Mankind has been using water to mark the passage of time for thousands of years. From dripping stone pots in Ancient Egypt to the more mechanically-complicated Greco-Roman Clepsydrae, the history …read more (https://hackaday.com/2025/07/28/2025-one-hertz-challenge-drop-the-beat-but-only-at-60-bpm/)

Solar Light? Mains Light? Yes!
https://hackaday.com/2025/07/29/solar-light-mains-light-yes/

So you want a light that runs off solar power. But you don’t want it to go dark if your batteries discharge. The answer? A solar-mains hybrid lamp. You could …read more (https://hackaday.com/2025/07/29/solar-light-mains-light-yes/)

Tetris in a Single Line of Code
https://hackaday.com/2025/07/29/tetris-in-a-single-line-of-code/

PC gaming in the modern era has become a GPU measuring contest, but back when computers had far fewer resources, every sprite had to be accounted for. To many, this …read more (https://hackaday.com/2025/07/29/tetris-in-a-single-line-of-code/)

Power Line Patrols: The Grid’s Eye in the Sky
https://hackaday.com/2025/07/29/power-line-patrols-the-grids-eye-in-the-sky/

Those of us who like to monitor air traffic with ADS-B aggregators such as FlightAware and ADS-B Exchange tend to see some interesting flight paths. I’m not talking about the …read more (https://hackaday.com/2025/07/29/power-line-patrols-the-grids-eye-in-the-sky/)

Numbers Station Simulator, Right In Your Browser
https://hackaday.com/2025/07/29/numbers-station-simulator-right-in-your-browser/

Do you find an odd comfort in the uncanny, regular intonations of a Numbers Station? Then check out [edent]’s numbers station project, which leverages the browser’s speech synthesis engine to …read more (https://hackaday.com/2025/07/29/numbers-station-simulator-right-in-your-browser/)

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/