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Author Topic: Driving an IN-9 with the ArduiNIX  (Read 4618 times)
pcairic
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« on: January 30, 2010, 02:56:16 PM »

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
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nonentity
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« Reply #1 on: January 30, 2010, 03:09:28 PM »

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!
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nonentity
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pcairic
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« Reply #2 on: February 06, 2010, 08:45:22 PM »

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