Driving an IN-9 with the ArduiNIX

[pcairic]

There is a slight problem with driving an IN-9 with the Arduinix :

- first, the voltage is too high (I am using IN-8 in a mulitplexed fashion as per their datasheet that states 200V, 10%, 1 to 2ms spikes).
- second, all the PWM ports are taken by the ArduiNIX.
- third, even if you could connect a PWM port, the PWM frequency is too low for the IN-9 to function properly.

After browsing the web, and discarding solutions that involved the use of a DAC, I came up with my own simple solution though.

Here is the schematic:

  +200V +
        |
        Z
        Z  8.8Kohms/1W (see note)
        Z
        |
       (˚) IN-9
        T
        |
        + collector
        \|__________+____ base (PWM, port 10)
        /| MPSA42   |
        | emitter   |
        |          === 10

[nonentity]

Oh man, that's sweet!

Love the video, I have always wondered how we'd get a nixie bargraph driven through the ArduiNIX.  Way to go!

If you like, I'll post the vid or some pics on the ArduiNIX site.

Great job!

[pcairic]

Sure, you can take the link from youtube, or I can also send you the original.