Radio Repeaters In the Sky
https://hackaday.com/2025/04/30/radio-repeaters-in-the-sky/

One of the first things that an amateur radio operator is likely to do once receiving their license is grab a dual-band handheld and try to make contacts with a …read more (https://hackaday.com/2025/04/30/radio-repeaters-in-the-sky/)

Supercon 2024: Photonics/Optical Stack for Smart-Glasses
https://hackaday.com/2025/04/30/supercon-2024-photonics-optical-stack-for-smart-glasses/

Smart glasses are a complicated technology to work with. The smart part is usually straightforward enough—microprocessors and software are perfectly well understood and easy to integrate into even very compact …read more (https://hackaday.com/2025/04/30/supercon-2024-photonics-optical-stack-for-smart-glasses/)

FLOSS Weekly Episode 831: Let’s Have Lunch
https://hackaday.com/2025/04/30/floss-weekly-episode-831-lets-have-lunch/

This week, Jonathan Bennett and Dan Lynch chat with Peter van Dijk about PowerDNS! Is the problem always DNS? How did PowerDNS start? And just how big can PowerDNS scale? …read more (https://hackaday.com/2025/04/30/floss-weekly-episode-831-lets-have-lunch/)

Layout A PCB with Tscircuit
https://hackaday.com/2025/04/30/layout-a-pcb-with-tscircuit/

Most of us learned to design circuits with schematics. But if you get to a certain level of complexity, schematics are a pain. Modern designers — especially for digital circuits …read more (https://hackaday.com/2025/04/30/layout-a-pcb-with-tscircuit/)

A New And Weird Kind of Typewriter
https://hackaday.com/2025/04/30/a-new-and-weird-kind-of-typewriter/

Typewriters aren’t really made anymore in any major quantity, since the computer kind of rained all over its inky parade. That’s not to say you can’t build one yourself though, …read more (https://hackaday.com/2025/04/30/a-new-and-weird-kind-of-typewriter/)

Neutron Flux Impact on Quartz Expansion Rate
https://hackaday.com/2025/04/30/neutron-flux-impact-on-quartz-expansion-rate/

https://www.sciencedirect.com/science/article/pii/S0022311525000261
" data-image-caption="SEM-EDS images of the pristine (left) and the irradiated (right) MC sample. Intra- and inter-grain crack opening and void creation were confirmed in the irradiated MC samples. (Credit: I. Murayama et al, 2022)
" data-medium-file="https://hackaday.com/wp-content/uploads/2025/04/1-s2.0-S0022311525000261-gr11_lrg.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2025/04/1-s2.0-S0022311525000261-gr11_lrg.jpg?w=800">Radiation-induced volumetric expansion (RIVE) is a concern for any concrete structures that are exposed to neutron flux and other types of radiation that affect crystalline structures within the aggregate. For …read more (https://hackaday.com/2025/04/30/neutron-flux-impact-on-quartz-expansion-rate/)

Vintage Stereo Stack Becomes Neat PC Case
https://hackaday.com/2025/04/30/vintage-stereo-stack-becomes-neat-pc-case/

Vintage hi-fi gear has a look and feel all its own. [ThunderOwl] happened to be playing in this space, turning a heavily-modified Technics stereo stack into an awesome neo-retro PC …read more (https://hackaday.com/2025/04/30/vintage-stereo-stack-becomes-neat-pc-case/)