Hackaday Links: September 17, 2017


Mergers and acquisitions? Not this time. Lattice Semiconductor would have been bought by Canyon Bridge — a private equity firm backed by the Chinese government — for $1.3B. This deal was shut down by the US government because of national security concerns.

[Jan] is the Internet’s expert in doing synths on single chips, and now he has something pretty cool. It’s a breadboard synth with MIDI and CV input. Basically, what we’re looking at is [Jan]’s CVS-01 chip for a DCO, DCF, and DCA), a KL5 chip for an LFO, and an envelope chip. Tie everything together with a two-octave captouch keyboard, and you have a complete synthesizer on a breadboard.

As an aside relating to the above, does anyone know what the cool kids are using for a CV/Gate keyboard controller these days? Modular synths are making a comeback, but it looks like everyone is running a MIDI keyboard into a MIDI-CV converter. It seems like there should be a –simple, cheap– controller with quarter-inch jacks labeled CV and Gate. Any suggestions?

World leaders are tweeting. The Canadian PM is awesome and likes Dark Castle.

Way back in July, Square, the ‘POS terminal on an iPad’ company posted some data on Twitter. Apparently, fidget spinner sales peaked during the last week of May, and were declining through the first few weeks of summer. Is this proof the fidget spinner fad was dead by August? I have an alternate hypothesis: fidget spinner sales are tied to middle schoolers, and sales started dropping at the beginning of summer vacation. We need more data, so if some of you could retweet this, that would be awesome.

Remember [Peter Sripol], the guy building an ultralight in his basement? This is going to be a five- or six-part video build log, and part three came out this week. This video features the installation of the control surfaces, the application of turnbuckles, and hardware that is far too expensive for what it actually is.

Fidget Spinners Put The ‘S’ In STEAM Education

Centrifuges are vital to the study of medicine, chemistry, and biology. They’re vital tools to separate the wheat from the chaff figuratively, and DNA from saliva literally. Now, they’re fidget spinners. [Matlek] designed a fidget spinner that also functions as a simple lab centrifuge.

The centrifuge was designed in Fusion 360, and was apparently as easy as drawing a few circles and hitting copy and paste. Interestingly, this fidget spinner was designed to be completely 3D printable, including the bearings. The bearing is a standard 608 though, so if you want to get some real performance out of this centrispinner, off-the-shelf bearings are always an option. The design of this fidget spinner holds 2 mL and 1.5 mL vials, but if your lab has 500 μL tubes on hand, there are handy 3D printable adapters.

Still think using a toy to do Real Science™ is dumb? Contain your rage, because a few months ago a few folks at Stanford devised a way to build a centrifuge out of paper. This paperfuge can — at least theoretically — save lives where real commercial centrifuges or even electricity aren’t available. Fidget spinners save humanity once again.

Hackaday Links: July 9, 2017

Doom is now running on the ESP32. This is some work from [Sprite_tm], and the last we heard about Doom on the ESP32 is that there was a silicon bug or something. Now we’re knee deep in the dead on a tiny WiFi and Bluetooth-enabled microcontroller.

Loading animations have a long and storied history. What originally began as an hourglass quickly turned into a hand counting to five and progress bars. There were clocks, the Great Beach Ball of Death, and now loading animations are everywhere. However, the loading animation has still not been perfected — until now, that is. This is a fidget spinner loading animation. It’s beautiful.

Just a quick reminder that a Minecraft scholarship exists. Yeah, I know what you’re thinking, but there is a scholarship from the Klingon Language Institute for studying any language, and last year’s winner built a redstone computer from scratch,

[8bit generation] recently released a documentary, about the rise of Atari. Easy to Learn, Hard to Master is about the rise of Atari under [Nolan Bushnell]. Now [8bit generation] is working on a new documentary: Firing Steve Jobs. The [Steve Jobs] story is fascinating, and no matter what you think of him, he probably knew what he was doing.

Want to build and sell some hardware? Over on Tindie, we’re taking a look at some of the most successful designers of custom crafted hardware. This time it’s [Albertas Mickėnas] of Catnip Electronics who has sold five thousand soil moisture sensors.

You can just go out and buy a CNC machine, but that doesn’t quite underscore the difficulty in getting a CNC machine running. Our ‘ol pal [Jeremy] recently picked up a Romaxx CNC machine and put together a video of its commissioning. There’s a lot of work here, from building a shelf/stand for a rather beefy machine to cutting into the bed for t-tracks, and figuring out how dust collection is going to happen.

Before there was KiCad and Eagle and a ton of web-based PCB design tools, there was Autotrax. Want to know what PCB design and GUIs look like in DOS? I did a walkthrough for designing a small PCB in the DOS version of Autotrax late last year. There are thousands of designs locked up in discontinued EDA suites, and [Erich] has a way to revive them. He’s developed an Autotrax/Easytrax layout import/export plugin for pcb-nd. Now legacy Protel designs can be imported into software released in this century. This is really cool, and you can check out some screenshots here.

Teaching STEAM With Fidget Spinners

A huge focus of the maker revolution has been a focus on STEAM education, or rather an education in science, technology, engineering, art, and mathematics. We’ve seen innumerable kits and tools designed to introduce children to STEAM apps, ranging from electronic Lego blocks to robotics kits built around interlocking plastic bricks. These are just a passing fad, but finally, we have what looks like a winner: a STEAM education fidget spinner.

Fidget spinners have spun into our hearts like a shuriken over the last few months, and [MakerStorage]’s latest project taps into the popularity of fidget spinners to put an educational — wait for it — spin on the usual STEAM education toolkit. This is exactly what the maker revolution needs.

