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3D Printed Swirl Rocket Injector Turns up the Heat
Conceptually speaking, a liquid propellant rocket engine is actually a very simple piece of hardware. All you need to do is spray your fuel and oxidizer into the combustion chamber at the proper ratio,...
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Java On GPUs And FPGAs
There was a time when running a program on an array of processors meant that you worked in some high-powered lab somewhere. Now your computer probably has plenty of processors hiding in its GPU and if...
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There Really Was A Sewing Machine Controlled By A Game Boy
These days, high-quality displays and powerful microcontrollers are cheap and plentiful. That wasn’t the case a couple of decades ago, and so engineers sometimes had to get creative. The result of this...
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An RF Engineer’s FPGA Learning Journey
[KF5N] admits he’s not a digital design engineer; he’s more into the analog RF side of things. But he’s recently taken on a project to communicate between a Ubuntu box and an Intel MAX10 FPGA. He did...
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Welcome To The Open Hardware (Virtual) Summit
Readers are no doubt aware of the COVID-19 pandemic and the impact it’s having on many public gatherings. Some events have been curtailed, while others have been cancelled outright. Among the events...
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Build Your Own Mouse For High Performance
For the dedicated gamer or hardcore computer user, there’s plenty of options for high-end input peripherals. We’ve seen plenty of makers build their own bespoke keyboards, too. Less commonly seen are...
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MessagePack Is A More Efficient JSON
It is an age-old problem, that of having some data you want to store somewhere, and later bring it back. How do you format the data? Custom file formats are not that hard, but if you use an existing...
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One Anti-Static Ring to Delight Them All
What’s the worst thing about winter? If you’re as indoorsy as we are, then static electricity is probably pretty high on the list. It can ruin your chips, true, but you always wear a wrist ground...
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Inside a CAN Bus Mileage Manipulator
In the days of carburetors and leaf spring suspensions, odometer fraud was pretty simple to do just by disconnecting the cable or even winding the odometer backwards. With the OBD standard and the...
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This Compact Pi Terminal Will Show You the Way
The Raspberry Pi holds incredible promise for those looking to build a small mobile terminal that they can take with them on the go, something you can throw into your bag and pull out whenever there’s...
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LED Shirt Does It With Tulle
Given that we are living in what most of humanity would now call “the future”, we really ought to start acting like it. We’re doing okay on the electric cars, but sartorially we’ve got some ground to...
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Hearing Aid Reads Your Mind
If you’ve ever seen an experienced radio operator pull a signal out of the noise, or talked to someone in a crowded noisy restaurant, you know the human brain is excellent at focusing on a particular...
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This Barometer Looks Mighty Fine, Rain or Shine
Mythological legend has it that Tempestas, the Roman goddess of storms and sudden weather, saved the consul Scipio when his fleet of ships got caught in a storm off of Corsica. In return, she demanded...
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Hybrid Supercapacitors are — well — Super
Kurt.energy is promoting a new line of hybrid supercapacitors. By itself, that wouldn’t be very newsworthy, but the company claims these graphene-based supercapacitors merge the best features of both...
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The Ultimate Game Boy Talk
It is absolutely no exaggeration to say that [Michael Steil] gave the Ultimate Game Boy talk at the 33rd Chaos Communication Congress back in 2016. Watch it, and if you think that there’s been a...
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Manual To Hydraulic Press, With A Paint Sprayer
A press can be one of the most useful additions to a workshop, once you have one you will wonder how you ever coped beforehand when it came to all manner of pressing in and pushing out tasks. An arbor...
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Get Your Weather Images Straight from the Satellite
[Josh] has a series called Ham Radio Crash Course and a recent installment covers how you can grab satellite images directly from weather satellites. This used to be more of a production than it is...
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Powering Neon with a Joule Thief
Joule thief are small, fun circuits which exploit a few characteristics of electronics and LEDs in order to “steal” virtually all of the energy stored in a battery. They can operate at incredibly small...
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Digital Designer Teaches High School
We wish we had met [Mr. Mueller] when we were in high school. After 20 years as a digital design engineer, he decided to teach a digital electronics class at the high school level at LASA high school...
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Robotic Eels Take Care of Undersea Pipelines
We can’t tell if the Eelume actually exists, or if it’s just a good CG and a design concept, but when we saw the video below, we wanted to start working on our version of it immediately. What’s an...
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