Single Motor, Single Piece 3D Printed Hovercraft

March 8, 2018 by Steven Dufresne 12 Comments

RC hovercrafts offer all sorts of design options which make them interesting projects to explore. There are dual-motor ones where one motor provides lift while the other does the thrust. For steering, the thrust motor can swivel or you can place a rudder behind it. And there are single-motor ones where one motor does all the work. In that case, the airflow from the motor blades has to be redirected to under the hovercraft somehow, while also being vectored out the back and steered.

[Tom Stanton] decided to make a single-motor hovercraft using only a single 3D printed piece for the main structure. His goals were to keep it as simple as possible, lightweight, and inexpensive. Some of the air from the blades is directed via ducting printed into the structure to the underside while the remainder flows backward past a steering rudder. He even managed to share a bolt between the rudder’s servo and the motor mount. Another goal was to need no support structure for the printing, though he did get some stringing which he cleaned up easily by blasting them with a heat gun.

From initial testing, he found that it didn’t steer well. He suspected the rudder wasn’t redirecting the air to enough of a sideways angle. The solution he came up with was pretty ingenious, switching to a wedge-shaped rudder. In the video below he gives a the side-by-side comparison of the two rudders which shows a huge difference in the angle at which the air should be redirected, and further testing proved that it now steered great.

Another issue he attacks in the video below was a tendency for the hovercraft to dip to one side. He solves this with some iterative changes to the skirt, but we’ll leave it to you to watch the video for the details. The ease of assembly and the figure-eight drift course he demonstrates at the end shows that he succeeded wonderfully with his design goals.

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Hacking A Pint-Sized Mercedes

March 6, 2018 by Al Williams 30 Comments

[Jonas] bought an electric Mercedes “ride on” toy for his one-year-old son. At least that’s his story. However, the vehicle has become a target for dad’s obsession with hacking and he’s already done quite a few upgrades. Even better, he did quite a bit of analysis on what’s already there. He isn’t done, but he’s promised quite a bit in the next installment which isn’t out yet.

The original car can take a driver or it can use remote control. [Jonas] has an ambitious list of ideas, some of which are still not complete:

Speed along with softer acceleration and braking
Improve the radio controller
Proper rubber tires
Proper stereo system
Individual brake disks on the front wheels
Improved horn
Proper seat belt or maybe even a new seat

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A Tabletop Star Wars Themed Lego Racer Game

March 4, 2018 by Jenny List 13 Comments

When it comes to the title of undisputed king of the toy construction kit world, the Danes have it. Lego are ubiquitous in the toybox, and parents worldwide know the joy of stepping barefoot on a stray brick. Aside from the themed sets for youngsters and collectors, we see a lot of Lego in projects that make it to these pages. Sometimes they are from hardware hackers who’ve chosen Lego because they had some to hand or because of its utility, but at other times they come from the Lego community rather than the wider one.

Take the Star Racer from [Alexis Dos Santos] as an example of the former. It’s a table top racing game made entirely from Lego, and with control courtesy of Lego Mindstorms. It’s a real rolling road game, with a track made from five continuous belts of grey Lego sections, with obstacles attached to them. The Podracer slides from side to side at the front under user control, and the object is to avoid them as they come towards you at varying speed.

It’s a beautiful piece of work, and as well as the linked Flickr photographs it can be seen in the YouTube video below the break. The sticker says it’s a highly addictive game, and we’d be inclined not to disagree.

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R.O.B. Gets A Proper RC Resurrection

March 3, 2018 by Sonya Vasquez 3 Comments

More than 30 years ago, Nintendo’s R.O.B graced toy shelves, helping usher in an age of video games that is here to stay. For the few of us lucky to own one of these relics, we’ll find that R.O.B’s internal mechanisms that drive the arms and neck movements are just begging to be modified. That’s exactly what [Kenny Storm] did, installing a few continuous-rotation servos to give R.O.B a new mobile life of its own.

The original R.O.B featured a surprisingly intricate gearbox configuration embedded inside the shoulders for both up-and-down shoulder movement and hand-pinching. (For a more detailed investigation on the internals of the original hardware, have a look at this teardown.) This hack is sparsely documented, but from what we can gather, the mobile R.O.B uses all three existing degrees of freedom that the original supported while furthermore adding mobility with continuous rotation servos.

Glancing at the dates from this forum post, this find is almost 8 years old. Age is never a dealbreaker here, though, as the sheer quaintness of this hack will surely stand the test of time. Watching R.O.B take up a presence with mobility on this desk hearkens back to our childhood mysticism of unboxing this companion with our Nintendo when we were children. Finally (shameless plug!), if you’re just as excited as the author at the chance of seeing R.O.B back on your shelf with at-home-manufacturing techniques, have a go at printing my 1:1 scale R.O.B head replica.

