2025 One-Hertz Challenge: Fixing The Clock That Once Synced The World
https://hackaday.com/2025/07/29/2025-one-hertz-challenge-fixing-the-clock-that-once-synced-the-world/

The HP 115BR is not one of the most well-known products from Hewlett-Packard. And yet, it was remarkably important nonetheless. This hardware once synced time around the world. Now, for …read more (https://hackaday.com/2025/07/29/2025-one-hertz-challenge-fixing-the-clock-that-once-synced-the-world/)

ATtiny-Powered Business Card Plays Cracktro Hits
https://hackaday.com/2025/07/29/attiny-powered-business-card-plays-cracktro-hits/

PCB business cards are a creative way to show your tech skills while getting your name out there. This take on a PCB business card, sent in by [VCC], tackles …read more (https://hackaday.com/2025/07/29/attiny-powered-business-card-plays-cracktro-hits/)

2025 One Hertz Challenge: Precise Time Ref via 1 Pulse-Per-Second GPS Signal
https://hackaday.com/2025/07/29/2025-one-hertz-challenge-precise-time-ref-via-1-pulse-per-second-gps-signal/

Our hacker [Wil Carver] has sent in his submission for the One Hertz Challenge: Precise Time Ref via 1 Pulse-Per-Second GPS Signal. This GPS Disciplined Oscillator (GPSDO) project uses a …read more (https://hackaday.com/2025/07/29/2025-one-hertz-challenge-precise-time-ref-via-1-pulse-per-second-gps-signal/)

Casting Meteorite-like Materials
https://hackaday.com/2025/07/29/casting-meteorite-like-materials/

From the outside, iron meteorites tend to look like formless, rusted lumps of metal, which is why museums often polish and etch sections to show their interior structure. This reveals …read more (https://hackaday.com/2025/07/29/casting-meteorite-like-materials/)

AVIF: The Avian Image Format
https://hackaday.com/2025/07/29/avif-the-avian-image-format/

Humans have long admired the sound of birdsong, but to fully appreciate how technically amazing it is, you need an ultrasonic microphone. [Benn Jordan] recently created a video about using …read more (https://hackaday.com/2025/07/29/avif-the-avian-image-format/)

A Dual-Screen Cyberdeck To Rule Them All
https://hackaday.com/2025/07/30/a-dual-screen-cyberdeck-to-rule-them-all/

We like cyberdecks here at Hackaday, and in our time we’ve brought you some pretty amazing builds. But perhaps now we’ve seen the ultimate of the genre, a cyberdeck so …read more (https://hackaday.com/2025/07/30/a-dual-screen-cyberdeck-to-rule-them-all/)

Everyone’s Invited to the Copyparty
https://hackaday.com/2025/07/30/everyones-invited-to-the-copyparty/