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You Didn’t See Graphite Around This Geiger Counter
Even if you don’t work in a nuclear power plant, you might still want to use a Geiger counter simply out of curiosity. It turns out that there are a lot of things around which emit ionizing radiation...
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An RFID Ring For The Body Mod Squeamish
Some people get inked, while others get henna or those water transfer tattoos you might find in a box of Cracker Jack. [Becky] wanted the benefits of having an RFID tag in her finger — unlock doors or...
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Cheap Stereo Microscope Helps With SMD
Soldering is best done under magnification. Parts become ever smaller and eyes get weaker, so even if you don’t need magnification now, you will. [Makzumi] didn’t want to shell out $400 or more for a...
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Plasma-Powered Thrusters For Your Homebrew Satellite Needs
It seems as though every week we see something that clearly shows we’re living in the future. The components we routinely incorporate into our projects would have seemed like science fiction only a...
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Can You Really Use the Raspberry Pi 4 as a Desktop Machine?
When the Raspberry Pi 4 was released, many looked at the dual micro HDMI ports with disdain. Why would an SBC like the Raspberry Pi need two HDMI ports? The answer was that the Pi 4 is finally fast...
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Cheese Grater Now Grates Cheese
If you’ve been using Apple products since before they were cool, you might remember the Power Mac G5. This was a time before Apple was using Intel processors, so compatibility issues were high and...
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Machine Learning with Microcontrollers Hack Chat
Join us on Wednesday, September 11 at noon Pacific for the Machine Learning with Microcontrollers Hack Chat with Limor “Ladyada” Fried and Phillip Torrone from Adafruit! We’ve gotten to the point where...
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How’s That 2.5D Printer Working For You?
We’ve noticed a trend lately that advanced 3D printing people are calling their normal print setup as 2.5D, not 3D. The idea is that while the machine has 3 axes, the actual geometry generation is...
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This CT Scan Of A PCB Is The Accidental ASMR We Didn’t Know We Needed
At risk of getting any ASMR buffs who might be reading cranky because there’s no audio, [Chris], or [@no1089] on Twitter, has gifted us with this visually stunning scan of his Maxim MAX86160 in-ear...
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Core Rope Memory Makes One Of The Oddest LED Flashers We’ve Ever Seen
If you’ve heard of core rope memory, it will probably be in the context of vintage computing equipment such as Apollo-era NASA hardware. A string of magnetic cores and sense wires form a simple ROM...
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Detecting Cars with an ESP8266 Magnetometer
Having a motorized gate on your driveway is great, but only if there’s an easy way to trigger it. [Andrew] says the gate at his parent’s place could only be controlled by manually pushing a button on...
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Norovirus Smartphone: Using Megapixels and Microfluidics to Fight the Other...
Chances are pretty good that at some time in your life, you’ve crossed paths with a norovirus. And chances are that you remember the encounter vividly, or at least its aftermath. I recall a run-in with...
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Because Conventional Laser Harps Aren’t Dangerous Enough
In the late 1980s, the French musician [Jean-Michel Jarre] famously toured with a laser harp. The word among teenage fans was that he had to wear special gloves to stop his hands getting burned,...
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Warwalking For Radiation
Can’t find a recently updated survey of radioactivity in your neighborhood? Try [Hunter Long]’s DIY scintillation counter warwalking rig. (Video also embedded below.) What looks like a paint can with...
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Does Your Home Assistant Know When You are Sleeping?
It always gives us a sense of wonder when we realize that what would be a simple task for a human child is a big deal for a computer. For example, if you asked someone if you or someone else was in...
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Pan and Tilt to a New 3D Printed Business Model
When shooting video, an easy way to get buttery smooth panning and tracking is to use a mechanical device like a rail to literally slide the camera side to side. These range from what is essentially a...
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Lambdas for C — Sort Of
A lot of programming languages these days feature lambda functions, or what I would be just as happy to call anonymous functions. Some people make a big deal out of these but the core idea is very...
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Using Machinery to Make Factory-Fresh Industrial Music
Many machines make music as a side effect, as anyone who owns a 3D printer can confirm. [工場音楽レーベルINDUSTRIAL JP] is working on a project to meld music and machinery in new ways. They are building a...
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10-Way Game Console Lets Everyone Play
[Bitluni]’s motto seems to be, “When you’re busy, get busier.” At least that would explain adding even more work to his plate in the run-up to the Hanover Maker Faire and coming up with a ten-player...
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Smoothieboard Gets An Ambitious Update For V2
If you’ve been reading Hackaday for awhile, there’s an excellent chance you’ve seen a project or two powered by the Smoothieboard. The open source controller took Kickstarter by storm in 2013,...
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