks like turning a sedan into a pickup truck. But it’s great to lower the barrier of entry for milder hacks with these small and very welcome features. QR codes on a sticker takes us to Ford’s collection of video instructions to get things started. Naturally if this idea takes off other people will post many more on their own YouTube channels. We like where Ford wants to go with this, and we would love to see such DIY-friendliness spread across the auto industry. A few Ford videos explaining design intent in this area after the break.

[Title image: Ford Motor Company]

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