ASPIR, the Autonomous Support and Positive Inspiration Robot is an goblin-sized robot, designed by [John Choi], aims to split the difference between smaller hobbyist robots and more robust but pricy full-sized humanoids only a research institute could afford. By contrast, [John] estimates it cost a relatively meager $2,500 to create such a homunculus.
The robot consists of 33 servos of various types moving the limb, controlled by an Arduino Mega with a servo control shield seated on it. The chassis uses 5 kg of filament and took 300 hours to print, and it has a skeleton made up of aluminum hex rods. Spring-loaded RC shocks help reinforce the shoulders. There are some nice touches, like 3D-printed hands with living hinge fingers, each digit actuated by a metal-gear micro servo. It stores its power bricks in its shins. For sensors it includes a chest-mounted webcam and a laser distance sensor.
The main design feature is the Android smartphone serving as its brains, and also — at least cosmetically — its eyes. Those eyes… might be just a teensy bit too Chucky for our taste. (Nice work, [John]!)
[Mike] was inspired by a video of some kids building mini-sumo bots who were doing anything and everything to personalize them. He vowed to make his own affordable, easy-to-build bots with education firmly in mind. His other major requirement? They had to be as easily customizable as that one potato-based toy that eventually came with a bucket of parts. As of this writing, there are 34 interchangeable accessories.
[Mike]’s first idea was to build the bots out of custom 3D-printed building blocks. He soon found it was too much work to print consistent blocks and switched to a modular cube-like design instead. SimpleSumo bots can do much more than just fight each other. [Mike] has written programs to make them flee from objects, follow lines, find objects and push them out of the ring, and beep with increasing frequency when an object is detected.
If there’s one thing that Hollywood knows about hackers, it’s that they absolutely love data visualizations. Sometimes it’s projected on a big wall (Hackers, WarGames), other times it’s gibberish until the plot says otherwise (Sneakers, The Matrix). But no matter what, it has to look cool. No hacker worth his or her salt can possibly work unless they’ve got an evolving Venn diagram or spectral waterfall running somewhere in the background.
Inspired by Hollywood portrayals, specifically one featured in Avengers: Age of Ultron, [Zack Akil] decided it was time to secure his place in the pantheon of hacker wall visualizations. But not content to just show meaningless nonsense on his wall, he set out to create something that was at least showing actual data.
[Zack] created a neural network to work through multi-label classification data in Python using the scikit-learn machine learning suite. The code takes the values from the neutral network training algorithm and converts them to RGB colors by way of an Arduino. Each “node” in the neutral network is 3D printed in translucent filament, and fitted with an RGB LED module. These modules are then connected to each other via side-glow fiber optic tubes, so that the colors within the tubes are mixed depending on the colors of the nodes they are attached to. This allows for a very organic “growing” effect, as colors move through the network node-by-node.
In the end this particular visualization doesn’t really mean anything; the data it’s working on only exists for the purposes of the visualization itself. But [Zack] succeeded in creating a practical visualization of machine learning, and if you’re the kind of person who needs to keep tabs on learning algorithms, some variation of this design may be just what you’re looking for.
Open source software has unquestionably gone from fringe idealism to mainstream, even if the average person doesn’t really know it. From their web browser to their smartphone operating system, more people are running open source software today than at any other time in the history of computing, and the numbers are only getting bigger. While we can debate how well some companies are handling their responsibilities to the open source community, overall this is probably a lot closer to an open source utopia that many of us ever believed we’d get.
For argument’s sake, let’s say the software is settled. What’s next? Well, if we’ve got all the open source software we could ever ask for, naturally we now need to run it on open source hardware. Just like our software, we want to see how it works, we want to modify it, and to fix it ourselves if we want. These goals are precisely what [Lukas Hartmann] had in mind when he started work on Reform, the latest entry in the world of fully open source laptops.
A plate of fresh keycaps
Like the Novena that came before it, the Reform leverages the four-core ARM Cortex-A9 NXP i.MX6 SoC to deliver tablet-level performance, though [Lukas] mentions the design may migrated to the upgraded six-core version of the chip in the future which should give it a little more punch. The SoC is paired with the Vivante GC2000 GPU which can be used under Linux without any binary blobs. Most hardware is connected to the system via the USB 2.0 bus, though networking is provided by a ThinkPenguin mini PCI-e wireless adapter, and on-board SATA handles the 128 GB SSD.
While the internals are relatively run-of-the-mill these days, the work that [Lukas] has done on the case and input devices is definitely very impressive. He partnered with industrial designer [Ana Dantas] to get the look and feel of the system down, and built almost everything out of 3D printed parts. Even the keyboard caps and the trackball were manufactured in house on a Formlabs Form 2. Rather than using an off-the-shelf USB HID solution, [Lukas] is using Teensy LC boards to interface the custom input hardware with the OS.
[Lukas] is still working on how and when the Reform will be made available to the public. After some refinements, the team hopes to make both kits and individual parts available, and of course put all the files up so you can build your own if you’ve got the equipment. A mockup Amazon listing for the Reform has been posted to get the public’s feedback on the look and features of the machine, and [Lukas] asks that anyone with comments and suggestions send him an email.
