You have that slide rule in the back of the closet. Maybe it was from your college days. Maybe it was your Dad’s. Honestly. Do you know how to use …read more (https://hackaday.com/2025/11/21/how-to-use-that-slide-rule/)

Microsoft Open Sources Zork I, II and III
https://hackaday.com/2025/11/21/microsoft-open-sources-zork-i-ii-and-iii/

The history of the game Zork is a long and winding one, starting with MUDs and kin on university mainframes – where students entertained themselves in between their studies – …read more (https://hackaday.com/2025/11/21/microsoft-open-sources-zork-i-ii-and-iii/)

It’s Hard to Make a (Good) Oscillator
https://hackaday.com/2025/11/22/its-hard-to-make-a-good-oscillator/

There’s more to making an oscillator than meets the eye, and [lcamtuf] is here with a good primer on the subject. It starts with the old joke that if you …read more (https://hackaday.com/2025/11/22/its-hard-to-make-a-good-oscillator/)

Baby’s First Synth was Daddy’s First Project
https://hackaday.com/2025/11/22/babys-first-synth-was-daddys-first-project/

We absolutely adore inspired labor-of-love tales such as this one. [Alastair] wanted to build a synth for his daughter’s third birthday in spite of having no prior hardware knowledge. It …read more (https://hackaday.com/2025/11/22/babys-first-synth-was-daddys-first-project/)

Why Do We Love Weird Old Tech?
https://hackaday.com/2025/11/22/why-do-we-love-weird-old-tech/

One of our newer writers, [Tyler August], recently wrote a love letter to plasma TV technology. Sitting between the ubiquitous LCD and the vanishing CRT, the plasma TV had its …read more (https://hackaday.com/2025/11/22/why-do-we-love-weird-old-tech/)

RavynOS: Open Source MacOS with Same BSD Pedigree
https://hackaday.com/2025/11/22/ravynos-open-source-macos-with-same-bsd-pedigree/

That MacOS (formerly OS X) has BSD roots is a well-known fact, with its predecessor NeXTSTEP and its XNU kernel derived from 4.3BSD. Subsequent releases of OS X/MacOS then proceeded …read more (https://hackaday.com/2025/11/22/ravynos-open-source-macos-with-same-bsd-pedigree/)

Building an Acoustic Radiometer
https://hackaday.com/2025/11/22/building-an-acoustic-radiometer/

A Crookes radiometer, despite what many explanations claim, does not work because of radiation pressure. When light strikes the vanes inside the near-vacuum chamber, it heats the vanes, which then …read more (https://hackaday.com/2025/11/22/building-an-acoustic-radiometer/)

DIY TENS Machine is a Pain-Relief PCB
https://hackaday.com/2025/11/22/diy-tens-machine-is-a-pain-relief-pcb/