In a curious historical twist, the “Twelve days of Christmas” are actually the days of revelry that followed the 25th. The preceding period, Advent, was traditionally a fast, not unlike …read more (https://hackaday.com/2025/12/25/twelve-days-of-christmas-as-performed-by-1980s-speech-chip/)

Born to Burn: the Battle Born LFP Battery
https://hackaday.com/2025/12/25/born-to-burn-the-battle-born-lfp-battery/

Would you feel confident in buying US-made LiFePO4 (LFP) batteries? While the answer here is generally expected to be ‘yes’, especially compared to getting an unbranded LFP battery off eBay …read more (https://hackaday.com/2025/12/25/born-to-burn-the-battle-born-lfp-battery/)

MQTT Pager Build is Bringing Beepers Back
https://hackaday.com/2025/12/25/mqtt-pager-build-is-bringing-beepers-back/

Pagers were once a great way to get a message to someone out in public; they just had to be cool enough to have one. These days, they’re mostly the …read more (https://hackaday.com/2025/12/25/mqtt-pager-build-is-bringing-beepers-back/)

FibreSeeker 3: Continuous Carbon Fiber vs Chopped CF
https://hackaday.com/2025/12/25/fibreseeker-3-continuous-carbon-fiber-vs-chopped-cf/

Although you can purchase many types of FDM filaments containing ‘carbon fiber’ these days, they are in no way related to the carbon fiber (CF) composite materials used for rocket …read more (https://hackaday.com/2025/12/25/fibreseeker-3-continuous-carbon-fiber-vs-chopped-cf/)

Redneck Spaceship From Trash
https://hackaday.com/2025/12/25/redneck-spaceship-from-trash/

Facebook Marketplace provides you with a free grain silo, so what do you do with it? If you are [saveifforparts], you mix it with other materials and produce a retro-style …read more (https://hackaday.com/2025/12/25/redneck-spaceship-from-trash/)

Treating Functions as Vectors in Hilbert Space
https://hackaday.com/2025/12/25/treating-functions-as-vectors-in-hilbert-space/

Perhaps the most beautiful aspect of mathematics is that it applies to literally everything, even things that do not exist in this Universe. In addition to this there are a …read more (https://hackaday.com/2025/12/25/treating-functions-as-vectors-in-hilbert-space/)

Cookie Launcher Makes You Catch Your Own Snack
https://hackaday.com/2025/12/25/cookie-launcher-makes-you-catch-your-own-snack/

Holiday cookies are a joy, and to make things a bit more fun, [The Skjegg] created the Cookie Launcher. At the touch of a button, a door opens and the …read more (https://hackaday.com/2025/12/25/cookie-launcher-makes-you-catch-your-own-snack/)

PC Watercooling Uses Everything But CNC Machining
https://hackaday.com/2025/12/26/pc-watercooling-uses-everything-but-cnc-machining/