On board this educational fidget spinner are a few RGB LEDs and an Arduino-compatible microcontroller development board. A coin cell battery powers everything, and in an interesting advancement of fidget spinner science, [MakerStorage] seems to be using a flanged bearing with a PCB. We’re seeing the march of technology right before our eyes, people. Right now there are two versions of the educational fidget spinner, one with an Arduino Pro Micro soldered to the board, and another with an ATMega-derived custom circuit on the board along with a PCB USB connector.

Haven’t gotten enough fidget spinner news? OH BOY does Hackaday have you covered. Here’s the Internet of Fidget Spinners, a fidget spinner with an embedded WiFi microcontroller and a bunch of blinky LEDs. Those LEDs form a Persistence of Vision display. It’s amazing, astonishing, and it’s in fidget spinner format. Bored with your oscilloscope? Turn it into a fidget spinner tachometer. There’s literally nothing that can’t be applied to the world of fidget spinners.

Hackaday Prize Entry: Internet of Fidget Spinners

We just closed out the Internet of Useful Things round of the Hackaday Prize, which means we’re neck deep in judging projects to move onto the final round this fall. Last week, everyone on Hackaday.io was busy getting their four project logs and illustrations ready for the last call in this round of the Hackaday Prize. These projects are the best of what the Internet of Things has to offer because this is the Internet of Useful things.

We’re not sure how [Matthias]’ project will rank. It’s an Internet of Things fidget spinner. Yeah, we know, but there are some interesting engineering challenges in building an Internet-connected fidget spinner.

This is a PoV fidget spinner, which means the leading edges of this tricorn spinner are bedazzled with APA102 LEDs. Persistence-of-vision toys are as old as Hackaday, and the entire idea of a fidget spinner is to spin, so this at least makes sense.

These PoV LEDs are driven by an ESP8285, or an ESP8266 with onboard Flash. This is probably the smallest wireless microcontroller you can find, an important consideration for such a small build. Power comes from a tiny LiPo, and additional peripherals include an accelerometer to measure wobble and an optical switch to measure the rotation speed.

These electronics are fairly standard, and wouldn’t look out of place in any other project in The Hackaday Prize. The trick here is mechanical. [Matthias] needs to mount a skateboard bearing to a PCB, and no one has any idea how he’s going to do that. A fidget spinner should be well-balanced, and again [Matthias] is running into a problem. Has anyone here ever done mass and density calculations on PCBs and lithium cells? Is it possible to 3D print conformal counterweights? Has science gone too far?

Will the Internet of Things PoV Fidget Spinner make it to the finals round of The Hackaday Prize? We’ll need to wait a week or so to find out. One thing is for certain, though: you’re going to see this on AliBaba before September.

Big Slew Bearings Can Be 3D Printed

Consider the humble ball bearing. Ubiquitous, useful, and presently annoying teachers the world over in the form of fidget spinners. One thing ball bearings aren’t is easily 3D printed. It’s hard to print a good sphere, but that doesn’t mean you can’t print your own slew bearings for fun and profit.

As [Christoph Laimer] explains, slew bearings consist of a series of cylindrical rollers alternately arranged at 90° angles around an inner and outer race, and are therefore more approachable to 3D printing. Slew bearings often find application in large, slowly rotating applications like crane platforms or the bearings between a wind turbine nacelle and tower. In the video below, [Christoph] walks us through his parametric design in Fusion 360; for those of us not well-versed in the app, it looks a little like magic. Thankfully he has provided both the CAD files and a selection of STLs for different size bearings.

[Christoph] is no stranger to complex 3D-printable designs, like his recent brushless DC motor or an older clock build. The clock is cool, but the bearings and motors really get us — we’ll need such designs to get to self-replicating machines.

Continue reading “Big Slew Bearings Can Be 3D Printed”

Hackaday Links: May 14, 2017

Maker Faire Bay Area is next weekend, and you know what that means: we’re having a meetup on Saturday night. If you’re in the area, it’s highly recommended you attend. It’s a blinky bring-a-hack with booze. You can’t beat it. I heard the OPShark is showing up. All hail the OPShark. You’re gonna want to RSVP if you’re going k thx.

It only took twelve years, but [ladyada] finally got herself on the cover of Make.

Nvidia has the Jetson, an extremely powerful single board computer + GPU meant for machine learning, imagifying, and robotics applications. If you want to do fancy ML stuff with low power devices, I’d highly recommend you check the Jetson out. Of course, the Jetson is only the brains of any Machine Learning robot; you also need some muscle. To that end, Nvidia released the Isaac robotic simulator. It’s a simulator for standard bits of hardware like quadcopters, hovercrafts (?), robotic arms, and yes, selfie drones. What does this mean? Standardized hardware means someone is going to produce 3rd party hardware, and that’s awesome.

This is just an observation, but fidget spinners are just now hitting the mainstream. We didn’t know what they were for a year ago, and we don’t know now.

A Hebocon is a shitty robot battle. DorkbotPDX just had their first Hebocon and the results were… just about as shitty as you would expect. Since this is a shitty robot battle, a MakerBot made an appearance. This robot, SpitterBot, was designed to blow extruded filament all over its opponent. Did the MakerBot win? Yes, SpitterBot won the ‘Poorest Quality’ award.

Supplyframe, Hackaday’s parent company, hosts monthly-ish electronic get-togethers in the San Fransisco office. The focus of these meetups is to find someone cool who built something awesome and get them to talk about it. The March meetup featured [Pete Bevelacqua] who built a Vector Network Analyzer from scratch. The video is worth a watch.