The Last Meccano Factory Is To Close. Will We Miss It?

If we were to talk to engineers about the childhood toys which most inspired them, it’s likely that the older among them would mention either Meccano or Erector Set. These similar construction toys using metal components originated independently around the turn of the 20th century in both Britain and America, and eventually became part of the same company.

They were a staple of toy shops through the middle of the century, but have steadily declined in popularity over the past few decades. Now news has emerged that the last dedicated Meccano factory, in Calais, France, is to close. The products will still be made, but in other factories alongside other toys. It’s not the end for Meccano or Erector Set, but it’s clear that they are both toys whose time may have passed.

It’s fair to say that the possibilities of those perforated metal sheets and myriad nuts and bolts might seem a little limited for the 2020s child, but it opens the age-old question of what remains to interest young minds in engineering or technology. The obvious answer to that question comes in the form of Lego, evidently so much more fun can be had with plastic bricks.

Did you have Meccano or Erector Set when you were a kid? If so what did you do with it? We’ve seen a few projects using it here over the years.

Header: Alf van Beem, CC0.

Dad Builds Frickin’ Tank For His Son

We gotta love hacker Dads and Moms for being so awesome. Sooner or later, their kids get to play with some amazing toy that every other kid on the block is jealous of. [Meanwhile in the Garage aka MWiG] is one of those super hacker Dads who built a frickin’ Tank for his son (video, embedded below.). But it’s so much fun driving that beast around that we suspect Dad is going to be piloting it a lot more than the kid. The tank features metal tracks, differential steering, a rotating turret, periscopes and a functional paintball gun with camera targeting.

Building a tank, even if it’s a mini replica, needs an engine with a decent amount of torque. [MWiG] first tried reviving an old ATV engine, but it did nothing more than sputter and die. It went to the scrap heap after donating its rear transmission and axle. [MWiG] managed to get an old Piaggio scooter with a 250cc / 22 hp engine. The scooter gave up its engine, electricals and the instrument cluster before being scrapped. Looking at the final build, and the amount of metal used, we are left wondering how the puny 22 hp engine manages to drive the tank. We guess it’s the right amount of gearing for the win.

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CUTTING CABLES CURES TANGLED CORD CHAOS

The Toniebox is a toy that plays stories and songs for kids to listen to. Audio content can be changed by placing different NFC enabled characters that magnetically attach to the top of the toy. It can play audio via its built-in speaker or through a wired headphone connected to the 3.5 mm stereo jack. Using the built in speaker could sometimes be quite an irritant, especially if the parents are in “work from home” mode. And wired headphones are not a robust alternative, specially if the kid likes to wander around or dance while listening to the toy. We guess the manufacturers didn’t get the memo that toddlers and cables don’t mix well together. Surprisingly, the toy does not support Bluetooth output, so [g3gg0] hacked his kids Toniebox to add Bluetooth audio output.

[g3gg0] first played with the idea of transmitting audio via an ESP32 connected to the I²S interface, running a readily available A2DP library. While elegant, it is a slightly complex and time consuming solution. Using the ESP32 would also have affected the battery life, given the ESP32’s power hungry nature. Continue reading “CUTTING CABLES CURES TANGLED CORD CHAOS”

Toddler EV Gets Big Boy Battery Upgrade

No matter the type of vehicle we drive, it has a battery. Those batteries wear out over time. Even high end EV’s have batteries with a finite life. But when your EV uses Lead Acid batteries, that life is measured on a much shorter scale. This is especially true when the EV is driven by a driver that takes up scarcely more space in their EV than a stuffed tiger toy! Thankfully, the little girl in question has a mechanic:

A 3d printed adapter sends go-juice to the DC-DC converter

Her daddy, [Brian Lough], who documented the swift conversion of his daughter’s toy truck from Lead Acid to Li-Ion in the video which you can see below the break.

