Displaying notes live as they are being played can be a really powerful learning tool, but it’s usually used to learn how to play a specific instrument. This take on …read more (https://hackaday.com/2021/11/26/spiral-music-visualization/)

PiGlass v2 Embraces the New Raspberry Pi Zero 2
https://hackaday.com/2021/11/27/piglass-v2-embraces-the-new-raspberry-pi-zero-2/

Well, that certainly didn’t take long. It’s been just about a month since the Raspberry Pi Zero 2 hit the market, and we’re already seeing folks revisit old projects to …read more (https://hackaday.com/2021/11/27/piglass-v2-embraces-the-new-raspberry-pi-zero-2/)

Indoor Blimp Sails Through The Air Using Ultrasonic Transducers
https://hackaday.com/2021/11/27/indoor-blimp-sails-through-the-air-using-ultrasonic-transducers/

https://www.youtube.com/watch?v=76rDC7VWiQU
" data-image-caption="" data-medium-file="https://hackaday.com/wp-content/uploads/2021/11/Snap-2021-11-24-at-18.25.59.png?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2021/11/Snap-2021-11-24-at-18.25.59.png?w=800">Quadcopter type drones can be flown indoors, but unless you have a lot of space, it usually just ends in a crash. The prospect of being hit in the face …read more (https://hackaday.com/2021/11/27/indoor-blimp-sails-through-the-air-using-ultrasonic-transducers/)

Perovskites Understood
https://hackaday.com/2021/11/27/perovskites-understood/

The usual solar cell is made of silicon. The better cells use the crystalline form of the element, but there are other methods to obtain electric energy from the sun …read more (https://hackaday.com/2021/11/27/perovskites-understood/)

Ham Radio Gets Brain Transplant
https://hackaday.com/2021/11/27/ham-radio-gets-brain-transplant/

Old radios didn’t have much in the way of smarts. But as digital synthesis became more common, radios often had as much digital electronics in them as RF circuits. The …read more (https://hackaday.com/2021/11/27/ham-radio-gets-brain-transplant/)

Want Octoprint But Lack a Raspberry Pi? Use an Old Android Phone
https://hackaday.com/2021/11/27/want-octoprint-but-lack-a-raspberry-pi-use-an-old-android-phone/

3D printers and Octoprint have a long history together, and pre-built images for the Raspberry Pi make getting up and running pretty easy. But there’s also another easy way to …read more (https://hackaday.com/2021/11/27/want-octoprint-but-lack-a-raspberry-pi-use-an-old-android-phone/)

Magnus Effect Propels This Flettner Rotor Boat
https://hackaday.com/2021/11/27/magnus-effect-propels-this-flettner-rotor-boat/

The Magnus effect is a interesting and useful phenomena. [James Whomsley] from [Project Air] decided to put it to work on a small radio-controlled boat, successfully harnessing the effect. (Video, …read more (https://hackaday.com/2021/11/27/magnus-effect-propels-this-flettner-rotor-boat/)