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Stomp Switches Let You Skip Tracks Hands-Free
You’ve (probably) got four limbs, so why are you only using half of them when you’re working on the computer? Just because your toes don’t have the dexterity to type (again, probably) doesn’t mean your...
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The Newbie’s Guide To JTAG
Do you even snarf? If not, it might be because you haven’t mastered the basics of JTAG and learned how to dump, or snarf, the firmware of an embedded device. This JTAG primer will get you up to snuff...
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Printing Liquid Concrete
In the world of additive manufacturing, there’s always need materials being added to the list of potential filaments to use for printing objects. A method of rapid liquid printing of concrete designed...
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Origami Butterfly: A Flex PCB Adventure Unfolds
Flexible circuits have been around longer than you might expect, although they only recently rounded the bend and bounced into the hobbyist’s toolbox. When Boldport fanatic [Laura Lindzay] found out...
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LoRa Tutorials For The DIY Masses
LoRa is the go-to tech for low power, long range wireless sensor networks. Designing with off-the-shelf modules can be a boon or a bane depending on the documentation and support. Luckily, [Renzo] has...
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Levitating Starship Model Comes In For a Landing
If everything goes according to plan, Elon Musk says the first generation of SpaceX’s massive Starship will make an orbital flight before the end of 2020. That’s a pretty bold claim, but when you’ve...
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Self-Playing Kalimba V2 Thanks to Readers Like You
Would you like to know the great thing about this community we have here? All the spitballing that goes on every day in the comments, the IO chat rooms, and in the discussion threads of thousands of...
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OpenAstroTracker Turns Your DSLR Into An Astronomy Instrument
If you want to take beautiful night sky pictures with your DSLR and you live between 15 degrees and 55 degrees north latitude you might want to check out OpenAstroTracker. If you have a 3D printer it...
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Gravity-Defying Water Droplet Fountain Gets An Upgrade
When we last saw [isaac879]’s levitating RGB time fountain, it was made of wood which meant that it would absorb water and didn’t really show off the effect very well. His new version solves this...
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Developing Retro Games For Conference Badges With Kate Morris
PCB badges have exploded in popularity in recent years. Starting out as a fun token of entry to a conference, they’re now being developed by all manner of independent groups, with DEFCON serving as the...
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LoRa Mesh Network with Off-the-Shelf Hardware
An ideal application for mesh networking is off-grid communication; when there’s no cellular reception and WiFi won’t reach, wide-area technologies like LoRa can be used to create ad hoc wireless...
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OpenChronograph Lets You Roll Your Own Smart Watch
At first, smartwatches were like little tiny tablets or phones that you wore on your wrist. More recently though we have noticed more “hybrid” smartwatches, that look like a regular watch, but that...
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Be Wary Of Radioactive Bracelets And Similar
Before you start cutting up that ‘negative ion’ health bracelet or personal massager, be aware that these are highly likely to contain thorium oxide or similar radioactive powder, as this research...
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Magnets Make Prototyping E-Textiles a Snap
How do you prototype e-textiles? Any way you can that doesn’t drive you insane or waste precious conductive thread. We can’t imagine an easier way to breadboard wearables than this appropriately-named...
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Raspberry Pi 4 Offers Up 2 GB for the Price of One
The Raspberry Pi 4 represents a significant performance increase over previous generations, unlocking potential applications that were simply beyond the abilities of these diminutive Single Board...
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RC Ground Effect Vehicle Skims Over the Water
In the 1960s the Soviet Union began experimenting with what they called ekranoplans, ground effect vehicles (GEVs) that were something of a hybrid between a ship and a large airplane. Their stubby...
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MIL-SPEC Keyboard Now Salutes USB
When [easyjo] picked up this late ’80s Marconi mil-spec keyboard for cheap, he knew it wouldn’t be easy to convert it to USB — just that it would be worth it. Spoiler alert: those LEDs aren’t a mod,...
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Writing Arduino Libraries, An Expert View
The Arduino IDE has a bit of a split personality. On the one hand, it is a simple environment where you can just pick and choose a few libraries, write a few lines of code, and make lots of...
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The ZX Spectrum Next Arrives
Sinclair Research was best known in the United States for the tiny ZX80, and the ZX81, under its Timex branding. However, they also made the ZX Spectrum which had many features that were — at the time...
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Building Cameras For The Immersive Future
Thus far, the vast majority of human photographic output has been two-dimensional. 3D displays have come and gone in various forms over the years, but as technology progresses, we’re beginning to see...
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