Single Bit Computer from Vacuum Tubes
https://hackaday.com/2021/12/27/single-bit-computer-from-vacuum-tubes/

Image from project Hackaday.io gallery
" data-image-caption="" data-medium-file="https://hackaday.com/wp-content/uploads/2021/12/bit1-feature.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2021/12/bit1-feature.jpg?w=800">Culminating a year-long project, [Usagi Electric] aka [David] has just wrapped up his single-bit vacuum tube computer. It is based on the Motorola MC14500 1-bit industrial controller, but since [David] changed …read more (https://hackaday.com/2021/12/27/single-bit-computer-from-vacuum-tubes/)

Voice Command Made Mostly Easy
https://hackaday.com/2021/12/27/voice-command-made-mostly-easy/

Speech commands are all the rage on everything from digital assistants to cars. Adding it to your own projects is a lot of work, right? Maybe not. [Electronoobs] shows a …read more (https://hackaday.com/2021/12/27/voice-command-made-mostly-easy/)

Custom Christmas Light Controller Blocks Blinks
https://hackaday.com/2021/12/27/custom-christmas-light-controller-blocks-blinks/

Finding that his recently purchased LED Christmas lights defaulted to an annoying blinking pattern that took a ridiculous seven button presses to disable each time they were powered up, [Matthew …read more (https://hackaday.com/2021/12/27/custom-christmas-light-controller-blocks-blinks/)

Turing Ring is Compact
https://hackaday.com/2021/12/28/turing-ring-is-compact/

One of the problems with a classic Turing machine is the tape must be infinitely long. [Mark’s] Turing Ring still doesn’t have an infinite tape, but it does make it …read more (https://hackaday.com/2021/12/28/turing-ring-is-compact/)

Laser Doping His Way to Homemade Silicon Chips
https://hackaday.com/2021/12/28/laser-doping-his-way-to-homemade-silicon-chips/

It’s a pity that more electronics enthusiasts haven’t taken the hobby to its ultimate level: making your own semiconductors. There are plenty of good reasons for that: chief among them …read more (https://hackaday.com/2021/12/28/laser-doping-his-way-to-homemade-silicon-chips/)

Quantum Atomic Interferometer For Precision Motion Sensing
https://hackaday.com/2021/12/28/quantum-atomic-interferometer-for-precision-motion-sensing/

The current state of the art of embedded motion sensing is based around micro-electromechanical systems (MEMS) devices. These miracles of microfabrication use tiny silicon structures, configured to detect acceleration and …read more (https://hackaday.com/2021/12/28/quantum-atomic-interferometer-for-precision-motion-sensing/)

The Pinouts Book is Here, and It’s Just What You Need
https://hackaday.com/2021/12/28/the-pinouts-book-is-here-and-its-just-what-you-need/