Engineers create 3D-printed robotic fish that swim, play and recharge themselves through automated charging systems. Here's all you need to know

Engineers have developed robotic fish that mimic real aquatic life, offering an aquarium experience without the upkeep. These miniature submarines, powered by Arduino and guided by an overhead camera ...
Hackaday

Building A Wireless Fingerprint Authorization Device

Once upon a time, there was a bit of a fad for fingerprint authentication in laptops and desktop computers. It has long since ...
New Atlas

Tank 5 is part rugged phone, part projector, part campsite toolbox

Rugged phones have developed a habit of turning into spec-sheet survival kits lately. Bigger batteries, brighter lights, ...

Track Room Occupancy Without Cameras Using ESP32 Wi-Fi Drops

Learn how to repurpose your spare ESP32 boards into cost-effective presence detection sensors using the Tommy Sense ...
Hackaday

DIY SI5351 Radio Tunes In SW, MW, And More

There are plenty of radios you can buy that pick up MW and SW bands if that’s what you’re into. Or, you can follow [mircemk]’s example, and whip one up yourself instead. The build employs an ESP32 as ...