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Very small displays, 7-segment and alphanumeric

Discussion in 'Electronic Components' started by Mads Aggerholm, Oct 30, 2012.

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  1. Good day everyone.

    I'm new to this forum, and english is not my native language, so if this is
    the wrong place to ask, please let me know.

    I've tried hard to find *very* small displays on the internet, but with no
    luck so far.
    I'm looking for displays containing only one digit, 7-segment and
    alphanumeric, and four, sperated by a colon two by two.
    The height should be not more than 4, max. 5 millimeters. My father had two
    of them once, so they must exist.

    If it is possible, different colors would be nice to have too.

    I need them to make a scoreboard for a race-track:
    Recently I made "The worlds smallest race track" (
    ) and now my next project is to
    make one that is even smaller!

    I hope you can help me on this one.

    Sincerely/Best regards
    Mads Aggerholm
     
  2. Jamie

    Jamie Guest

    Are you referring to the old style bubble type LEDs?

    some came in clusters(arrays), and I suppose there was alpha types.

    I think I have some in my drawers, get back to me if this is what
    you're looking for..

    Jamie
     
  3. Well, not exactly. I believe bubble-type could be used, but they are
    "viewing angle sensitive", and they need multiplexing. And they normally
    have 8-10 digits, and that is far more than I need.

    But thanks for the effort.

    Sincerely/Best regards
    Mads Aggerholm
     
  4. Tilmann Reh

    Tilmann Reh Guest

    What about a small graphical OLED display? You would use only those few
    pixels needed for the digits, the rest of the display becomes the black
    background.
    (I must however confess that I didn't check the availability of such
    displays yet, but it might be an idea...)
    With OLED, you'd get only one color, however.

    Tilmann
     
  5. Nick

    Nick Guest

    Have you looked at HPs vintage 7-segments like HP5082-7430 series yet? Like
    these:



    or here

    http://elabz.com/arduino-nano-and-hp5082-7433-vintage-7-segment-led-display/

    Their digits are 2.8mm hight and you can do a capital "A" and a lowercase "b"
    with 7 segments without a problem. In fact, you can do enough letters for a
    few more tracks, the first letter that does not work with 7 segments is "K".
    But the best feature of those tiny displays is that they have great output at
    only 5mA per segment and can be driven straight from an MCU. And they look
    very retro, too!

    Nice video, BTW, pretty funny.

    Cheers!


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  6. I have forund pictures and descriptions of different displays around the
    web, but the problem is the 'vintage'-part. Those could work fine, but are a
    little hard to come by. I have so far found none that is for sale.
    I could make the letters in an other way, the writing will always be the
    same. Maybe cut out of cardboard and a LED behind it. But the numbers have
    to be displays!
    Thanks very much!

    /Mads
     
  7. I've been looking for those too, HP or agilent discontinued them years
    ago. The last samples I had I somehow broke or lost.

    they "spoke" 4 bit BCD for the alphanumeric versions.
     
  8. Let me know if you find any sources.

    If you really want to go crazy, try to find the 7 segment indicator
    displays that had individual tungesten filaments for each segment. they
    were made like vacuum flourescent displays.

    I last saw them for something like $50 each on the Allied catalog about 20
    years ago.
     
  9. here we go, for really small incandescent indicators!

    check out the KW105S

    http://www.surplussales.com/Bulbs-Incan-Panel/VacDisplay.html

    surplus sales is a very strange place. I went there once.
     
  10. forgot the other link, for the LED display

    http://www.surplussales.com/Bulbs-Incan-Panel/LEDDisplay.html
     
  11. Guest

    On Oct 30, 10:59 am, "Mads Aggerholm"
    Several small displays are shown at
    http://www.decadecounter.com/vta/tubepage.php?item=33

    The DL1414 is has "magnified" height of 0.112". Data sheet at
    http://www.decadecounter.com/vta/pdf2/DL1414.pdf

    The ones in your video appear to be un-magnified (no distortion due to
    the lens), so I am guessing they could be MAN-3 displays.

    Unfortunately, most or all of these are obsolete, and may be difficult
    to obtain. They were the latest technology in the 1970s.
     
  12. Jamie

    Jamie Guest

    you can get chip leds and solder them on a board in the format you wish..

    Jamie
     
  13. I have found the www.decadecounter.com, but the "obsolete"-part is
    definitely the spoke in the wheel.

    No, the ones I use is 5 mm displays, bought in a store.
    But now you mention it, the ones my father had many years ago, actually was
    MAN-4.

    And I can see I asked for "4, max 5 millimeters".
    5 millimeters is easy to obtain, and they are too big. It should be more
    like "3, max 4 millimetres".

    When a model is this small, it takes almost nothing for items to get too
    big.
     
  14. Don't know how many of them do you need but here are some green ones:

    http://www.ebay.com/itm/6x-Vintage-...pt=Vintage_Electronics_R2&hash=item2c68f7f99e

    and red ones:

    http://www.ebay.com/itm/6x-Vintage-...pt=Vintage_Electronics_R2&hash=item2ec07d0d16


    It looks like nobody makes something like these any more. I tried to
    find anything like these of recent manufacturing (I would like to
    purchase bigger quantity, something like a hundred of each color) to no
    avail.

    Those russian ones are pretty decent, I used them a lot when I was
    living in USSR something like 20 years ago.
     
  15. Thanks *very* much!

    I've been trying to find this for months - also on eBay!
    What did you search for on eBay to find these?

    /Mads

    Those russian ones are pretty decent, I used them a lot when I was
    living in USSR something like 20 years ago.
     
  16. I simply check what that guy has for sale from time to time :) He has some
    interesting "old" stuff that is impossible to find anything else. I'm
    buying 2D524 snap-off diodes, 1I308B tunnel diodes, and high-voltage
    rectifiers from him right now... Those are nowhere to be found or you are
    charged arm and leg for something like that.
     
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