A new kind of ‘camera’ is poking at the invisible world of the human body – and it’s made from the same weird crystals that once shook up solar energy. …read more (https://hackaday.com/2025/09/16/perovskite-solar-cell-crystals-see-the-invisible/)

Reviewing Deluxe Paint, 40 Years On
https://hackaday.com/2025/09/16/reviewing-deluxe-paint-40-years-on/

When Deluxe Paint came out with the original Amiga in 1985, it was the killer app for the platform. [Christopher Drum] starts his recent article on just that note, remembering …read more (https://hackaday.com/2025/09/16/reviewing-deluxe-paint-40-years-on/)

The Practicality Of Solar Powered Meshtastic
https://hackaday.com/2025/09/17/the-practicality-of-solar-powered-meshtastic/

A Meshtastic node has been one of the toys of the moment over the last year, and since they are popular with radio amateurs there’s a chance you’ll already live …read more (https://hackaday.com/2025/09/17/the-practicality-of-solar-powered-meshtastic/)

Oil-Based Sprengel Pump Really Sucks
https://hackaday.com/2025/09/17/oil-based-sprengel-pump-really-sucks/

Have you heard of the Sprengel pump? It’s how they drew hard vacuum back before mechanical pumps were perfected — the first light bulbs had their vacuums drawn with Sprengel …read more (https://hackaday.com/2025/09/17/oil-based-sprengel-pump-really-sucks/)

Naturally Radioactive Food and Safe Food Radiation Levels
https://hackaday.com/2025/09/17/naturally-radioactive-food-and-safe-food-radiation-levels/

There was a recent recall of so-called ‘radioactive shrimp’ that were potentially contaminated with cesium-137 (Cs-137). But contamination isn’t an all-or-nothing affair, so you might wonder exactly how hot the …read more (https://hackaday.com/2025/09/17/naturally-radioactive-food-and-safe-food-radiation-levels/)

American Science and Surplus Ends Online Sales
https://hackaday.com/2025/09/17/american-science-and-surplus-ends-online-sales/

For nearly 90 years, American Science and Surplus has been shipping out weird and wonderful stuff to customers far and wide. In the pre-Internet days, getting their latest catalog in …read more (https://hackaday.com/2025/09/17/american-science-and-surplus-ends-online-sales/)

Forgotten Internet: The Story of Email
https://hackaday.com/2025/09/17/forgotten-internet-the-story-of-email/

It is a common occurrence in old movies: Our hero checks in at a hotel in some exotic locale, and the desk clerk says, “Ah, Mr. Barker, there’s a letter …read more (https://hackaday.com/2025/09/17/forgotten-internet-the-story-of-email/)

FLOSS Weekly Episode 847: This is Networking
https://hackaday.com/2025/09/17/floss-weekly-episode-847-this-is-networking/