Over on YouTube [Lockdown Electronics] reviews an old bit of kit known as the Silicon Controlled Rectifier (SCR). Invented in the 1950s the SCR is a type of thyristor and …read more (https://hackaday.com/2025/12/28/retro-semiconductors-the-silicon-controlled-rectifier/)

Streaming Music to Cassette
https://hackaday.com/2025/12/28/streaming-music-to-cassette/

In almost every measurable way, a lossless digital audio file is superior to any analog media. This doesn’t mean that analog audio isn’t valuable though; plenty of people appreciate the …read more (https://hackaday.com/2025/12/28/streaming-music-to-cassette/)

The Birotary Engine Explained
https://hackaday.com/2025/12/28/the-birotary-engine-explained/

Everyone generally knows about piston and rotary engines, with many a flamewar having been waged over the pros and cons of each design. The “correct” answer is thus to combine …read more (https://hackaday.com/2025/12/28/the-birotary-engine-explained/)

39C3: Hardware, and the Hard Bit
https://hackaday.com/2025/12/29/39c3-hardware-and-the-hard-bit/

The 39th annual Chaos Communication Congress (39C3) is underway, and it kicked off with a talk that will resonate deeply with folks in the Hackaday universe. [Kliment] gave an impassioned invitation …read more (https://hackaday.com/2025/12/29/39c3-hardware-and-the-hard-bit/)

Only Known Copy of UNIX V4 Recovered From Tape
https://hackaday.com/2025/12/29/only-known-copy-of-unix-v4-recovered-from-tape/

UNIX version 4 is quite special on account of being the first UNIX to be written in C instead of PDP-11 ASM, but it was also considered to have been …read more (https://hackaday.com/2025/12/29/only-known-copy-of-unix-v4-recovered-from-tape/)

How Wind Nearly Took Down Boulder NTP
https://hackaday.com/2025/12/29/how-wind-nearly-took-down-boulder-ntp/

NTP is one of the most interesting and important, but all to forgotten, protocols that makes the internet tick. Accurate clock synchronization is required for everything ranging from cryptography to …read more (https://hackaday.com/2025/12/29/how-wind-nearly-took-down-boulder-ntp/)

39C3: Hacking Washing Machines
https://hackaday.com/2025/12/29/39c3-hacking-washing-machines/

Many of us have them, few of us really hack on them: well, here we’re talking about large home appliances. [Severin von Wnuck-Lipinski] and [Hajo Noerenberg] were both working on …read more (https://hackaday.com/2025/12/29/39c3-hacking-washing-machines/)

Keebin’ with Kristina: the One with the Keyboard-Mouse, Again
https://hackaday.com/2025/12/29/keebin-with-kristina-the-one-with-the-keyboard-mouse-again/