Multiplexing Nixies

dwight elvey dkelvey at hotmail.com
Mon Mar 5 23:34:19 CST 2007


>From: Jules Richardson <julesrichardsonuk at yahoo.co.uk>
>
>
>Does anyone know if multiplexing Nixies will significantly reduce their 
>lifespan? Or does it in fact help versus "permanently on as needed"?
>
---snip---
Hi
It is not a good idea to multiplex Nixies. They don't always strike
exactly when the voltage is applied. This means you can't go too
fast. Also, if the current is too high ( not just the average ), it
causes the gas to heat up too much and it changes the ionization.
This causes a more distructive violet glow that will eventually
cause the bulb to get contaminated by blasting the electrodes.
Unlike LED's, running them at too low a current doesn't just
make them glow less brightly, it tends to make them glow only
over part of the electrode.
Most applications use one driver per Nixie.
Dwight

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