Having a child is perhaps the greatest “hack” a human can perform. There’s no soldering iron, no Arduino (we hope), but in the end, you’ve managed to help create the most complex piece of machinery in the known galaxy. The joys of having a child are of course not lost on the geekier of our citizens, for they wonder the same things that all new parents do: how do we make sure the baby is comfortable, how many IR LEDs do we need to see her in the dark, and of course the age old question, should we do this with a web app or go native?
If you’re the kind of person who was frustrated to see that “What to Expect When You’re Expecting” didn’t even bother to mention streaming video codecs, then you’ll love FruitNanny, the wonderfully over-engineered baby monitor created by [Dmitry Ivanov]. The product of nearly two years of development, FruitNanny started as little more than a Raspberry Pi 1n a plastic lunch box. But as [Dmitry] details in his extensive write-up, the latest iteration could easily go head-to-head with products on the commercial market.
[Dmitry] gives a full bill of materials on his page, but all the usual suspects are here. A Raspberry Pi 3 paired with the official NoIR camera make up the heart of the system, and the extremely popular DHT22 handles the environmental monitoring. A very nice 3D printed case, a lens intended for the iPhone, and a dozen IR LEDs round out the build.
The software side is where the project really kicks into high gear. Reading through the setup instructions [Dmitry] has provided is basically a crash course in platform-agnostic video streaming. Even if a little bundle of joy isn’t on your development roadmap, there’s probably a tip or two you can pick up for your next project that requires remote monitoring.
Some may be surprised to hear that CB radio is alive and well in the 21st century. From disaster response to operating in areas without reliable communication infrastructure, there are plenty of reasons people are still reaching for their radio and not their smartphone. Unfortunately, modern automotive interior design doesn’t have such an enlightened view. It’s hard enough to get decent cup holders in some cars, let alone a spot to hang your microphone.
When presented with this problem in his Subaru Forester, [Alex Loizou] did what any modern hacker would, he 3D printed a mount that snaps into the stock dash. No drilling was required to attach his radio mount, it simply replaces a decorative trim piece that wasn’t doing anything anyway. Obviously this particular mount would only really work on the same year and make of vehicle as [Alex] has, but this is a good demonstration of how 3D printing can be used to adapt to existing hardware.
As is often the case when trying to print something to match perfectly with an existing object, there was a fair amount of trial and error required. It took a few attempts before [Alex] got the proper shape, and things weren’t made any easier by the fact he was doing his designing in TinkerCAD. While we appreciate the fact that TinkerCAD provides a web-based CAD tool that is easy enough for anyone to use, using a parametric design tool like OpenSCAD is generally preferred when you need to make slight adjustments to your model.
Software limitations aside, [Alex] managed to come up with a mount that not only holds his CB microphone, but also his handheld transmitter. All while looking about as close to stock hardware as something like this could. We especially like that he switched to a darker filament color for his final version to blend it into the dashes color scheme a bit better.
Even the staunchest 3D printing supporter would have to concede that in general, the greatest strength of 3D printing is not in the production of final parts, but in prototyping. Sure you can make functional prints, as the pages of this site will attest; but few would argue that you wouldn’t be better off getting your design cut out of metal or injection molded if you planned on putting the part into service over the long term. Especially if the part was to be subjected to rough service in an industrial setting.
While that’s valid advice, it certainly isn’t the definitive word on the issue. Just because a part is printed in plastic on a desktop 3D printer doesn’t necessarily mean it can’t be put into real service, at least for as long as it takes to get proper replacement parts. A recent success story from [bloomautomatic] serves as a perfect example, when one of the gears in his MIG welder split, he decided to try and print up a replacement in PLA while he waited for the nylon gear to get shipped out to him. Fast forward seven months and approximately 80,000 welds later, and [bloomautomatic] reports it’s finally time to install those replacement gears he ordered.
In the pictures [bloomautomatic] posted you can see the printed gear finally wore down to the point the teeth were essentially gone where they meshed with their metal counterparts. To those wondering why the gear was plastic to begin with, [bloomautomatic] explains that it’s intended to be a sacrificial gear that will give way instead of destroying the entire gearbox in the event of a jam. According to the original post he made when he installed the replacement gear, the part was printed in Folgertech PLA on a Monoprice Select Mini. There’s no mention of infill percentage, but with such a small part most slicers would likely have made it essentially solid to begin with.
The robot consists of 33 servos of various types moving the limb, controlled by an Arduino Mega with a servo control shield seated on it. The chassis uses 5 kg of filament and took 300 hours to print, and it has a skeleton made up of aluminum hex rods. Spring-loaded RC shocks help reinforce the shoulders. There are some nice touches, like 3D-printed hands with living hinge fingers, each digit actuated by a metal-gear micro servo. It stores its power bricks in its shins. For sensors it includes a chest-mounted webcam and a laser distance sensor.
