Running a Nixie Tube off USB with a softwaredefined flyback power supply running on the CH32V003 RISCV microcontroller.
Console Font: https://audiolink.dev/
Patreon: / cnlohr
ch32v003: https://github.com/cnlohr/ch32v003fun
cnixxi: https://github.com/cnlohr/cnixxi (Look in the firmware and nixitest1 folders)