[steven2992]

I have a pair of these tubes: XN12

To make them work I assume I must apply 170 volts to pin 11. Not shure wether that is ac or dc. and connect the corresponding pin to ground to make a certain number light up?

Am I correct? Am I on the road to destruction?
Thanks for your help.

 

[steven2992]

Bump

 

[jnewman]

I have never used nixie tubes, so take this with a grain of salt, but every tube I have ever used takes a DC power supply. Given that pin 11 is labeled "anode" (i.e., takes a positive voltage) I would assume those ones take DC also.

I don't know if the number pins should be connected to ground or what or if any biasing is necessary.

 

[DKJones96]

It's DC. All you do is supply 170v to the Anode and ground the number you wish to display and just float the others. I work with Nixie tubes a lot because I like the way they look.

Couldn't hurt to run the ground through a 1k resistor. Some Nixies are more sensitive to that than others but none of them will die within a few thousand hours without it.

 

[n1ist]

Nixies, like other gas discharge devices have a negative resistance curve. You must have a series resistor between the anode and B+. There's a calculator at
Nixie Tube Anode Resistor Calculator to figure it out.

There are tons of schematics out there for nixie clocks.
/mike

 

[steven2992]

thanks for the help