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King of the Ring of Fire
Hunga Tonga-Hunga Ha‘apai is a giant volcano under the South Pacific Ocean, 3,000km (1,860mi) east of Australia.

Bright Lights, Big TV – DIY Ambient Lights
Televisions these days are technological marvels — absolutely massive yet paper-thin screens with crystal-clear 4K (or better) resolution, up to 120Hz refresh rates, high dynamic range (HDR) color and luminance, and other features that turn living rooms into amazing personal theaters.

ORB-sessed – LED Sphere
“Squaring the circle” is a mathematical challenge as old as geometry itself. The “Cube Orb” LED sphere inverts that goal and takes it to a new dimension.

Christiaan Huygens and the Pendulum Clock
The Scientific Revolution was a momentous time. Most historians of science agree that during this era — 1500 to 1700 CE — people started thinking differently, more scientifically, about the way the world worked.

Build Your First Combat Bot!
Want to build your own battle robot?

3D printed fractal vise
If you were on YouTube in June 2021, there’s a good chance you were recommended the video “Rare Antique Fractal Vise [Restoration]” by Hand Tool Rescue. The video showed a unique vise patented in 1913, and for most of us, it was like nothing we had ever seen (below).

Smart3: The Self-Solving Rubik’s Cube
In the summer of 2015, I went to my first Maker Faire, in Tokyo, Japan.

A Can Full of Tone
Vintage Gibson electric guitars had a special circuit for modifying the sound of the pickups: the Vari Tone (Figure A).

Recreating Galileo’s Sector
The sector, also known as the compass of proportion, is a fun and easy-to-use calculating device that uses the power of geometry to perform a variety of useful math jobs. Although at first glance a sector might seem as quaint and old-school as a slide rule, it can do at least a few maker-style jobs better, faster, […]

DIY Mobile Handwash Station
In times like these you learn to … lather up. Everybody needs hand hygiene, everywhere.

Get Barreled: How To Store Drinking Water
Most of us have experienced power outages. While brief interruptions are unpleasant, lengthy outages that can occur after severe weather, forest fires, and earthquakes can cause loss of food stored in refrigerators and freezers unless a backup generator is available.

Making Calculus With LEGO
Isaac Newton developed calculus back in the mid-1600s as a tool to explain physical phenomena, in particular the motions of planets. As it turned out, it was also a way to encode how things move and change more generally, from economies to populations of rabbits and foxes.