Homemade EDM Can Cut Through Difficult Materials Like Magnets With Ease

Many years ago [ScorchWorks] built an electrical-discharge machining tool (EDM) and recently decided to write about it. And there’s a video embedded after the break. The build is based on the designs described in the book “Build an EDM” by Robert Langolois. An EDM works by creating lots of little electrical discharges…... [Continue...]
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Vegapin: A Beautiful Virtual Pinball Machine

One click on the wrong YouTube link, and one sleepless night after being introduced to virtual pinball, and [Sascha Rossier], aka Swiss hip-hop rapper [Der Lügner], was at work on his own design. You can watch the plans, and the build progress on [Sascha]’s project diary (in German, translated here).…... [Continue...]
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Refurbishing Six Commodore 64s in Parallel

[Drygol] found himself with six Commodore 64’s in various states of disrepair. Because batch work is often more efficient, he detailed the process of restoring all of them in parallel in this one-, two-, three-part series. The first step was to whiten the cases. Old cases turn yellow from the…... [Continue...]
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Single Motor Lets This Robot Do the Worm

With more and more research in the field of autonomous robotics, new methods of locomotion are coming on the scene at a rapid pace. Forget wheels and tracks, forget bi-, quad-, hexa- and octopods, and forget fancy rolling BB-8 clones. If you want to get a mini robot moving, maybe…... [Continue...]
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Hackaday Prize Entry: The Strength Of 3D Printed Parts

[Sam Barrett] is doing something that is sorely needed. He’s doing real materials research on FDM parts. There’s nothing wrong with the rough experiments like hanging a 1 L bottle of water from the end of a rectangular test print to compare strengths. We also have our rules-of-thumb, like expecting…... [Continue...]
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Weird CPU

How many instructions does [agp.cooper’s] computer have? Just one. How many strip boards does it use? Apparently, 41. While being one shy from the answer to life, it is still a lot of boards for a single instruction. The high board count is due to the use of 1970’s vintage…... [Continue...]
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Building a Satellite-Tracking System With Cold War Tech

The things Hackaday readers come up with and post over on Hackaday.io never cease to amaze us. If you’ve never checked it out, be careful — you can easily spend hours (or weeks) of your life just skimming through the projects that have been logged there. Many of the builds use…... [Continue...]
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Photodiode Amplifier Circuit Spies on Your Phone

In order to help his friend prepare for a talk at DEFCON this weekend, [Craig] built an IR photodiode amplifier circuit. The circuit extended the detection range of the hack from a few inches to a few feet. We’re suckers for some well-designed analog circuitry, and if you are too, be…... [Continue...]
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Hacklet 119 – Retrogaming Console Hacks

If you haven’t heard, retrogaming is a thing. 40-somethings are playing the games of their youth alongside millennials who are just discovering these classic games. There are even folks developing new homebrew games for consoles as far back as the Nintendo Entertainment System and the Atari 2600. This week on…... [Continue...]
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Simplest Jumping Kangaroo Bot

One of the takeaway ideas that we got from BEAM robotics was the idea that the machine itself, rather than tons of processing power, can do a lot. Your hand affords gripping, and humans have made a pretty good living out of manipulating things (he says, typing). None of this…... [Continue...]
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Home Pool Added to Home Automation

Anyone who owns their own pool knows it’s not as simple as filling it up with water and jumping in whenever you want. There’s pool covers to deal with, regular cleaning with the pool vacuum and skimmers, and of course, all of the chemicals that have to be added to…... [Continue...]
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DEF CON: BSODomizing In High Definition

A few years ago, [Kingpin] a.k.a. [Joe Grand] (A judge for the 2014 Hackaday Prize) designed the most beautiful electronic prank ever. The BSODomizer is a simple device with a pass-through connection for a VGA display and an infrared receiver. Plug the BSODomizer into an unsuspecting coworker’s monitor, press a…... [Continue...]
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How Amica Paint protected tampering with its credits

In mid-1990, the floppy disk of special issue 55 of the German Commodore 64 magazine “64’er” contained the “Amica Paint” graphics program – which was broken beyond usefulness. I’ll describe what went wrong. “Amica Paint” was devloped by Oliver Stiller and first published in 64’er special issue 27 in 1988,…... [Continue...]
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Animated Progress Bar Shows LCD New Tricks

A small LCD screen can be extremely helpful with small microcontroller projects. Not everything needs to communicate to a fancy server using an ESP8266. However, if the simplicity of the character displays irks you, it’s possible to spice them up a little bit with custom characters and create animations, like…... [Continue...]
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Hackaday Prize Entry: Diagnosing Concussions

Athletes of every age receive a lot of blows to the head. After a few years of this and a lot of concussions, symptoms similar to Alzheimer’s can appear. For his Hackaday Prize entry, [Mihir] wanted to build a simple device that could be given to high school coaches that would…... [Continue...]
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Building a Full-Spectrum Digital Camera on the Cheap

The sensor on your digital camera picks up a lot more than just the light that’s visible to the human eye. Camera manufacturers go out of their way to reduce this to just the visible spectrum in order to produce photos that look right to us. But, what if you…... [Continue...]
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Fail Of The Week: The Pitfalls Of Designing A Wideband Radio

If you are someone whose interests lie in the field of RF, you won’t need telling about the endless field of new possibilities opened up by the advent of affordable software defined radio technology. If you are a designer or constructor it might be tempting to believe that these radios could…... [Continue...]
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Art and Creepy Mechanisms

Latvian artist [Krists Pudzens] just put on a show in Sweden and sent us the video of his amazing kinetic sculpture. (Embedded below.) We found an arty-theory writeup of another exhibition of his to share, but we had so many technical questions that we had to write him back asking for details.…... [Continue...]
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Hacking HAKKO 936

Simon Ludborzs writes: For many years I lived with dodgy epoxy fix on the handle, and finally swapped it out with a cheapie from eBay. All the HAKKO bits (tip, barrel, heating element) got transfered to the plastic handle and all was good in the world. Except for the heater…... [Continue...]
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