Tech in Plain Sight: Pneumatic Tubes
https://hackaday.com/2025/11/17/tech-in-plain-sight-pneumatic-tubes/

Today, if you can find a pneumatic tube system at all, it is likely at a bank drive-through. A conversation in the Hackaday bunker revealed something a bit surprising. Apparently, …read more (https://hackaday.com/2025/11/17/tech-in-plain-sight-pneumatic-tubes/)

Watching Radioactive Decay with a Homemade Spinthariscope
https://hackaday.com/2025/11/17/watching-radioactive-decay-with-a-homemade-spinthariscope/

Among the many science toys that have fallen out of fashion since we started getting nervous around things like mercury, chlorinated hydrocarbons, and radiation is the spinthariscope, which let people …read more (https://hackaday.com/2025/11/17/watching-radioactive-decay-with-a-homemade-spinthariscope/)

Keebin’ with Kristina: the One with the Cipher-Capable Typewriter
https://hackaday.com/2025/11/17/keebin-with-kristina-the-one-with-the-cipher-capable-typewriter/

I must confess that my mouth froze in an O when I saw [Jeff]’s Typeframe PX-88 Portable Computing System, and I continue to stare in slack-jawed wonder as I find …read more (https://hackaday.com/2025/11/17/keebin-with-kristina-the-one-with-the-cipher-capable-typewriter/)

Meet The Shape That Cannot Pass Through Itself
https://hackaday.com/2025/11/17/meet-the-shape-that-cannot-pass-through-itself/

Can a shape pass through itself? That is to say, if one had two identical solids, would it be possible to orient one such that a hole could be cut …read more (https://hackaday.com/2025/11/17/meet-the-shape-that-cannot-pass-through-itself/)

Building A Smart Speaker Outside The Corporate Cloud
https://hackaday.com/2025/11/17/building-a-smart-speaker-outside-the-corporate-cloud/

If you’re not worried about corporate surveillance bots scraping your shopping list and manipulating you through marketing, you can buy any number of off-the-shelf smart speakers for your home. Alternatively, …read more (https://hackaday.com/2025/11/17/building-a-smart-speaker-outside-the-corporate-cloud/)