Connect with us

Looking for 7 segment LED display

Discussion in 'Hobby Electronics' started by David, Oct 2, 2005.

Scroll to continue with content
  1. David

    David Guest

    I have a Keithley digital microvoltmeter which has a fault in one of its red
    LED display digits. The part is a Fairchild FND561 which is no longer
    available. I am having trouble finding a replacement and would appreciate
    any suggestions in finding an equivalent, though I'd reckon siomething
    should be available.

    The display is the leading digit which displayes +/- 1. It is a 13mm DIP
    package.

    As it has both the 1 and the sign of the signal, its absence makes the meter
    of limited use!
    Any suggestions greatly appreciated.
    Dave
     
  2. budgie

    budgie Guest

    Check the pinout against other 1/2" common cathode types. You will probably
    find the pinout is rather standardised.
     
  3. T.T.

    T.T. Guest

    The meter would be slightly more useful if you swapped the high-order and
    low-order digits.

    But not much.
     
  4. Peter Howard

    Peter Howard Guest

    Now Components, http://www.nowcomponents.com/index.cfm in Fla., USA claim to
    have 595 of them in stock. They specialise in "hard to find, long lead time,
    end of life and obsolete components" , take all the major plastic and I've
    dealt with them once before. You could enquire using their online form to
    see if they really have them. Depends on how badly you want the part.

    PH
     
  5. David

    David Guest

    Thanks Peter,

    I need one of them . . And US500 minimum IS a bit on the high side . I could
    buy a new instriment for that price.

    Problem is that I can't seem to find the "+/-1." configuration elsewhere. .
    Plenty of comparable 7-segment digits, but none like this yet.

    Thanks for the suggestion.

    Dave
     
  6. Phil Allison

    Phil Allison Guest

    "David"

    ** You ARE a fussy so and so.

    Who the hell needs to see a " + " sign ???????

    Millions of digital displays do fine with just a " - " sign using the
    middle bar of a seven segment display. The absence of " - " is taken as
    being " + " by default.

    Capice?

    Nearly any 13mm LED display will get that old Keithley going.




    ......... Phil
     
  7. David

    David Guest

    Now THAT is thinking . . Thanks Phil. . (in any case I guess a 1 isn't all
    THAT important in the scheme of things!)

    I'll give it a try as I have some (wrong colour) 13mm displays. Make sense
    and might get me out of a fix. I wonder if it IS that simple?

    Dave
     
  8. Phil Allison

    Phil Allison Guest

    "David" <

    ** Top posting hotmailer, Dave, might be smarter to invest in a screwdriver
    before wasting his dough on a LED display.



    ........... Phil
     
  9. dmm

    dmm Guest

    Are you in Melbourne Dave?

    If so, Rockby in Clayton have a surplus store next door to their shop which has
    various LED displays, I think I saw one similar to your requirements recently.
     
  10. David

    David Guest

    Thanks - but I'm in Brisbane. I was unaware of Rockby - they are worth
    knowing about though. Thanks for the suggestion.

    Dave
     
  11. Ross Herbert

    Ross Herbert Guest

    I have 2 off MAN73A http://www.fairchildsemi.com/pf/MA/MAN73A.html if
    these are any use.

    Ross Herbert
     
  12. Franc Zabkar

    Franc Zabkar Guest

    Would an NTE3076 (CA) or NTE3077 (CC) be suitable?
    http://www.users.on.net/~fzabkar/NTE_LED_displays/NTE3076-7.JPG

    Both are ".560 inch, 7 segment, 1 digit with overflow and +/-, RH
    decimal point".

    The going price in single quantities appears to be ~US$5.

    These data (pinouts, package dimensions, specs) from my old NTE
    catalogue might be of some help in comparing displays:
    http://www.users.on.net/~fzabkar/NTE_LED_displays/

    -- Franc Zabkar

    Please remove one 'i' from my address when replying by email.
     
  13. StasLesov200

    StasLesov200

    1
    0
    Sep 6, 2010
    À ìóæèêè-òî íå çíàþò :)
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-