Create Aerated Concrete Using Xanthan Gum and Dishwashing Liquid
https://hackaday.com/2025/12/28/create-aerated-concrete-using-xanthan-gum-and-dishwashing-liquid/
https://hackaday.com/2025/12/28/create-aerated-concrete-using-xanthan-gum-and-dishwashing-liquid/
To make aerated concrete, add a foam-forming agent and stir in a significant amount of air. This serves to make the concrete significantly lighter, better insulating, and more resilient to …read more (https://hackaday.com/2025/12/28/create-aerated-concrete-using-xanthan-gum-and-dishwashing-liquid/)
Photographing Cosmic Rays with a Consumer Camera
https://hackaday.com/2025/12/28/photographing-cosmic-rays-with-a-consumer-camera/
The reason photographic darkrooms are needed is because almost any amount of light can ruin the film or the photographic paper before they are fixed. Until then these things are …read more (https://hackaday.com/2025/12/28/photographing-cosmic-rays-with-a-consumer-camera/)
https://hackaday.com/2025/12/28/photographing-cosmic-rays-with-a-consumer-camera/
The reason photographic darkrooms are needed is because almost any amount of light can ruin the film or the photographic paper before they are fixed. Until then these things are …read more (https://hackaday.com/2025/12/28/photographing-cosmic-rays-with-a-consumer-camera/)
Retro Semiconductors: The Silicon Controlled Rectifier
https://hackaday.com/2025/12/28/retro-semiconductors-the-silicon-controlled-rectifier/
https://hackaday.com/2025/12/28/retro-semiconductors-the-silicon-controlled-rectifier/
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/
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/
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/
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/
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/)