The author describes their journey in creating a tiny volumetric display. They initially had the idea to create a flickering candle-like effect using a persistence-of-vision display, but realized it would require too much supporting machinery. They then came up with the idea to create a spinning display with a small motor and battery. They used circuit boards, a microcontroller, and a rechargeable lithium-ion battery to build the prototype. The author also discusses their process of soldering components and creating a battery holder. They mention the use of enamel wire for connections and the appeal of the naked wires. The author demonstrates the functionality of the display and discusses potential improvements for future versions, such as adding a reference voltage for battery monitoring and designing a more convenient battery charger.
https://mitxela.com/projects/candle