Simple Automata Extravaganza

February 2, 2019 by Anool Mahidharia 15 Comments

[Federico Tobon] from [Wolfcat Workshop] spent Makevember in 2017 building a series of fascinating automata using the most basic of craft supplies and simple tools in his workshop. Using a combination of rigid materials such as wooden cubes, popsicle sticks, and paper clips and pliable ones like paper and rubber bands, his creations are way more delightful to play with compared to fidget spinners.

There are no assembly guides, instructions or building plans, but for a hacker, one look at these designs ought to be enough to glean how to build one, with some trial and error to get it right. And that is exactly what [Tobon] found to his delight. After sharing animated GIFs of his creations on social media, numerous other hackers built and shared their own versions of his designs as well as building some new ones.

He posts several other useful resources, some of which were the inspiration that got him started making these automata. All of them are pretty interesting, so do take a look at them too. There is a lot that young kids can learn from building these little machines, given some guidance and help from the elders. But the way we see it, it’s likely the old folks will enjoy them more.

The video after the break compiles all of the little machines for six minutes of viewing pleasure.

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Shred The Gnar Without Paddling For Waves

January 28, 2019 by Bryan Cockfield 10 Comments

[Ben Gravy] isn’t your average pro surfer. For one thing, he lives in New Jersey instead of someplace like Hawaii or Australia, and for another he became famous not for riding the largest waves but rather for riding the weirdest ones. He’s a novelty wave hunter, but some days even the obscure surf spots aren’t breaking. For that, he decided to build a surfboard that doesn’t need waves. (Video, embedded below the break.)

The surfboard that [Ben] used for this project isn’t typical either. It’s made out of foam without any fiberglass, which makes the board less expensive than a traditional surfboard. The propulsion was handled by an electric trolling motor and was hooked up to a deep cycle battery mounted in the center of the board in a waterproof box. The first prototype ended up sinking though, as most surfboards can’t support the weight of a single person on their own without waves even without all the equipment that he bolted to it.

After some reworking, [Ben] was able to realize his dream of riding a surfboard without any waves. It’s not fast, but the amount of excitement that he had proves that it works and could fool most of us. This hack has everything, too: a first prototype that didn’t work exactly right and was fixed with duct tape, electricity used in a semi-dangerous way, and solving a problem we didn’t know we had. We hope he builds a second, faster one as well.

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The Voice Of Dave, Now In Toy Form

January 26, 2019 by Lewin Day 13 Comments

Dave Jones is something of a celebrity in the hacker and maker communities, bringing his considerable knowledge and experience to bear on a wide variety of electronic and engineering topics. His unique voice and candor have endeared him to many, and he’s one of the more quotable YouTubers currently on the scene. With that in mind, [Andrei Aldea] decided to build a Speak ‘n’ Say in his honor.

The build was inspired by an earlier effort by [Ben Heck]. [Andrei] started by disassembling the Speak ‘n’ Say, and determined that there was a simple button matrix that would allow the toy’s position to be read easily. These buttons were wired into an Arduino Nano, which then reads an SD card and plays sound samples using the MP3 Module from DFR Robot.

[Andrei] made sure the toy was replete with custom graphics, which complete the look. Additionally, each Dave quote on the board has a series of soundbites, chosen randomly by the Arduino, giving a little more variety than the original toy.

It’s a fun build, and we’d love to see a version with line-out or some bigger speakers to blast the Gospel of Dave at a truly impressive volume. We’ve seen other speaking Arduinos, too – like this imposing HAL build. Video after the break.

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Custom Mini 4WD Runs On Steam

January 2, 2019 by Lewin Day 13 Comments

Tamiya’s Mini 4WD toy line primarily consists of small 1:32 scale toy cars powered by AA batteries, which have no remote control and are guided around a plastic track by horizontally oriented ~~drive~~ guide wheels. Tuning and racing these cars is popular in many parts of the world, but this build is a little different.

After initial experiments with a modified Tamiya chassis are unsuccessful, a fresh build using a bespoke aluminium chassis is begun. A sturdy boiler is created, feeding into a piston which is used to drive all four wheels through a series of driveshafts.

It’s interesting to watch the iterative design process solve various problems such as piston wear and gearing. Performance is underwhelming for those used to the immense speed of the electric toys, but we’d love to see a competition series using steam powered racers.

We don’t see a whole lot of steam hacks around here, but the Hudspith steam bicycle is something to marvel at. Video after the break.

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POV Tops Hobbyist Abilities

December 29, 2018 by Brian McEvoy 11 Comments

Sometimes a beautiful project is worth writing on that merit alone, but when it functions as designed,someone takes the time to create a thorough and beautiful landing page for their project, we get weak in the knees. We feel the need to grab the internet and point our finger for everyone to see. This is one of those projects that checks all our boxes. [Nathan Petersen] made a POV toy top called Razzler, jumping through every prototyping hoop along the way. The documentation he kept is what captured our hearts.

