Hacked Gadgets Forum

September 2, 2009

Single Nixie Tube Clock

at 12:41 pm. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks

 

There is something very cool about clocks, you have constantly changing information that your design needs to represent. This Single Nixie Tube Clock is a very interesting clock design, it uses a low voltage plug in wall transformer and makes the high voltage needed for the clock on the circuit board. We have seen lots of cool tube clocks in the past and this one is sure to not be the last.

"With PIC microcontroller I used a "watch" crystal at 32,768kHz. It’s value is pretty cool and now we will see why. PIC16F84 has internal TMR0 counter that increments itself no matter what the PIC is doing at the moment. Think of it as a threaded sub-program. This counter can generate an interrupt when it’s value overflows from 255->0. We can also prescale this counter to slow it down a bit so we can make it generate an interrupt on every 2, 4, 8, 16, 32, 64, 128 or 256 overflows. So, when we finally connect our 32,768kHz crystal on PIC microcontroller, we should also know that the speed it runs at is divided by 4 and this characteristic is only found with PIC microcontrollers. This all means that our PIC runs at 8,192kHz which tells us that TMR0 will overflow 32 times per second. Now when we prescale it by 32 it means that it will overflow once per second and generate us an interrupt."


 

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7 Responses to “Single Nixie Tube Clock”

  1. Maigo Says:

    nixie tubes are always just so awesome

  2. UDS Says:

    There is one of these at my uni, i go past it just about every day, it sits on the window sill of one of the offices.

    Never has the right time though <_<.

  3. Muris Says:

    Hi,
    Well this one is pretty accurate. It runs late for +1 second every two days. :-)

  4. Single Tube Nixie Clock - Hack a Day Says:

    [...] [via Hacked Gadgets] [...]

  5. Single Tube Nixie Clock | Diy all the Way Says:

    [...] [via Hacked Gadgets] [...]

  6. Single Tube Nixie Clock | Technology & Lifestyle Tech News Says:

    [...] IN-8 Single Nixie Tube Clock [via Hacked Gadgets] [...]

  7. Muris Says:

    It is officially running late just 1 minute since 26-08-2009, and now it is 12-09-2009 :)

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