How to extract a file hierachy from a docker image and run it in a container with systemd-nspawn.

H.P. Friedrichs (AC7ZL) made this audio amplifier by using a VFD as a triode. A neat idea I've seen on hackaday a few times. Some characteristic curves are provided at the end of the article.

A documentary following two attempts by Gary Robbins to finish the Barkley Marathons (2016 and 2017). I recommend first watching the documentary titled "The Barkley Marathons: The Race That Eats Its Young" (available on Netflix) to get an idea of what the race is all about.

Robbins ran again this year (2018) and was the only person to finish the fun run (but didn't make the cutoff for lap 4).

How to write a very simple (non-optimizing) JIT compiler.

The best VDOT calculator I've found (for finding suitable training paces according to Jack Daniels' running formula).

A calculator which uses the result of a recent race to "generate training paces, race prediction, with adjustments for temperature, body weight and altitude. This calculator works by estimating your V̇O2max and using that to predict your race times and training paces."

It's a shame Jack Daniels requested to have the vdot calculation removed from this calculator in an attempt at commercializing his research to the detriment of the wider running community.

"In 1880, Frank Hart wowed audiences at New York’s Madison Square Garden by walking 565 miles in six days."

I like these little 1- and 3-key USB keyboards.

A nice overview of Jack Daniels' training method.

This is how I fix things... only I'm not so quick.

FiveThirtyEight writer Oliver Roeder's entertaining account of his game against Magnus in a recent simul.

Modeling transistors and logic gates with Unix pipes.

Nicolas Seriot's JSON test suite with results against many existing parsers and a new reference parser written in Swift.

"Earl William 'Madman' Muntz (January 3, 1914 – June 21, 1987) was an American businessman and engineer... He invented the practice that came to be known as Muntzing, which involved simplifying otherwise complicated electronic devices. Muntz produced and marketed the first black-and-white television receivers to sell for less than $100"

Hat tip to a recent EEVblog video for bringing up Muntz and the practice of Muntzing.

DrDrunkenstein AKA Magnus Carlsen streaming himself drinking, listening to Eminem, and playing bullet chess for two hours.

This was the 4th Lichess Titled Arena tournament: https://lichess.org/blog/Ws917iQAAH0Eftbz/gm-magnus-carlsen-wins-fourth-consecutive-lichess-titled-arena

An overview of JST and similar crimp connectors.

Ben Katz and Jared Di Carlo built this fast Rubik's cube solving machine (six servomotors and two cameras solve a cube in 0.38 seconds).

This project in progress by Radical Brad looks really neat. It is a graphics co-processor (including an entire 6502-compatible CPU?) for the Commordore VIC-20 made in 7400 logic running at 25Mhz on a solderless breadboard (though I think he plans to create a PCB for it eventually).

Linus Åkesson (lft) converted an old electronic organ into a MIDI controller and 8-bit synthesizer using two 8-bit ATmega88 microcontrollers. The synthesizer sounds very NES-ish with its bright square+triangle+noise oscillators. lft is musician and has several videos of himself on youtube playing very nice renditions of various chiptunes (from memory) on his Chipophone.

All about neon tube ring counters, and other non-standard ways to drive nixie tube clocks.