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6 digit Numitron Clock

Discussion in 'Electronic Components' started by Sal Brisindi, Dec 23, 2003.

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  1. Sal Brisindi

    Sal Brisindi Guest

  2. Michael

    Michael Guest

    Very nice, sharp photos. Good depth of field and warm lighting.
    The walnut case for the Numitron clock is a winner.

    Now you've done it ..... I gotta scrounge around for the 7-seg. DIP
    incandescent displays I bought back in the early 70's and do something
    with 'em!
  3. Sal Brisindi

    Sal Brisindi Guest

    Thanks for the compliments. It was a fun project. Have fun building your
    clock, remember if you are going to multiplex the display, you need all of the
    diodes soldered to each segment, if you are going the direct drive route, you
    don't need them but will have a bunch more ic's.

    Happy Holidays,
  4. Elephant

    Elephant Guest

    All I can say is WOW! What a beautiful piece of work. The warm glow
    of the digits reminds me of the HeathKit clock that had the neon

    Quick question. The 5314 chip is hard to come by. Where did you get
    it? Where can it be purchased? Also, where does one by the display
  5. Sal Brisindi

    Sal Brisindi Guest

    Thanks for the compliment,
    The MM5314 is available for $19.99 at There is another supplier
    that sells it for $12.99 but I have to find that url. As far as the numitrons
    go, thats a tough call. There are a few tube vendors that sell them but at a
    high cost, I bought mine from ebay a few months ago. There are 10 on ebay
    right now but I think they are going for $13.00 a piece. If you need any info,
    let me know.

  6. Sal, I have some two and three digit Beckman seven segment displays.
    The three digit are SP-353, but I will have to check the part number on
    the two digit type when I get back out to my shop. These were used in
    gas pumps and pinball machines. I removed these from some National
    Semiconductor cash registers.
    2 days!

    Michael A. Terrell
    Central Florida
  7. Sal Brisindi

    Sal Brisindi Guest

    Hi Mike,
    I've seen the type of displays you are talking about, they glow like a neon nixie
    tube and require about 160 volts to light up more or less
    ( . The numitrons I used are incadescent
    and require 5 volts to light up. I just received 7 used numitrons in the mail today,
    4 are good, 3 are bad. The tubes I used in my clock were NOS. There is a guy on
    ebay selling a smaller version of the incadescent tubes for $5.00 a piece. I think
    he has 900 of them to sell. If anyone wants to know his email address I can dig it


  8. Michael

    Michael Guest

    Oh, my! No clock, thanks. I've got clocks falling off shelves all over
    the place. I'll probably turn the DIP incandescent displays into an
    indoor/outdoor thermometer for the bedroom. Which reminds me: I gotta a
    go find those things!
  9. Guest

    Damn! That's NICE!!!
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