For most of history, the world got along fine without the rare earth elements. We knew they existed, we knew they weren’t really all that rare, and we really didn’t …read more (https://hackaday.com/2025/03/19/from-the-ashes-coal-ash-may-offer-rich-source-of-rare-earth-elements/)

Modern Computing’s Roots or The Manchester Baby
https://hackaday.com/2025/03/19/modern-computings-roots-or-the-manchester-baby/

In the heart of Manchester, UK, a groundbreaking event took place in 1948: the first modern computer, known as the Manchester Baby, ran its very first program. The Baby’s ability …read more (https://hackaday.com/2025/03/19/modern-computings-roots-or-the-manchester-baby/)

Pick Up A Pebble Again
https://hackaday.com/2025/03/19/pick-up-a-pebble-again/

A decade ago, smartwatches were an unexplored avenue full of exotic promise. There were bleeding-edge and eye-wateringly expensive platforms from the likes of Samsung or Apple, but for the more …read more (https://hackaday.com/2025/03/19/pick-up-a-pebble-again/)

World’s Smallest Blinky, Now Even Smaller
https://hackaday.com/2025/03/19/worlds-smallest-blinky-now-even-smaller/

Here at Hackaday, it’s a pretty safe bet that putting “World’s smallest” in the title of an article will instantly attract comments claiming that someone else built a far smaller …read more (https://hackaday.com/2025/03/19/worlds-smallest-blinky-now-even-smaller/)

PiEEG Kit is a Self-Contained Biosignal Labratory
https://hackaday.com/2025/03/20/pieeg-kit-is-a-self-contained-biosignal-labratory/

Back in 2023, we first brought you word of the PiEEG: a low-cost Raspberry Pi based device designed for detecting and analyzing electroencephalogram (EEG) and other biosignals for the purposes …read more (https://hackaday.com/2025/03/20/pieeg-kit-is-a-self-contained-biosignal-labratory/)

Chemistry Meets Mechatronics in This Engaging Art Piece
https://hackaday.com/2025/03/20/chemistry-meets-mechatronics-in-this-engaging-art-piece/

There’s a classic grade school science experiment that involves extracting juice from red cabbage leaves and using it as a pH indicator. It relies on anthocyanins, pigmented compounds that give …read more (https://hackaday.com/2025/03/20/chemistry-meets-mechatronics-in-this-engaging-art-piece/)

Linux Fu: A Warp Speed Prompt
https://hackaday.com/2025/03/20/linux-fu-a-warp-speed-prompt/

If you spend a lot of time at the command line, you probably have either a very basic prompt or a complex, information-dense prompt. If you are in the former …read more (https://hackaday.com/2025/03/20/linux-fu-a-warp-speed-prompt/)

Three SPI Busses Are One Too Many on This Cheap Yellow Display
https://hackaday.com/2025/03/20/three-spi-busses-are-one-too-many-on-this-cheap-yellow-display/

The Cheap Yellow Display may not be the fastest of ESP32 boards with its older model chip and 4 MB of memory, but its low price and useful array of …read more (https://hackaday.com/2025/03/20/three-spi-busses-are-one-too-many-on-this-cheap-yellow-display/)

Laser Harp Sets the Tone
https://hackaday.com/2025/03/20/laser-harp-sets-the-tone/