In general, military gear is designed to be rugged and reliable. A side effect of this is that the equipment usually has a distinct visual look that many people find …read more (https://hackaday.com/2024/12/28/building-a-3d-printed-phone-handset-with-mil-spec-style/)

A Low-Cost Spectrometer Uses Discrete LEDs and Math
https://hackaday.com/2024/12/28/a-low-cost-spectrometer-uses-discrete-leds-and-math/

A spectrometer is a pretty common lab instrument, useful for determining the absorbance of a sample across a spectrum of light. The standard design is simple; a prism or diffraction …read more (https://hackaday.com/2024/12/28/a-low-cost-spectrometer-uses-discrete-leds-and-math/)

Let it Snow with a sub $100 snowmaking machine.
https://hackaday.com/2024/12/28/let-it-snow-with-a-sub-100-snowmaking-machine/

[Mattmopar] figured out how to get a white Christmas even if the weather isn’t frightful. He built a simple DIY snow making machine with a few plumbing parts, and tools …read more (https://hackaday.com/2024/12/28/let-it-snow-with-a-sub-100-snowmaking-machine/)

Circuit Secrets: Exploring a $5 Emergency Light
https://hackaday.com/2024/12/28/circuit-secrets-exploring-a-5-dollar-emergency-light/

Who would’ve thought a cheap AliExpress emergency light could be packed with such crafty design choices? Found for about $5, this unit uses simple components yet achieves surprisingly sophisticated behaviors. …read more (https://hackaday.com/2024/12/28/circuit-secrets-exploring-a-5-dollar-emergency-light/)

38C3: Towards an Open WiFi MAC Stack on ESP32
https://hackaday.com/2024/12/28/38c3-towards-an-open-wifi-mac-stack-on-esp32/

At the 38th Chaos Communications Congress, [Frostie314159] and [Jasper Devreker] gave us a nice update on their project to write an open-source WiFi stack for the ESP32. If you’re interested …read more (https://hackaday.com/2024/12/28/38c3-towards-an-open-wifi-mac-stack-on-esp32/)

Full Color 3D Printing With PolyDye and Existing Inkjet Cartridges
https://hackaday.com/2024/12/28/full-color-3d-printing-with-polydye-and-existing-inkjet-cartridges/

Being able to 3D print FDM objects in more than one color is a feature that is rapidly rising in popularity, assisted by various multi-filament systems that allow the printer …read more (https://hackaday.com/2024/12/28/full-color-3d-printing-with-polydye-and-existing-inkjet-cartridges/)

Porting Dragon’s Lair to the Game Boy Color Was a Technical Triumph
https://hackaday.com/2024/12/28/porting-dragons-lair-to-the-game-boy-color-was-a-technical-triumph/

If you remember the 80s arcade game Dragon’s Lair, you probably also remember it was strikingly unlike anything else at the time. It didn’t look or play like anything else. …read more (https://hackaday.com/2024/12/28/porting-dragons-lair-to-the-game-boy-color-was-a-technical-triumph/)