Pulling Music Out Of The Airwaves

RADIO WONDERLAND is a one-man band with many famous unintentional collaborators. [Joshua Fried]’s shows start off with him walking in carrying a boombox playing FM radio. He plugs it into his sound rig, tunes around a while, and collects some samples. Magic happens, he turns an ancient Buick steering wheel, and music emerges from the resampled radio cacophony.

It’s experimental music, which is secret art-scene-insider code for “you might not like it”, but we love the hacking. In addition to the above-mentioned steering wheel, he also plays a rack of shoes with drumsticks. If we had to guess, we’d say rotary encoders and piezos. All of this is just input for his computer programs which take care of the sampling, chopping, and slicing of live radio into dance music. It’s good enough that he’s opened for [They Might Be Giants].

Check out the videos (embedded below) for a taste of what a live show was like. There are definitely parts where the show is a little slow, but they make it seem cooler when a beat comes together out of found Huey Lewis. We especially like the “re-esser” routine that hones in on the hissier parts of speech to turn them into cymbals. And if you scan the crowd in the beginning, you can find a ten-years-younger [Limor Fried] and [Phil Torrone].

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Hackspace Websites And The Great Software Trap

Part of the job of a Hackaday writer involves seeking out new stories to write for your delectation and edification. Our tips line provides a fruitful fount of interesting things to write about, but we’d miss so much if we restricted ourselves to only writing up stories from that source. Each of us writers will therefore have a list of favourite places to keep an eye on and catch new stuff as it appears. News sites, blogs, videos, forums, that kind of thing. In my case I hope I’m not giving away too much to my colleagues when I say I keep an eye on the activities of as many hackspaces as I can.

So aside from picking up the occasional gem for these pages there is something else I gain that is of great personal interest as a director of my local hackspace. I see how a lot of other spaces approach the web, and can couple it to my behind-the-scenes view of doing the same thing here in our space. Along the way due to both experiences I’ve begun to despair slightly at the way our movement approaches the dissemination of information, the web, and software in general. So here follows a highly personal treatise on the subject that probably skirts the edge of outright ranting but within which I hope you’ll see parallels in your own spaces.

Before continuing it’s worth for a moment considering why a hackspace needs a public website. What is its purpose, who are its audience, and what information does it need to have?

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OneSolver Does What Wolfram Can’t

Wolfram Alpha has been “helping” students get through higher math and science classes for years. It can do almost everything from solving Laplace transforms to various differential equations. It’s a little lacking when it comes to solving circuits, though, which is where [Grant] steps in. He’s come up with a tool called OneSolver which can help anyone work out a number of electrical circuits (and a few common physics problems, too).

[Grant] has been slowly building an online database of circuit designs that has gotten up to around a hundred unique solvers. The interesting thing is that the site implements a unique algorithm where all input fields of a circuits design can also become output fields. This is unique to most other online calculators because it lets you do things that circuit simulators and commercial math packages can’t. The framework defines one system of equations, and will solve all possible combinations, and lets one quickly home in on a desired design solution.

If you’re a student or someone who constantly builds regulators or other tiny circuits (probably most of us) then give this tool a shot. [Grant] is still adding to it, so it will only get better over time. This may be the first time we’ve seen something like this here, too, but there have been other more specific pieces of software to help out with your circuit design.

Continuing The Dialog: “It’s Time Software People and Mechanical People Had a Talk”

A while back I wrote a piece titled, “It’s Time the Software People and Mechanical People Sat Down and Had a Talk“. It was mostly a reaction to what I believe to be a growing problem in the hacker community. Bad mechanical designs get passed on by what is essentially digital word of mouth. A sort of mythology grows around these bad designs, and they start to separate from science. Rather than combat this, people tend to defend them much like one would defend a favorite band or a painting. This comes out of various ignorance, which were covered in more detail in the original article.

There was an excellent discussion in the comments, which reaffirmed why I like writing for Hackaday so much. You guys seriously rock. After reading through the comments and thinking about it, some of my views have changed. Some have stayed the same.

It has nothing to do with software guys.

being-wrong-quoteI definitely made a cognitive error. I think a lot of people who get into hardware hacking from the hobby world have a beginning in software. It makes sense, they’re already reading blogs like this one. Maybe they buy an Arduino and start messing around. It’s not long before they buy a 3D printer, and then naturally want to contribute back.

