UPDATE ABOUT PLATE BRIGHTNESS WITH DC FILAMENT:


My description of why the brightness shifts across the length of the VFD is incorrect, though the brightness does indeed shift. I believe it actually shifts in the opposite direction, with the plates above the negative end being brighter and the plates above the positive end being dimmer.


However, this is not due to a temperature shift in the filament. Instead, at the ground side of the filament, the potential difference between the plate and the filament is at its greatest. However, at the positive side of the filament, the potential of the filament in relation to the plate is actually elevated above ground due to the resistance of the filament. This means that there are fewer electrons present that can be boiled off and results in dimmer plates.



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In this episode, we take a deep dive into Vacuum Fluorescent Displays (VFD) and try to figure out exactly how they work and what you can do with them. You can even do some stuff they weren’t designed for, like audio amplification!

Check out Dalibor Farny’s channel here:    / daliborfarny  
Check out TannerTech’s channel here:    / @tannertech  

VFD Picture 1:   / 885656792440729601  
VFD Picture 2: https://en.wikipedia.org/wiki/Vacuum_...

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