Nice write up of a 10/22 takedown rifle build using a third party (Brownells) receiver

"Make it Yourself is a digital book that showcases this incredible talent, bringing together over 1000 useful DIY projects to demonstrate just what is possible when you make things yourself."

A stack machine that can play chess implemented in 84,688 python regular expressions.

Here's a game I played against it (I'm white -- it played as well as you'd expect from a 2-ply engine :)

https://lichess.org/Zc6aDiJ8

Linux connects a Family BASIC keyboard to an NES via a bespoke adapter in order to play its unique triangle waveform live.

A good series on how sensitive accuracy is to various factors of marksmanship (group tightness, consistency of ammo velocity, cartridge selection, wind calls...)