3D Printing Blueprints And Other Wall Art

Today if you want to reproduce a big schematic or a mechanical drawing, you just ask it to print or plot from the CAD model. But back in the day, you drew on big sheets at a drafting table. How do you make copies? Sure, there were a few large-format copiers, but they were expensive. A more common method was to use a heliographic copier which, often but not always, resulted in a blueprint — that is a blue page with white lines or vice versa. These days, you are more likely to see a blueprint as an artistic wall hanging, and since [Basement Creations] wanted some, he figured out how to make them with a 3D printer.

These prints aren’t really blueprints. They use the printer as a plotter and deposit white ink on a blue page. In the video below, he shows a number of ways to use a printer to create interesting wall art, even if you want it to be bigger than the print bed. Some of the wall art uses multiple 3D printed parts, and others use the printer as a plotter.

Continue reading “3D Printing Blueprints And Other Wall Art”

Building A Breath-Controlled MIDI Device

When we think of MIDI devices, we typically jump straight to drum machines, rack synths, and keyboard controllers. However, there’s nothing saying you can’t build your own MIDI controllers that use the magic of breath to do their musical duty. That’s precisely what [Xavier Dumont] did with this unique 3D printed build.

The device looks somewhat like an alien ship from an animated 1960s sci-fi movie, but it’s actually a sophisticated MIDI controller. Naturally, it’s peppered with buttons as every good controller should be, and it features a touch-control strip on the back.

However, the real magic is in the breath control. When the user blows into the sensor, the device sends out MIDI signals of varying intensity to control the object of the player’s desire. The breath signal can be used to modulate the mod wheel, pitch bends, or octave shifts, among a variety of other options.

[Xavier] wields the instrument with prowess in the audio demos at the end of the video. We can imagine this futuristic thing being played by a background alien in a celebration scene in a far-flung Marvel movie. Or maybe Star Wars? In any case, a triumph.

Continue reading “Building A Breath-Controlled MIDI Device”

Faster Glacier Melting Mechanism Could Cause Huge Sea Level Rises

When it comes to the issue of climate change, naysayers often contend that we have an incomplete understanding of the Earth’s systems. While humanity is yet to uncover all the secrets of the world, that doesn’t mean we can’t act on what we know. In many cases, as climate scientists delve deeper, they find yet more supporting evidence of the potential turmoil to come.

In the stark landscapes of Greenland, a team of intrepid researchers from the University of California, Irvine, and NASA’s Jet Propulsion Laboratory have unearthed a hidden facet of ice-ocean interaction. Their discovery could potentially flip our understanding of sea level rise on its head.

Continue reading “Faster Glacier Melting Mechanism Could Cause Huge Sea Level Rises”

Hackaday Podcast 219: Lots Of Lasers, Heaps Of Ham Radio, And Breaching The Blood Brain Barrier

Elliot and Dan teamed up for the podcast this week, bringing you the week’s sweetest hacks. And news too, as the ESA performed a little percussive maintenance on a Jupiter-bound space probe, and we learned about how to get an Orwellian free TV that exacts quite a price. We talked about Bitcoin mining two ways, including a way to put all that waste heat to good use — just don’t expect it to make good financial sense. Why would you stuff zip ties into a hot glue gun? It might just help with plastic repair. Lugging a tube transmitter up a mountain doesn’t sound like a good idea, but with the right design, it’s a lot of fun — and maybe you’ll be better able to tap into Schumann resonances while you’re up there.

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!

Download a long series of ones and zeroes that, when appropriately interpreted, sound like two people talking about nerdy stuff!

Continue reading “Hackaday Podcast 219: Lots Of Lasers, Heaps Of Ham Radio, And Breaching The Blood Brain Barrier”

Custom Glove Guides Wearers’ Dreams

For as much advancement as humanity has made in modern medicine even in the last century alone, there’s still plenty we don’t understand about the human body. That’s particularly true of the brain, where something as common as dreams are the subject of active debate about their fundamental nature, if they serve any purpose, and where they originate. One research team is hoping to probe a little further into this mystery, and has designed a special glove to help reach a little deeper into the subconscious brain.

The glove, called Dormio, has a number of sensors and feedback mechanisms which researchers hope will help explore the connection between dreaming and creativity. Volunteers were allowed to take a nap while wearing the glove, which can detect the moment they began entering a specific stage of sleep. At that point, the device would provide an audio cue to seed an idea into the dreams, in this case specifically prompting the sleeper to think about trees. Upon awakening, all reported dreaming about trees specifically, and also demonstrated increased creativity in tests compared to control groups.

While this might not have the most obvious of implications, opening the brain up to being receptive of more creative ideas can have practical effects beyond the production of art or music. For example, the researchers are also investigating whether the glove can help individuals with post-traumatic stress disorder manage nightmares. From a technical perspective this glove isn’t much different from some other devices we’ve seen before, and replicating one to perform similar functions might be possible for most of us willing to experiment on ourselves.

This Week In Security: .zip Domains, Zip Scanning

The world may not be ready, but the .zip Top Level Domain (TLD) is here. It’s a part of the generic TLD category, which was expanded to allow applications for custom TLDs. Google has led the charge, applying for 101 such new TLDs, with .zip being one of the interesting ones. Public registration for .zip domains has been open for a couple weeks, and some interesting domains have been registered, like update.zip, installer.zip, and officeupdate.zip.

The obvious question to ask is whether this new TLD can be abused for scamming and phishing purposes. And the answer is yes, sure it can. One of the trickiest ways is to use the AT symbol @ in a URL, which denotes user info at the beginning of the URL. It usually is used to include a username and password, like http://username:password@192.168.1.1/. That is pretty obvious, but what about https://google.com@bing.com? Still looks weird. The catch that really prevents this technique being abused is that slashes are disallowed in user data, so a abusive URL like https://google.com∕gmail∕inbox@bing.com is right out.

Except, take a look at that last link. Looks like it has slashes in it, so it should take you to google, and ignore the AT symbol. But it doesn’t, it goes to Bing. You may have guessed, it’s Unicode shenanigans again. Those aren’t slashes, they’re U2215, the division slash. And that means that a .zip TLD could be really sneaky, if the apparent domain is one you trust. Continue reading “This Week In Security: .zip Domains, Zip Scanning”

Building A Giant Vacuum Tube Smart Lamp

Vacuum tubes are pretty, which is why they’re often showcased externally on exquisitely-expensive home Hi-Fi hardware. But if you just want to gaze at their beauty without making any noise, why not build this vacuum tube lamp from [Noel Törjék] instead?

[Noel] got into some creative reuse with this build, with the main body consisting of a bell jar and wooden bowls. The internal structure is then created from jar lids, wire, metal sheeting, steel rods, and galvanized wire mesh. Simple modelling techniques are used to assemble the internal parts of the “valve,” including the grid and the electrodes and so on. As for light, [Noel] employed a ZigBee LED driver that he could control over his smart home setup via a Philips Hue bridge.

The final result looks like an extra-large tube. Anyone who knows what it is will spot that it’s not a real one, but they’re also exactly the audience that will appreciate it for what it is. Everyone else will probably just think you’ve taken an interest in strange art-deco replica lighthouses. It’s not the first time we’ve seen replica valves around these parts, though, and we’re sure it won’t be the last!