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Arduino BabyTV Is Big Fun At Low Resolution

February 26, 2018 by Tom Nardi 10 Comments

What kind of TV do you have? An older 720p model, or the now standard 1080p? Perhaps you’ve made the leap to the next generation, and are rocking a 4K display in the living room. All those are are fine and dandy if you just want to watch the local sportball contest, but where’s the challenge in that? With all the technology and modular components we have access to anymore, nowadays all the real hackers are making their own TVs.

Of course, when [Nikolai] built his very own LED TV, he did have to make a few concessions. For one thing, there’s no tuner on this model. Oh, and there’s the small issue of only having a 16×16 resolution. It might not be your idea of the perfect display, but it’s just perfect for his newborn son.

That’s right, [Nikolai] got his entry for the “Hacker Parent of the Year” award in early, and built an LED display for his son that he’s calling “BabyTV”.

Rather than the ~~shows~~, ~~trash~~, advertisements that they play on the kid channels, this TV only shows animated characters from retro games. We’ll concede that this project might be an elaborate Clockwork Orange style attempt at hypnotizing his son to instill an appreciation for classic gaming. But we’ll allow it.

To make his BabyTV go, [Nikolai] used a 16×16 WS2812B LED panel and an Arduino Nano. Two rotary encoders are used to allow adjusting brightness and change the character currently being shown on the screen. As a particularly clever hack, the Arduino has an IR sensor attached and is constantly watching for any signals. If an IR signal is detected, the BabyTV switches to the next image. So if Junior has a standard IR remote in his hands, any button he presses will cause the display to change to the next “channel”.

Historically speaking we haven’t seen much stuff for children here at Hackaday, but 2018 seems to be changing that. Recent projects like the incredible scratch built mini excavator and gorgeous AT-ST high chair would seem to indicate we’re currently witnessing a generation of hackers become parents. Don’t panic folks, but we might be getting old.

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Fully 3D Printed Nerf Thirst Zapper

February 24, 2018 by Tom Nardi 6 Comments

In case you weren’t aware, there is a whole community out there that revolves around customizing NERF guns. In that community is a subculture that builds their own NERF guns, and within that group is a sub-subculture that 3D prints NERF guns. So next time you are contemplating how esoteric your little corner of the hacking world is, keep that in mind.

Anyway, [Wekster] is currently making his way in the world of 3D printed one-off NERF guns, and has unveiled his latest creation: a fully 3D printed “Thirst Zapper” from Fallout 4. Except for the springs, each and every piece of this gun was printed on his CR-10 printer. You could even wind your own springs if you really wanted to, and keep the whole thing in-house. Because if you’re going to do something this niche, you might as well go all in.

Even if you aren’t a member of the NERF-elite, the video [Wekster] has put together for this project is a fantastic look at what it takes to design, print, and finish a custom build. From creating the model to mixing the paint to match the in-game model, this video has a little something for everyone.

This isn’t the first time we’ve covered 3D printed NERF guns, but it’s surely the most ornate we’ve ever seen. Interestingly, the bar is set pretty high for Fallout-themed builds in general, so perhaps there’s some unwritten rule out there in regards to Fallout prop builds.

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3D Printing Brings A Child’s Imagination To Life

February 23, 2018 by Tom Nardi 25 Comments

Telling somebody that you’re going to make their dreams come true is a bold, and potentially kind of creepy, claim. But it’s one of those things that isn’t supposed to be taken literally; it doesn’t mean that you’re actually going to peer into their memories, extract an idea, and then manifest it into reality. That’s just crazy talk, it’s a figure of speech.

As it turns out, there’s at least one person out there who didn’t get the memo. Remembering how his father always told him about the elaborate drawings of submarines and rockets he did as a young boy, [Ronald] decided to 3D print a model of one of them as a gift. Securing his father’s old sketchpad, he paged through until he found a particularly well-developed idea of a personal sub called the CURV II.

The final result looks so incredible that we hear rumors manly tears may have been shed at the unveiling. As a general rule you should avoid making your parents cry, but if you’re going to do it, you might as well do it in style.

Considering that his father was coming up with detailed schematics for submarines in his pre-teen days, it’s probably no surprise [Ronald] has turned out to be a rather accomplished maker himself. He took the original designs and started working on a slightly more refined version of the CURV II in SolidWorks. Not only did he create a faithful re-imagining of his father’s design, he even went as far as adding an interior as well as functional details such as the rear hatch. Continue reading “3D Printing Brings A Child’s Imagination To Life” →