How to Grow a Giant Crystal from Copper Sulfate
https://hackaday.com/2026/10/05/how-to-grow-a-giant-crystal-from-copper-sulfate/

Copper sulfate crystals are probably among one of the prettiest crystals you can grow at home, with even just a simple setup with some copper scrap and vinegar already capable …read more (https://hackaday.com/2026/10/05/how-to-grow-a-giant-crystal-from-copper-sulfate/)

Ambition, Thy Name is a 3D Printed Transonic R/C Jet
https://hackaday.com/2026/10/05/ambition-thy-name-is-a-3d-printed-transonic-r-c-jet/

Building anything that flies from scratch is an ambitious undertaking, even if it’s ‘just’ radio-controlled. 3D printing the aircraft isn’t that odd these days, but putting a hot jet engine …read more (https://hackaday.com/2026/10/05/ambition-thy-name-is-a-3d-printed-transonic-r-c-jet/)

3D-Printed Filter Removes Most Microplastics From Water
https://hackaday.com/2026/10/05/3d-printed-filter-removes-most-microplastics-from-water/

With the rise of synthetic polymers in everywhere from clothing, packaging and beyond, we have also seen a corresponding rise in fragments of these polymers in the environment. These micro- …read more (https://hackaday.com/2026/10/05/3d-printed-filter-removes-most-microplastics-from-water/)

Two Microcontrollers Talking, All It Needs is an LED
https://hackaday.com/2026/10/05/two-microcontrollers-talking-all-it-needs-is-an-led/

There are some projects that seem at first sight to be easy, but anyone who tries them finds a whole heap of unexpected problems and turns to the off-the-shelf device. …read more (https://hackaday.com/2026/10/05/two-microcontrollers-talking-all-it-needs-is-an-led/)

A New Type of LLM on the Block: Decision-Making Models
https://hackaday.com/2026/10/06/a-new-type-of-llm-on-the-block-decision-making-models/

Large language models (LLMs) output language, but they are commonly tasked with making a decision or classification of some kind instead of writing an essay or chat reply. An LLM …read more (https://hackaday.com/2026/10/06/a-new-type-of-llm-on-the-block-decision-making-models/)

USB-C PD Tamed with this Analyzer
https://hackaday.com/2026/10/06/usb-c-pd-tamed-with-this-analyzer/

USB-C Power Delivery (PD) has been a boon to anyone working with low-voltage DC power, because at a stroke it replaces a vast array of wall warts, power supplies, and …read more (https://hackaday.com/2026/10/06/usb-c-pd-tamed-with-this-analyzer/)

Using LineageOS for Phones and DIY Smart TVs is Pretty Nifty
https://hackaday.com/2026/10/06/using-lineageos-for-phones-and-diy-smart-tvs-is-pretty-nifty/

Although Android is essentially just another Linux distribution, most people only experience it in the form of the rather restrictive and proprietary versions found on smartphones, tablets and smart TVs. …read more (https://hackaday.com/2026/10/06/using-lineageos-for-phones-and-diy-smart-tvs-is-pretty-nifty/)