We seldom talk about 3D printing lenses because most techniques can’t possibly produce transparent parts of optical quality. However, you can 3D print something like a lens, as [Luke Edwin] demonstrates, …read more (https://hackaday.com/2025/12/24/mesh-lens-lets-your-camera-make-weird-pixel-art/)

Printing With Metal on the Ender 3 Using Only a Friction Wheel
https://hackaday.com/2025/12/24/printing-with-metal-on-the-ender-3-using-only-a-friction-wheel/

Printing metal as easily as it is to printed with thermoplastics has been a dream for a very long time, with options for hobbyists being very scarce. This is something …read more (https://hackaday.com/2025/12/24/printing-with-metal-on-the-ender-3-using-only-a-friction-wheel/)

Building a High-Performance Shifter for Sim Racing
https://hackaday.com/2025/12/25/building-a-high-performance-shifter-for-sim-racing/

These days, sim racing is more realistic than ever. There are better screens, better headsets, and better steering wheels with better force-feedback, all of which help make you feel like …read more (https://hackaday.com/2025/12/25/building-a-high-performance-shifter-for-sim-racing/)

Twelve Days of Christmas as Performed By 1980s Speech Chip
https://hackaday.com/2025/12/25/twelve-days-of-christmas-as-performed-by-1980s-speech-chip/

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/