Facing challenges similar to that of actual road worthy passenger vehicles, [Brian] teamed up with [bitluni] to solve them. The 12 V SLA battery was being replaced with a 20 V Li-Ion pack from a power tool. A 3d printed adapter was enlisted to break out the power pins on the pack. The excessive voltage was handled with a DC-to-DC converter that, after a bit of tweaking, was putting out a solid 12 V.

What we love about the hack is that it’s one anybody can do, and it gives an inkling of what type of engineering goes into even larger projects. And be sure to watch the video to the end for the adorable and giggly results!

Speaking of larger projects, check out the reverse engineering required in this Lead Acid to Li-Ion conversion we covered in 2016.

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Hacking A Jack-in-the-Box To Be Extra Surprising

A Jack-In-The-Box is scary enough the first time. However, if you’ve seen the clown pop out before, it fails to have the same impact. [Franklinstein] decided that swapping out the clown for an alternative payload would deliver the fright he was after.

Inside the toy, an Arduino Nano runs the show. It’s paired with an airhorn, installed in a special frame along with an RC servo. When the time is right, the RC servo presses up against the airhorn, firing off an almighty noise. There’s also a confetti blaster, built with a small chamber full of compressed air. When a solenoid is released, the compressed air rushes out through a funnel full of confetti, spraying it into the room.

When the crank on the toy is turned, the typical song plays. When the lid of the box opens, it releases a switch, and the Arduino fires off the confetti and airhorn. It’s shocking enough for [Franklinstein] himself, and even more surprising for those expecting the toy’s typical bouncing clown instead.

We’d love to see an even more obnoxious version that doesn’t turn the airhorn off for at least a full minute. We’ve seen them employed in some great Halloween hacks before, too. Video after the break.

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A Most Unconventional Lego Walker

Lego Technic is a wonderful thing, making it easy to toy around with all manner of complicated mechanical assemblies without needing to do any difficult fabrication. [touthomme] recently posted one such creation to Reddit – a walker design that is rather unconventional.

The design dispenses with individually-actuated legs entirely. Instead, the two front legs are joined by an axle which pivots the legs about the body, which is shaped like an oval track. The rear legs are the same. A motorized carriage then travels along the oval track. When the weighted carriage reaches the front of the oval track, it forces the body to tip forwards, pivoting around the front legs and flipping the entire body over, swinging the rear legs forwards to become the front. The cycle then repeats again.

The flipping design, inspired by a toy, is something you wouldn’t expect to see in nature, as few to no animals have evolved mechanisms capable of continual rotation like this. It’s also unlikely to be a particularly efficient way of getting around, and the design would certainly struggle to climb stairs.

Some may claim the method of locomotion is useless, but we don’t like to limit our imaginations in that way. If you can think of a situation in which this walker design would be ideal, let us know in the comments. Alternatively, consider other walking designs for your own builds.  Video after the break.

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Attack Of The Eighty-Foot String Shooter

String shooters are exciting because they adhere to the laws of physics in that peculiar way that makes us ask, “How?” and “Why?” After a bit of poking and prodding, maybe some light rope burn, we probably have a few ideas on how we’d make our own. [Nick Belsten] and [Joey Rain] saw some desktop models and thought, “Let’s make that puppy eighty feet long!” Video also embedded after the break.

Instead of hobby motors, flashlight batteries, and toy car wheels, they choose a washing machine motor and bike tires, then plug into an extension cord. The three-minute video isn’t a how-to build because once you start welding this kind of hardware together, you are already flying by the seat of your pants. You will see a front yard with people delighting in the absurdity of launching rope continuously over the treetops. There’s plenty of room for observing a wave traveling along the cord or polishing your fingernails in a hurry.

We want to make string shooters for the office and add our personal flavor, like lights or colored string so they’re safe to touch. If you have a unique twist on any physics experiments, drop us a line, but for insurance reasons, we’ll add that you should not make a chainsaw without a guide bar, aka, the forbidden chain-saber.

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