The project is a spinning top with an integrated persistence-of-vision (POV) display. That’s the line of LEDs that you see here. To sync up the patterns, the board includes an IMU, but detecting angular velocity with either gyroscope or accelerometer proved problematic. [Nathan’s] writeup of this is worth the read itself, but you’ll also enjoy the CNC workworking part of the project used to create the body of the spinning top.

This was [Nathan]’s first big solo project, and so many of the steps are explained by someone who just entered the deep-end very quickly. If you have experience, you may grin at the simplified reasonings, but for a novice, it makes for an approachable lesson. The way he selects hardware and firmware is pragmatic and perhaps even overkill, so you know he’s going into engineering. This overshot saved him when there were communication problems which needed a sacrifice of some processing power to run I2C on some GPIO.

We hope you enjoy reading about this combinations of POV, firmware (or is it?), and centrifugal force.

Vintage Toys Live On Through 3D Printing

December 24, 2018 by Tom Nardi 5 Comments

We all have fond memories of a toy from our younger days. Most of which are still easy enough to get your hands on thanks to eBay or modern reproductions, but what if your childhood fancies weren’t quite as mainstream? What if some of your fondest memories involved playing with 1960’s educational games which are now so rare that they command hundreds of dollars on the second-hand market?

That’s the situation [Mike Gardi] found himself in recently. Seeing that the educational games which helped put him on a long and rewarding career in software development are now nearly unobtainable, he decided to try his hand at recreating them on his 3D printer. With his keen eye for detail and personal love of these incredible toys, he’s preserved them in digital form for future generations to enjoy.

His replica of “The Amazing Dr. Nim” needed to get scaled-down a bit in order to fit on your average desktop 3D printer bed, but otherwise is a faithful reproduction of the original injection molded plastic computer. The biggest difference is that his smaller version uses 10 mm (3/8 inch) steel ball bearings instead of marbles to actuate the three flip-flops and play the ancient game of Nim.

[Mike] has also created a replica of “Think-a-Dot”, another game which makes use of mechanical flip-flops to change the color of eight dots on the front panel. By dropping marbles in the three holes along the top of the game, the player is able to change the color of the dots to create various patterns. The aim of the game is to find the fewest number of marbles required to recreate specific patterns as detailed in the manual.

Speaking of which, [Mike] has included scans of the manuals for both games, and says he personally took them to a local shop to have them professionally printed and bound as they would have been when the games were originally sold. As such, the experience of owning one of these classic “computer” games has now been fully digitized and is ready to be called into corporeal form on demand.

This is really a fascinating way of preserving physical objects, and we’re interested to see if it catches on with other toys and games which otherwise might be lost to time. As storage capacities get higher and our ability to digitize the world around us improve, we suspect more and more of our physical world will get “backed up” onto the Internet.

Power Wheels Gets Real With Real Wheels

December 19, 2018 by Tom Nardi 10 Comments

We’re no stranger to Power Wheels modifications, from relatively simple restorations to complete rebuilds which retain little more than the original plastic body. These plastic vehicles have the benefit of nostalgia to keep the adults interested, and naturally kids will never get tired of their own little car or truck to tear around the neighborhood in. Many toys come and go, but we don’t expect Power Wheel projects to disappear from our tip line anytime soon.

Today’s project starts with a straightforward Power Wheels restoration story: [myromes] picked up a well-worn Jeep and decided that it needed a fresh coat of paint and some tweaks before handing the keys over to the next generation. But in an interesting spin, he decided to try mounting proper pneumatic tires on it in hopes they might imbue the pint-sized Jeep with some of the abilities of its full scale inspiration. But as it turned out, the project wasn’t quite the Sunday drive he was hoping for.

For one thing, the new wheels were much thicker than the old ones. This meant cutting away some of the plastic where they mounted so he could get the shafts to slide all the way through. At 5/16″, the original Power Wheels shafts were also thinner than what the axle the wheels were designed for. Luckily, [myromes] found that a small piece of 1/2″ PEX water pipe made a perfect bushing. Then it was just a matter of buying new push nuts to lock them in place.

That got the front wheels on, but that was the easy part. The rears had to interface with the Jeep’s motors somehow. To that end, he cut out circles of plywood and used an equal amount of Gorilla Glue and intense pressure to bond them to the new wheels. He then drilled four holes in them which lined up with the original motor mounts so he could bolt them on.

Things were going pretty well until he tried to replace the Jeep’s rear axle with a length of threaded rod from the hardware store. It wasn’t nearly strong enough, and sagged considerably after just a few test rides. He eventually had to place it with a correctly sized piece of cold rolled steel rod to keep the car from bottoming out.

While the new wheels certainly perform better than the original hard-plastic ones, there’s a bit of a downside to this particular modification. The slippy plastic wheels were something of a physical safety to keep the motors and gearboxes from getting beat up to bad; with wheels that have actual grip, the Jeep’s stock gears are probably not long for this world. But [myromes] says he’s got plans for future upgrades to the powertrain, so hopefully the issue will be resolved before the little ones need a tow back home.

For more tales from the Power Wheels garage, you might want to take a look at this fantastic rebuild complete with digital speedometer or just head straight to the big leagues with some seriously upgraded rides.