Hackaday Dictionary: Mils and Inches and Meters (oh my)

Measuring length is a pain, and it’s all the fault of Imperial measurements. Certain industries have standardized around either Imperial or metric, which means that working on projects across multiple industries generally leads to at least one conversion. For everyone outside the last bastion of Imperial units, here’s a primer…... [Continue...]
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Arduino Replaces Bad AC Thermostat, Hacker Stays Cool

Most of North America has been locked in a record-setting heat wave for the last two weeks, and cheap window AC units are flying out of the local big-box stores. Not all of these discount units undergo rigorous QC before sailing across the Pacific, though, and a few wonky thermostats are…... [Continue...]
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From Project To Kit: Getting The Hardware Right

In the previous article in this series on making a personal electronic project into a saleable kit, we looked at the broader picture of the kit market for a new entrant, the importance of gauging whether or not your proposed kit has a viable niche and ensuring that it has…... [Continue...]
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DEF CON’s X86 Badge

This year’s DEF CON badge is electronic, and there was much celebrating. This year’s DEF CON badge has an x86 processor, and there was much confusion. The badge this year, and every year, was designed by [1057], and is built around an x86 processor. Specifically, this badge features an Intel…... [Continue...]
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DEFCON Thermometer

Redditor [mulishadan] — a fan of the movie WarGames — has created a singular thermostat in the form of a Defcon alert meter. Looking to learn some new skills while building, [mulishadan] tried their hand at MIG welding the 16g cold-rolled plate steel into the distinctive shape. A second attempt…... [Continue...]
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Hackaday Prize Entry: Helping Millions See Clearly

Slit lamps are prohibitively expensive in the third world areas of India where they are most needed. An invention that’s been around for over a hundred years, the slit lamp is a simple-in-concept way to see and diagnose a large array of ocular issues. Since they are relatively old by…... [Continue...]
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EMF: You Shall Find Us At The Sign Of The Jolly Wrencher

It’s frustrating, the reluctance of some of my fellow hackspace members to put the cordless drill battery back in the charger after use.  As this is being written I’ve just coaxed enough energy from the drill to make a few holes in a piece of PVC pipe that will form part of…... [Continue...]
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Photodiode amplifier design

Craig writes, “I recently designed an infrared sensor board (dubbed “IRis”) for my friend’s Defcon talk. This video walks through the circuit design of the photodiode amplifier, and discusses some of the pitfalls associated with photodiode amplifier design.” More details at Analog Zoo homepage.  All project files are available on github. Source:... [Continue...]
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DIY Linux Computer and 6LoWPAN Gateway

We toss together our own PCB designs, throwing in a microcontroller here or there. Anything more demanding than that, and we reach for a Raspberry Pi or BeagleBone (or an old Linksys router). Why don’t we just whip together a PCB for a small Linux computer? Because we don’t know…... [Continue...]
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Raspberry Pi 3 Gets USB, Ethernet Boot

The Raspberry Pi is a great computer, even if it doesn’t have SATA. For those of us who have lost a few SD cards to the inevitable corruption that comes from not shutting a Pi down properly, here’s something for you: USB Mass Storage Booting for the Raspberry Pi 3.…... [Continue...]
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How To Build Anything With Delrin And A Laser Cutter — Advanced Tricks

Everyone wants their prototypes to look polished, as opposed to looking like 3D-squirted weekend afterthoughts. The combination of Delrin and a Laser Cutter make this easy, especially if you learn a few tricks-of-the-trade that will make your assemply pop, both functionally and aesthetically. Last time, we took a deep dive into fabbing parts with…... [Continue...]
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When You Need a Scope, You Need a Scope

Sometimes there’s just no substitute for the right diagnostic tool. [Ankit] was trying to port some I2C code from an Arduino platform to an ARM chip. When the latter code wasn’t working, he got clever and wrote a small sketch for the Arduino which would echo each byte that came across I2C out…... [Continue...]
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Soldering TQFN with a distance

Mare writes: Here is my solution to this problem. First clamp the Ic to vise or ask your wife to hold the tweezers with the chip Next, use your sharpest soldering tip and apply some solder to the pads. Please keep in mind the chip has 0,5mm raster between pads.…... [Continue...]
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Root Mean Square

The first time I was in school for electrical engineering (long story), I had a professor who had never worked in the industry. I was in her class and the topic of the day was measuring AC waveforms. We got to see some sine waves centered on zero volts and…... [Continue...]
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Creo Arm Might be the SCARA You’re Looking For

A SCARA (Selective Compliance Assembly Robot Arm) is a type of articulated robot arm first developed in the early ’80s for use in industrial assembly and production applications. All robotics designs have their strengths and their weaknesses, and the SCARA layout was designed to be rigid in the Z axis, while…... [Continue...]
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Hackaday Prize Entry: Low Cost, DIY Thermal Imaging

A few years ago, thermal imaging sensors – cameras that could see heat – became very cheap. FLIR was going all-in with their Lepton module, and there were a number of clip-on cellphone accessories that gave the computer in your pocket the ability to see infrared. Fast forward a few…... [Continue...]
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Impressive Custom Built Blacksmith’s Forge

[EssentialCraftsman] is relatively new to YouTube, but he’s already put out some impressive videos. We really enjoyed an episode dedicated to a fixture in his shop, his large custom blacksmith’s forge. The forge is a custom cast vault of refractory that sits on a platter of fire bricks suspended on…... [Continue...]
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DIY PCB inspection microscope

Saulius made a DIY PCB inspection microscope and wrote a post on his blog detailing its assembly: Despite how good microscope you have, stand is still very important part of final assembly. And while there are many commercial ones made of cast iron, they might cost more than a microscope head itself.…... [Continue...]
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