Hi Pierre, did you see any light at all from the tube? You may be
OK.....see Paolo's astute observation from his email.

Do you have a multimeter? Have you checked that you have 170V DC (or
thereabouts) coming from the little power supply?

Note, that the IN-1 tubes have a notoriously short life-span.....

Best,

Nick

On Tue, Mar 2, 2021 at 10:53 AM Pierre-Yves Clerson <
[email protected]> wrote:

> Hi Nick,
>
> Thank you for your quick reply.
>
> Is that mean I destroyed the cathodes while testing the tubes?
>
> Pierre
>
> Le 2 mars 2021 à 10:10, Nicholas Stock <[email protected]> a écrit :
>
> Pierre, you'll need a resistor in line with the anode otherwise you'll fry
> the cathode. Try 10K or so to test the tube. Do you know that you have 170V
> on the output of the supply? That tube looks like an IN-1.
>
> Welcome aboard!
>
> Nick
>
> Sent from my iPhone
>
> On Mar 2, 2021, at 07:03, Pierre-Yves Clerson <[email protected]>
> wrote:
>
> 
> Hi,
>
> I'm new to the Nixie world and I'm trying to setup what's explained here:
> https://www.instructables.com/How-to-Control-a-Nixie-Tube-with-an-Arduino/
>
> I fail right at the begining, being unable to test the Nixies. I have 4
> model 7977, it doesn't work with any. I have the 12vdc Power Supply, the
> 12vdc to 180vdc converter, and I connect the anode to the ground.
>
> You can see my setup on the attached pict.
>
> Any help would be truly appreciated.
>
> Many thx!
>
> <IMG_4072.jpg>
>
>
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