One of the people behind the #Tangara MP3 player project ( npub13xrafncpm54aq499ad2ajpratuul63xtdmdqz28ttxmmtu9jtwcqdz9xu5 (npub13xr…9xu5)) has posted the first of a series of technical updates about its design, focussing on the touchwheel. In short, after evaluating a few premade models, they designed their own as a circular capacitative trackpad: https://www.crowdsupply.com/cool-tech-zone/tangara/updates/a-deep-dive-into-the-design-of-our-touchwheel