Most Useless Machine Upgrade — Now With A Button!

There’s a soft spot in our hearts for pointless projects, as long as they’re well executed. [Bertho] really hit the mark with his take on the most useless machine. We’ve seen several renditions of this concept, most of them hinging on a box that will turn a mechanical switch off whenever you turn it on. But this take uses a push button to activate a switch flipping mechanism on another part of the machine.

You can see the drive gears in the image above. The final gear has a small bar which flips a switch to one side or the other. The circuit does this without the need of a microcontroller. A 7400 series NAND gate chip, some passive components, and two mechanical relays are all it takes. At each push of the button, the logic chip trips one of the relays to trigger the appropriate motor direction based on the current state of that switch. You can press the button during movement, but all that will do is delay the inevitable flip of the switch.

Need Cheap And Plentiful Project Boxes? Hit Up Your Local Hardware Store

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One thing that really makes a project complete is the way in which you package your final product. Some people are fine with a piece of protoboard with wires sticking out in every direction, and truth be told, so are we – depending on the application.

[Daniel] over at archive.org was seeking out enclosures to wrap up some humidity and temperature monitors he was working on. He suddenly realized that electrical junction boxes were cheap, widely available, and perfectly suited for the job. He hauled off to the hardware store and bought a few different boxes, then spent some time cleaning them up a bit before putting them into service.

While he couldn’t put the PVC-based plastic lids into his laser cutter, he did grab some birch plywood at the store, which fit his needs nicely. A few minutes in the cutter and a few coats of paint later, he had some great looking covers for his project boxes. He added a piece of ply to the inside of the metal enclosures to protect his components, and when everything was finished, he was quite pleased with the results.

Let’s say you don’t happen to have a laser cutter on hand. Plastic boxes would do fine in most scenarios, but if you absolutely required a metal enclosure, a few coats of Plastidip on all interior surfaces would keep your electronics safe as well.

Now, no one is calling the use of junction boxes for electronics projects revolutionary by any means. It’s just one of those items you can blindly pass by in the hardware store countless times without giving them a second glance, until someone happens to point out that they would make a perfect enclosure. That’s something we can appreciate.

If you’re interested in putting some of your own together, [Daniel] has made his laser cutter templates available online.

Prison Inmates: The World’s Least Admirable Hackers

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One thing that always amazes us is the ingenuity displayed by prison inmates, as demonstrated in the tools and weapons they create while under the watchful eye of the law. Unlike most people however, these individuals have nothing but time on their side, which lends to the wide range of implements they inevitably dream up.

[Marc Steinmetz] took some time to photograph a handful of contraband items which were confiscated in various prisons. They range from the relatively benign bed sheet ladder to more sophisticated items such as battery-powered shotguns constructed from iron bedposts. While weaponry and escape aids are the most common prison yard creations, he also came across a DIY toaster, a hidden radio receiver, and one of our favorites – the surveillance bug pictured above, which was used to listen in on guards’ conversations.

While the use of any of these items in a controlled prison environment is questionable at best, it’s still interesting to see what people can hack together with limited resources and a heck of a lot of time.

[via Neatorama via Environmental Graffiti]

USB Reddit Upvote/Downvote Button

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[Chris] has recently become a self-declared Reddit addict and wanted to build something that would streamline the process of voting on posts. Inspired by the Awesome Button hack featured on Make a little while back, he thought that a physical upvote/downvote button would be the ideal peripheral for all of his Reddit needs.

He was a big fan of using the Reddit Enhancement Suite, which allows you to submit votes with a single keystroke. He combined this browser extension with a Teensy development board, and had his voting button prototyped in no time. Once he fine-tuned the Arduino sketch that he used to emulate the required keypresses, he got busy building a case for his creation.

He busted out his 3D printer and had a custom working project box in about 30 minutes. He printed arrows for the upvote and downvote buttons, snapped everything together, and then gave his quick vote box a spin. Everything worked perfectly, and he’s quite happy with his creation.

We imagine that our resident Reddit addict in chief is pretty jealous right about now…

Stick around if you’d like to see a time lapse video of the button’s creation.

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Putting A PDP-10 On An FPGA

[dgcx] has been working on reimplementing a PDP-10/x on an FPGA for the last 2 and a half years. This surprised us because we’re only hearing about this project now.

After designing three versions, [dgcx] eventually ended up with a one-FPGA implementation of a PDP-10 and an awesome PDF writeup. Although PDP-10 emulators do exist, this project isn’t an emulation – the system actually has the 36-bit word length of the original, implemented on five 4096 kilobit SRAM chips. This is a fully functioning replica, and even has CHAOSNET implemented with a small Ethernet controller.

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Wooden Machine Belongs In Willy Wonka’s Factory

Behold the wooden machine (translated) that is used for… well it does… it was built because… Okay, this is a case where asking what it does or why it was built is the wrong question. [Erich Schatt] began building the piece that he calls “Wheels” back in 1995. It took just seven years to complete, and is made entirely of wood. The video after the break shows a multitude of moving parts.

The chains were modeled after bicycle chains, which are used to transfer motion from the “rider” throughout the machine. The gearing for each segment was meticulously calculated, then perfected through trial and error. The complexity even calls for a differential and universal joints. It’s mesmerizing to watch and for that reason it’s made appearances at conventions and been featured in art exhibitions.

It’s also worth mentioning that this comes from a very humble-looking shop. [Erich] posted some pictures of his studio and aside from the abundance of bar clamps, it’s just your average garage or basement setup.

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Making And Selling Star Wars Costumes Ruled To Be Legal

 

[Andrew Ainsworth] has been making and selling costumes based on Star Wars character (some original, and some of his own creation) for several years. Lucasfilm sued him for $20 million back in 2004 claiming infringement of intellectual property rights. He stopped selling them in the US (as it was a US copyright) but now the UK Supreme Court has ruled in his favor, siding with his claim that the costumes are functional items and not works of art.

Good for him, but copyright issues aren’t what interests us here. The BBC clip showing him using a vacuum former to make the Stormtrooper helmet really caught our attention. A bit of further searching led us to find the thirteen minute video after the break showing the entire process, from sculpting the mold by hand, to forming the components, and the final assembly seen above. It’s a fascinating process that makes use want to build our own vacuum former (preferably on a larger scale than this one). It would come in handy whether it’s Star Wars, Daft Punk, or any number of other projects you’ve got in mind.

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