I review cheap electronics, design things for my 3D printer, and build small apps — then keep it all in one place. Some of it might save you money. Some of it is just me thinking out loud.
I'm a hobbyist who has never been able to leave a working thing alone. Most of what's here started as a problem in my own workshop — a cheap part that misbehaved, a drawer that needed dividers, an app I wanted on my own phone — and turned into something worth writing down. If a review saves you a bad purchase, or a file saves you an afternoon of modelling, that's the whole point.