Some cats are what you might call indoor cats, happy to stretch out in the lap of indoor luxury and never bother themselves with the inclement outdoors again. Others however …read more (https://hackaday.com/2025/05/30/2025-pet-hacks-contest-keep-the-prey-at-bay-with-the-cat-valve/)

Tidy LED Matrix Displays GIFs On Demand
https://hackaday.com/2025/05/30/tidy-led-matrix-displays-gifs-on-demand/

When it comes to LED matrixes, building one is just the first step. Then you have to decide what to display on it. [panjanek] came up with a relatively flexible …read more (https://hackaday.com/2025/05/30/tidy-led-matrix-displays-gifs-on-demand/)

You Wouldn’t Download A Skateboard?
https://hackaday.com/2025/05/30/you-wouldnt-download-a-skateboard/

At the end of the day, a skateboard boils down to a plank of wood with some wheels. They are wonderfully simple and fun and cheap modes of transportation. But …read more (https://hackaday.com/2025/05/30/you-wouldnt-download-a-skateboard/)

White LED Turning Purple: Analyzing a Phosphor Failure
https://hackaday.com/2025/05/30/white-led-turning-purple-analyzing-a-phosphor-failure/

White LED bulbs are commonplace in households by now, mostly due to their low power usage and high reliability. Crank up the light output enough and you do however get …read more (https://hackaday.com/2025/05/30/white-led-turning-purple-analyzing-a-phosphor-failure/)

17 Year Old Hellboy II Prop Still Amazes
https://hackaday.com/2025/05/30/17-year-old-hellboy-ii-prop-still-amazes/

The AI effects we know these days were once preceded by CGI, and those were once preceded by true hand-built physical props. If that makes you think of Muppets, this …read more (https://hackaday.com/2025/05/30/17-year-old-hellboy-ii-prop-still-amazes/)

Making a Treadmill Into a 3D Printer
https://hackaday.com/2025/05/31/making-a-treadmill-into-a-3d-printer/

A treadmill-style bed can be a great addition to a 3D printer. It allows prints to be shifted out of the build volume as printing continues, greatly increasing the size …read more (https://hackaday.com/2025/05/31/making-a-treadmill-into-a-3d-printer/)

A CRT Display for Retro Weather Forecasting
https://hackaday.com/2025/05/31/a-crt-display-for-retro-weather-forecasting/

It would be hard to find any electronics still in production which use CRT displays, but for some inscrutable reason it’s easy to find cheap 4-inch CRTs on AliExpress. Not …read more (https://hackaday.com/2025/05/31/a-crt-display-for-retro-weather-forecasting/)