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NIXIE watch as a home decoration :)

emil134679 2640 11
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  • Hello forum users,
    I present the finished design of a watch based on IN-1 + INS-1 tubes

    NIXIE watch as a home decoration :)

    The project assumed the greatest possible compactness of the control electronics while using the most common elements.

    So I decided on a surface mount project, using the DS3231 as a real time clock, the watch code is contained in the ATmega328 present on the PCB as an integrated Arduino UNO, hence the presence of the CH340G on board and the possibility of programming at any time via the USB C port, which also serves as power.
    The tubes are controlled by two multiplexing 74HC595 registers connected to MMBTA42 and MMBTA92 transistors.
    The 170 V boost converter is a ready-made system purchased from our friends from the east.
    On the board, in the possible need for development, there are 3 free Arduino ports that can be used as inputs/outputs (buttons, alarm clock buzzer, etc.)
    The colon, of course, serves as the second hand.
    NIXIE watch as a home decoration :) NIXIE watch as a home decoration :)
    The shape of the printed circuit board was created with the intention of making a watch case, but the woodwork is still ahead of me. :)

    What do you think? I'm interested in your opinions. :)

    Cool? Ranking DIY
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    About Author
    emil134679
    Level 13  
    Offline 
    emil134679 wrote 155 posts with rating 85. Been with us since 2010 year.
  • #2
    excray
    Level 40  
    Those lamps that make for colons, what markings do they have/where did you buy them?
  • #3
    emil134679
    Level 13  
    INS-1, where you get it, you buy it there, I used to buy tubes a long time ago.
  • #4
    vodiczka
    Level 43  
    emil134679 wrote:
    What do you think? I'm interested in your opinions.

    The project was successful, but since it will be in a wooden housing, compactness was probably not that important.
    Personally, I would choose a clock on vertical lamps, similar to this one, but with an enclosed bottom. link
  • #5
    madart
    Level 26  
    Such a pretty tile that it's a shame to hide it. :)
    How is the time set? Because it's the only inconvenience when we still have the summer/winter time change. DS3231 has a very small deviation. I have two of these and they have been shining for 14 years.
  • #6
    vodiczka
    Level 43  
    madart wrote:
    Such a pretty tile that it's a shame to hide it.

    That's right, you can make a transparent casing or (if the heat exchange allows) pour a transparent resin.
  • #7
    kris8888
    Level 38  
    madart wrote:
    I have two of these and they have been shining for 14 years

    No lamp replacement? The technical data indicate that the guaranteed lifetime for the IN-1 is only 1000 h.
  • #8
    madart
    Level 26  
    One has LC-516 link . I changed the tubes a few times so that the cathodes would detoxify and once two transistors died together with the CD4028
    The advantage of the multiplex is that the lamps do not burn all the time, only about 1/6 of the time for 6 lamps, and I think it extends their life a bit.
    The second one from 2009 is probably on the Z560M, the converter from 555 to the factory Chinese one was replaced after 9 years
    NIXIE watch as a home decoration :)
  • #9
    emil134679
    Level 13  
    vodiczka wrote:
    emil134679 wrote:
    What do you think? I'm interested in your opinions

    The project was successful, but since it will be in a wooden housing, compactness was probably not that important.
    Personally, I would choose a clock on vertical lamps, similar to this one, but with an enclosed bottom. link

    It was important because the housing is neither deep nor wide, more or less I see it as if you wrapped the presented circuit around, leaving the tube lenses outside the housing. The colleague above showed something similar and I'm going in that direction, but I still want to reduce it.
    Vertical lamps are not my taste at all, but everyone has their own taste ;)

    madart wrote:
    Such a pretty tile that it's a shame to hide it. :)
    How is the time set? Because it's the only inconvenience when we still have the summer/winter time change. DS3231 has a very small deviation. I have two of these and they have been shining for 14 years.

    PCB as PCB, the Chinese from JBC did a good job ;)
    I update the RTC if necessary by simply uploading the code.
    The watch is still able to work with the Arduino IDE via USB.
    Reports as UNO.
    And I bought a nice USB C socket with a nut for the housing on a short cable.
    I will make a round hole and install. I use the same socket to power the entire system and program it.

    I have 3 free I/O released on goldpins, so you could add some "+" "-" and "ok" to the code to set it manually.
    It's still a long way to October. Connecting the watch to the computer for 10 seconds is nothing terrible. That was my assumption.

    vodiczka wrote:
    madart wrote:
    Such a pretty tile that it's a shame to hide it

    That's right, you can make a transparent casing or (if the heat exchange allows) pour a transparent resin.

    Transparent would be nice, but it won't match anything on my desk.
    Flooding is not an option, because just like the whole thing does not heat up at all, the step-up already emits something there. I wouldn't want to risk it.
  • #10
    vodiczka
    Level 43  
    emil134679 wrote:
    Vertical lamps are not my taste at all, but everyone has their own taste

    My taste is probably due to the fact that I first had contact with displays on vertical lamps and I remained faithful to them.
  • #11
    chemik_16
    Level 25  
    Do you have any experience with a high voltage converter controlled directly from the uC?
    At one time I wanted to make a simple PWM controlled one MOSFET transistor and a transformer from fluorescent lamps from the monitor and I don't know if it still makes sense. ;) At least controlling the brightness would be simple.
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