So, this is a pretty ingenious use of spare time. With a vacuum fluorescent display (VFD) from a VCR used as the amplifier, a crafty DIY-er was able to power a pair of headphones. We'll be honest, the ...

This gorgeous DIY IV-3 VFD clock is shared with full build files on GitHub. Uses IV-3 VFDs for a blue-green glow at ~30V - cheaper and lower-voltage than nixies. Complete repo includes schematics, ...