New Part Day: Wireless BeagleBones On A Chip

The BeagleBone is a very popular single board computer, best applied to real-time applications where you need to blink LEDs really, really fast. Over the years, the BeagleBone has been used for stand-alone CNC controllers, the brains behind very large LED installations, and on rare occasions has been used to drive CRTs.…... [Continue...]
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3D Printed Acoustic Holograms: Totally Cool, Not Totally Useless

If you wave your hand under the water’s surface, you get a pattern of ripples on the surface shortly thereafter. Now imagine working that backwards: you want to produce particular ripples on the surface, so how do you wiggle around the water molecules underneath? That’s the project that a crew from…... [Continue...]
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Ghetto Ribbon Connector

[Marcel] was trying to shoehorn a few new parts into his trusty Nexus 5 phone. If you’ve ever opened one of these little marvels up, you know that there’s not much room under the hood to work with. Pulling out some unnecessary parts (like the headphone jack) buys some space,…... [Continue...]
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Putting Sand, Water, and Metal into A 3D Print

[Adam] over at Makefast Workshop writes about some of the tests they’ve been running on their 3D printer. They experimented with pausing a 3D print midway and inserting various materials into the print. In this case, sand, water, and metal BBs. The first experiment was a mixture of salt and water used…... [Continue...]
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The Hackaday Prize: An Open Electric Wheelchair

[Irene Sans] and [Alvaro Ferrán Cifuentes] feel that electric wheelchairs are still too expensive. On top of that, as each person’s needs are a little different, usually don’t exactly fit the problems a wheelchair user might face. To this end they’ve begun the process of creating an open wheelchair design…... [Continue...]
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PIC32 DMA SPI

[Mike] wanted to drive several SPI peripheral from a PIC32. He shows how much latency his conventional interrupt handlers were taking away from his main task. He needed something more efficient. So he created the SPI channels using DMA. He also made a video (see below) with a very clear…... [Continue...]
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Shop Made Squareness Comparator

[Stefan Gotteswinter] has a thing for precision. So it was no surprise when he confessed frustration that he was unable to check the squareness of the things he made in his shop to the degree his heart desired. He was looking enviously at the squareness comparator that [Tom Lipton] had…... [Continue...]
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Restoring a vintage Xerox Alto day 8: it boots!

We’ve been restoring a Xerox Alto from the 1970s for several months, and we finally got it to boot and run some programs! There’s still some hardware debugging ahead of us, since the Alto drops into the debugger for many programs, but we’re quite happy to see the system running.…... [Continue...]
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Reverse engineering a server CPU voltage regulator module

Andy Brown wrote an article on reverse engineering a CPU voltage regulator: A recent ebay fishing expedition yielded an interesting little part for the very reasonable sum of about five pounds. It’s a voltage regulator module from a Dell PowerEdge 6650 Xeon server. I originally bought this because I had…... [Continue...]
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Electronic Message In a Bottle

We remember going to grandfather’s garage. There he would be, his tobacco pipe clenched between his teeth, wisps of smoke trailing into the air around him as he focused, bent over another of his creations. Inside of a simple glass bottle was something impossible. Carefully, ever so carefully, he would use his custom tools to twist wire. He would…... [Continue...]
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Ig Nobel Prizes: GoatMan, Volkswagen, and the Personalities of Rocks

Every year, the Journal of Improbable Research issues its prizes for the craziest (published) scientific research: the Ig Nobel Prize. The ceremony took place a couple nights ago, and if you want to see what you missed, we’ve embedded the (long) video below. (Trigger warning: Actual Nobel laureates being goofy.)…... [Continue...]
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Hackaday Prize Entry: Raspberry Pi Thermal Imaging

High up on the list of desirable technologies that are edging into the realm of the affordable for the experimenter is the thermal camera. Once the exclusive preserve of those with huge budgets, over the last few years we’ve seen the emergence of cameras that are more affordable, and most…... [Continue...]
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Hackaday Links: September 25, 2016

So you like watching stupid stuff? Here you go, a scene from Bones that tops the infamous ‘IP backtrace with Visual Basic’ or ‘four-handed keyboard’ scenes from other TV shows. Someone hacked the bones by embedding malware in a calcium fractal pattern. Also, when she uses the fire extinguisher, she doesn’t spray…... [Continue...]
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Air-Powered Top Only Possible on a 3D Printer

One of the major reasons anyone would turn to a 3D printer, even if they have access to a machine shop, is that there are some shapes that are not possible to make with conventional “subtractive manufacturing” techniques. There are a few more obvious reasons a lot of us use 3D…... [Continue...]
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Sending Music Long Distance Using A Laser

This isn’t the first time we’ve seen DIYers sending music over a laser beam but the brothers [Armand] and [Victor] are certainly in contention for sending the music the longest distance, 452 meter/1480 feet from their building, over the tops of a few houses, through a treetop and into a…... [Continue...]
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Rubidium Disciplined Real Time Clock

[Cameron Meredith] starts the Hackaday.io page for one of his projects by quoting a Hackaday write-up: “A timepiece is rather a rite of passage in the world of hardware hacking“. We stand by that assertion, but we’d say most of the clocks we feature aren’t as capable as his project. He’s…... [Continue...]
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Catching Lightning With High Voltages And A Kite

Flying a kite on a stormy day is not the wisest thing to do, except, of course, you’re intentionally trying to catch a lightning bolt. The guys from [kreosan] replicated the famous experiment, with which Benjamin Franklin once set out to prove the electrical nature of lightning. After their first attempt…... [Continue...]
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Solenoid Engine with Woodworking Chops

Simple, elegant, and well executed. This solenoid engine build is everything we’ve come to love about [Matthias Wandel]’s work. If you don’t recognize his name you probably remember the name of his site: Wood Gears. In what feels like an afternoon project he put together a solenoid engine. It translates…... [Continue...]
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Hackaday Prize Entry: Theia IoT light-switch

There are it seems no wireless-enabled light switches available in the standard form factor of a UK light switch. At least, that was the experience of [loldavid6], when he decided he needed one. Also, none of the switches he could find were open-source, or easy to integrate with. So he…... [Continue...]
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