Since a larger portion of amateur mechanical designers come from software, it would make sense that when I had a bad interaction with someone over a design critique, they would be end up coming at it from a software perspective. So with a sample size too small, that didn’t fully take into account my positive interactions along with the negative ones, I made a false generalization. Sorry. When I sat down to think about it, I could easily have written an article titled, “It’s time the amateur mechanical designers and the professionals had a talk.” with the same point at the end.

Though, the part about hardware costs still applies.

I started out rather aggressively by stating that software people don’t understand the cost of physical things. I would, change that to: “anyone who hasn’t designed a physical product from napkin to market doesn’t understand the cost of things.”

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[glitch] had a cheap EPROM eraser with very few features. Actually, that might be giving it too much credit: it’s barely more than a UV light that turns on when it’s plugged in and turns off when it’s plugged out unplugged. Of course it would be nice to implement some safety features, so he decided he’d hook it up to a software-controlled power outlet.

Of course, controlling a relay that’s wired to mains is old hat around here, and in fact, we’ve covered [glitch]’s optoisolated mains switch already. He’s gone a little beyond the normal mains relay project with this one, though. Rather than use a microcontroller to run the relay, [glitch] wrote a simple Ruby script on his computer to turn the EPROM eraser on for the precise amount of time that is required to erase the memory.The Ruby script drives the relay control directly over a USB to serial adapter’s RTS handshake pin.

[glitch]’s hack reminds us that if you just need a quick couple bits of slow output, a USB-serial converter might be just the ticket. You could imagine driving everything from standard lamps to your 3D printer’s bed heater (provided you use similar hardware), but it’s especially helpful for [glitch] who claims to forget to turn off the eraser when it’s done its job, which leaves a potentially dangerous UV source just lying about. It’s always a good idea to add safety features to a dangerous piece of equipment!

Museum Shows Off Retro Malware

There’s some debate on which program gets the infamous title of “First Computer Virus”. There were a few for MS-DOS machines in the 80s and even one that spread through ARPANET in the 70s. Even John von Neumann theorized that programs might one day self-replicate. To compile all of these early examples of malware, and possibly settle this question once and for all, [Mikko Hypponen] has started collecting many of the early malware programs into a Museum of Malware.

While unlucky (or careless) users today are confronted with entire hard drive encryption viruses (or worse), a lot of the early viruses were relatively harmless. Examples include Brain which spread via floppy disk, the experimental ARPANET virus, or Elk Cloner which, despite many geniuses falsely claiming that Apples are immune to viruses, infected Mac computers of the 80s. [Mikko] has collected many more from this era that can be downloaded or demonstrated in a browser.

Retrocomputing is an active community, with users keeping gear of this era up and running despite it being 30+ years old. This software, while malicious at the time, is a great look into what the personal computing world was like in its infancy. And don’t forget, if you have a beige computer from a bygone era, you can always load up our Retro Page.

Thanks to [chad] for the tip!

KiCAD BOM Management

KiCAD remains a popular tool for designing PCBs and other circuits, and with good reason: it’s versatile and it’s got pretty much everything needed to build any type of circuit board you’d want. It also comes with a pretty steep learning curve, though, and [Jeff] was especially frustrated with the bill of materials (BOM) features in KiCAD. After applying some Python and Kivy, [Jeff] now has a BOM manager that makes up for some of KiCAD’s shortcomings.

Currently, the tool handles schematic import, like-component consolidation, and a user-managed parts database that can be used to store and retrieve commonly used parts for the future. All of the changes can be saved back to the original schematic. [Jeff] hopes that his tool will save some time for anyone who makes more than one PCB a year and has to deal with the lack of BOM features native to KiCAD.

[Jeff] still has some features he’d like to add such as unit tests, a user guide, and a cleaner user interface. What other features are you anxious to see added to KiCAD?

This script is a great tool for anyone who has had similar frustrations. KiCAD is popular to modify and expand, too: there have been tools for mechanical CAD export, a parts-generator and cost-tracker, and an Eagle to KiCAD converter if you’re thinking of making the switch.