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/

Transcutaneous Electrical Nerve Stimulation (TENS) is one of those things that sounds like it must be woo when you first hear of it. “A trickle of current that can deal …read more (https://hackaday.com/2025/11/22/diy-tens-machine-is-a-pain-relief-pcb/)

Assistive Radio Tells You What You Can’t See
https://hackaday.com/2025/11/22/assistive-radio-tells-you-what-you-cant-see/

We think of radios as audio devices, but for people who are visually impaired, it can be difficult to tell which channel you are listening to at any given time. …read more (https://hackaday.com/2025/11/22/assistive-radio-tells-you-what-you-cant-see/)

DIY Polyphonic Synth Sings in 8-Part Harmony
https://hackaday.com/2025/11/22/diy-polyphonic-synth-sings-in-8-part-harmony/