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/