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Laser-Induced Graphene Supercapacitors From Kapton Tape

Laser-Induced Graphene Supercapacitors From Kapton Tape

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From the sound of reports in the press, graphene is the miracle material that will cure all the world’s ills. It’ll make batteries better, supercharge solar panels, and revolutionize medicine. While a lot of applications for the carbon monolayer are...

Visualizing Magnetic Memory With Core 64

Visualizing Magnetic Memory With Core 64

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For the vast majority of us, computer memory is a somewhat abstract idea. Whether you’re declaring a variable in Python or setting a register in Verilog, the data goes — somewhere — and the rest really isn’t your problem. You...

Escalating Privileges In Ubuntu 20.04 From User Account

Escalating Privileges In Ubuntu 20.04 From User Account

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Ubuntu 20.04 is an incredibly popular operating system, perhaps the most popular among the Linux distributions due to its ease-of-use. In general, it’s a fairly trustworthy operating system too, especially since its source code is open. However, an update with...

Teensy Controller For Powerful CNCs

Teensy Controller For Powerful CNCs

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It seems like every year, it gets a bit easier to build your own CNC. From the Enhanced Machine Controller (EMC) project of the early 1990s to Arduinos running Grbl in the late 2000s, the open source community has moved...

Rotary Plotter Draws On Bottles

Rotary Plotter Draws On Bottles

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A pen plotter is often the first experience many ambitious makers have of the world of Computer Numerical Control, or CNC. While they typically operate on flat stock, with the right build, they can be designed to draw on curved...

Aircraft Radio Bares All

Aircraft Radio Bares All

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There is a certain charm to older electronics gear. Heavy metal chassis and obviously hand-wired harness can be a work of art even if they would be economically impractical for most modern gear. Watching [msylvain59’s] tear down of a Collins...

Homebrew Slide Rule Gets Back To Mathematical Basics

Homebrew Slide Rule Gets Back To Mathematical Basics

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In the grand scheme of things, it really wasn’t all that long ago that a slide rule was part of an engineer’s every day equipment. Long before electronic calculators came along, a couple of sticks of wood inscribed with accurate...

Really Useful Robot

Really Useful Robot

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[James Bruton] is an impressive roboticist, building all kinds of robots from tracked, exploring robots to Boston Dynamics-esque legged robots. However, many of the robots are proof-of-concept builds that explore machine learning, computer vision, or unique movements and characteristics. This...