opening
the firefly conductor: a VFD controller
salvaged cash register VFD and 32-bit micro-controller
how VFD work
HV518 VFD driver
how to control the HV518 VFD driver
figuring out pinout of VFD driver
lighting up all segments
lighting up individual segments
two part VFD
broken auxilary VFD
testing auxilary VFD
removing vacuum from VFD
software refresh
using higher voltage
final VFD controller
closing