If you’re an infrastructure dweeb, it’s hard to drive past an electrical substation and not appreciate the engineering involved in building something like that. A moment’s thought will also make …read more (https://hackaday.com/2021/11/14/hackaday-links-november-14-2021/)

Hexagonal Mirror Array Hides Hidden Message
https://hackaday.com/2021/11/14/hexagonal-mirror-array-hides-hidden-message/

[Ben Bartlett] recently got engaged, and the proposal had a unique bit of help in the form of a 3D-printed hexagonal mirror array, whose mirrors are angled just right to …read more (https://hackaday.com/2021/11/14/hexagonal-mirror-array-hides-hidden-message/)

Propel Paper Planes, Bisect Sausages With Electromagnets
https://hackaday.com/2021/11/14/propel-paper-planes-bisect-sausages-with-electromagnets/

Are you still launching paper airplanes using your hands? That’s like a baby’s toy! [Tom Stanton] and his homebrew electromagnetic rail launcher are sure to bring your paper airplane game into …read more (https://hackaday.com/2021/11/14/propel-paper-planes-bisect-sausages-with-electromagnets/)

Treasure Hunting with a Handful of Common Components
https://hackaday.com/2021/11/15/treasure-hunting-with-a-handful-of-common-components/

Sometimes simpler is better — when you don’t need the the computational power of an onboard microcontroller, it’s often best to rely on a simple circuit to get the job …read more (https://hackaday.com/2021/11/15/treasure-hunting-with-a-handful-of-common-components/)

Teensy MIDI Air Harp Sounds Huge
https://hackaday.com/2021/11/15/teensy-midi-air-harp-sounds-huge/

Some of the coolest sounds come from wild instruments like orchestra strings, fretless basses, and theremins — instruments that aren’t tied down by the constraints of frets and other kinds …read more (https://hackaday.com/2021/11/15/teensy-midi-air-harp-sounds-huge/)

Mining and Refining: Pure Silicon and the Incredible Effort It Takes to Get There
https://hackaday.com/2021/11/15/mining-and-refining-pure-silicon-and-the-incredible-effort-it-takes-to-get-there/

Were it not for the thin sheath of water and carbon-based life covering it, our home planet would perhaps be best known as the “Silicon World.” More than a quarter …read more (https://hackaday.com/2021/11/15/mining-and-refining-pure-silicon-and-the-incredible-effort-it-takes-to-get-there/)

Vacuum “Tube” Might Replace GPS One Day
https://hackaday.com/2021/11/15/vacuum-tube-might-replace-gps-one-day/

GPS and similar satellite navigation systems changed everything. The modern generation is far less likely to have had to fold a service station map or ask someone for directions on …read more (https://hackaday.com/2021/11/15/vacuum-tube-might-replace-gps-one-day/)