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7 segment LED scheme

Discussion in 'Datasheets, Manuals and Component Identification' started by zaska, Jul 16, 2012.

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  1. zaska

    zaska

    3
    0
    Jul 16, 2012
    Hi all,

    I'm pretty new in this area, please don't shoot :)
    I bought the following display:
    Kingbright CA56-11GWA

    The manual is here:
    http://www.ges.cz/sheets/c/ca5611gwa.pdf

    My question is how to connect it. From Dig 1, 2, 3 and 4 I see all the segments (from "a" to "g" plus the DP), but can't see the common pin. Also don't know which pins are for DP5 and DP6 (the dots between the numbers).
    It's 2 x 18 pins. Which means 16 pins (one side) for all the segments, 1 for the DP in the middle and 1 for the common. Just don't know which pin is for what.

    Thanks
     
  2. zaska

    zaska

    3
    0
    Jul 16, 2012
    stupid... now I see the pins for the segments and the common

    But where are the pins for DP5 and DP6?
    (check attachment).
     

    Attached Files:

  3. g4vhg

    g4vhg

    3
    0
    Aug 2, 2012
    Hi if I understand the question right then the common pin for digit 1 is pin 32,
    and the common for digit 2 is pin 31, digit 3 is 23, and digit 4 is 22.
    I hope this is what you wanted.
    Chears
     
  4. GreenGiant

    GreenGiant

    842
    6
    Feb 9, 2012
    Where are DP 5 and DP6?

    I dont see them on the sheet, there is only one DP per digit, and it is 4 digits wide...
     
  5. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Look at the datasheet he linked, DP5-6 are the colon for clock use...

    I suspect there are multiple versions of this display, some with DP5-6 enabled others without and a sloppy datasheet that lacks this detail... That or a reversal of polarity of a few pins (don't asked what ones as it's only a wild guess) might toggle the colon dots...
     
    Last edited: Aug 3, 2012
  6. GreenGiant

    GreenGiant

    842
    6
    Feb 9, 2012
    I looked at that data sheet for like 15 minutes looking for those and never saw them... Im tired...

    Probably reverse like Cola said
     
  7. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Had me confused for a bit as well, and I'm wide awake right now :)
     
  8. davenn

    davenn Moderator

    13,765
    1,920
    Sep 5, 2009
    There are NO DP 5 and 6 its ONLY a 4 digit display lol

    Dave
     
  9. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Sure about that? :p

    [​IMG]
     

    Attached Files:

  10. KJ6EAD

    KJ6EAD

    1,114
    159
    Aug 13, 2011
    I think the colon positions on that model are left unpopulated. I see this a lot on displays. They just forgot to change the drawing.
     
  11. davenn

    davenn Moderator

    13,765
    1,920
    Sep 5, 2009
    time for new glasses :eek:
    my apologies

    ok looking at the datasheet again those 2 DP's are definately not included huh
    doesnt give much creedence to these 2 guys then huh....

    SPEC NO: DSAA3959 REV NO: V.9 DATE: MAY/25/2007 PAGE: 2 OF 4
    APPROVED: WYNEC CHECKED: Joe Lee DRAWN: Y.L.LI


    Dave
     
  12. zaska

    zaska

    3
    0
    Jul 16, 2012
    Hello again and thanks for the replies.

    Maybe I'll talk with the manufacture.
    I'm holding this display in my hand and I see the DP5 and DP6. At the end probably I'll cut it in half :)
     
  13. KJ6EAD

    KJ6EAD

    1,114
    159
    Aug 13, 2011
    You see the space in the frame that's reserved for the LEDs but there are probably no die installed.
     
  14. g4vhg

    g4vhg

    3
    0
    Aug 2, 2012
    Hi again. Yes, you are right the other two centre decimal points are not shown on the pin out.
    Ether they are connected to the lower decimal point or your display has not got them.
    Have a try with a multi meter set to diode test or a low ohms range.
    You should be able to light the each segments up in turn. It will only light them dim as the meter will only have a small current out put.
    Then you will be able to identify what is what. ( Remember to get the polarity the right way or they will not light) .
    Have fun. G4VHG.
     
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