As more and more of the technology that we paid for turns becomes a subscription, there’s slowly been a momentum shift in the open source world of building replacements for …read more (https://hackaday.com/2026/07/21/open-source-vacuum-avoids-cloud/)

A Smarter DIY Air Filter
https://hackaday.com/2026/07/21/a-smarter-diy-air-filter/

As predominantly indoor creatures, it’s important to maintain a healthy habitat for the hacker. [Kishan Pratap Singh] designed a clever solution in AirSense, an ESP32-powered air filter. If you’re thinking …read more (https://hackaday.com/2026/07/21/a-smarter-diy-air-filter/)

60 FPS NES Emulator on ESP32
https://hackaday.com/2026/07/22/60-fps-nes-emulator-on-esp32/

At least in theory, video games are more resistant to becoming lost media thanks to their digital nature — they’re easy to copy and emulators have saved many titles that …read more (https://hackaday.com/2026/07/22/60-fps-nes-emulator-on-esp32/)

Old TV Vacuum Tube Turned DIY X-Ray Machine
https://hackaday.com/2026/07/22/old-tv-vacuum-tube-turned-diy-x-ray-machine/

Just because you probably shouldn’t make a DIY X-ray machine, doesn’t mean nobody would. [mircemk] shows off his DIY unit, how it works, how to use it safely and of …read more (https://hackaday.com/2026/07/22/old-tv-vacuum-tube-turned-diy-x-ray-machine/)

Compile Here, Run Everywhere: Crosstool-Ng
https://hackaday.com/2026/07/22/compile-here-run-everywhere-crosstool-ng/

In a recent post, I mentioned that I wanted to build some tools for a stripped-down Linux running on a 3D printer with a MIPS CPU. I had two options: …read more (https://hackaday.com/2026/07/22/compile-here-run-everywhere-crosstool-ng/)

Dress Up Your YubiKey With This Web-Based Tool
https://hackaday.com/2026/07/22/dress-up-your-yubikey-with-this-web-based-tool/

The combination of hardware required to make use of this project is specific enough that we imagine only a relatively limited number of readers will actually be able to try …read more (https://hackaday.com/2026/07/22/dress-up-your-yubikey-with-this-web-based-tool/)

The Need for Speed: Internet Speed Measurement (or DIY?)
https://hackaday.com/2026/07/22/the-need-for-speed-internet-speed-measurement-or-diy/

Car enthusiasts want to know how quickly they can make a quarter mile. Weightlifters are forever trying to add one more plate to the bar. Internet denizens have their own …read more (https://hackaday.com/2026/07/22/the-need-for-speed-internet-speed-measurement-or-diy/)

FLOSS Weekly Episode 876: There Is No Money Fairy
https://hackaday.com/2026/07/22/floss-weekly-episode-876-there-is-no-money-fairy/