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/)

DJ Jackalope Live Set will Close Out Hackaday Remoticon
https://hackaday.com/2021/11/15/dj-jackalope-live-set-will-close-out-hackaday-remoticon/

Remoticon is almost here, but by Saturday night it’ll be gone! The best sendoff we can think of is with a party, and DJ Jackalope is playing a live set …read more (https://hackaday.com/2021/11/15/dj-jackalope-live-set-will-close-out-hackaday-remoticon/)

Circuit Sculpture Lamp is a Colorful Cube Companion
https://hackaday.com/2021/11/15/circuit-sculpture-lamp-is-a-colorful-cube-companion/

Circuit sculpture is engineering and art all at play together. One must combine the functional with the aesthetically appealing. [EdwardA61] did just that with this enchanting lamp build. Like many …read more (https://hackaday.com/2021/11/15/circuit-sculpture-lamp-is-a-colorful-cube-companion/)

Extending an E-Bike Range from Good to Wheelie Good
https://hackaday.com/2021/11/15/extending-an-e-bike-range-from-good-to-wheelie-good/