1in 2 digit sisplay

Discussion in 'The Projects Forum' started by aka-rato, May 30, 2012.

  1. aka-rato

    Thread Starter Member

    May 11, 2012
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    helo...:)

    is.t possible to use only ist digit display on a 2 digit display 7 segment?
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    Yes, but please post the model number of the display.
     
  3. aka-rato

    Thread Starter Member

    May 11, 2012
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    0
    i want 2 use kingbright-DA56-11EWA as a sigle digit display
     
  4. absf

    Senior Member

    Dec 29, 2010
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    To use the 1st digit, you can use pin 1,2,3,4,15,16,17,18 for the segments and pin 14 is the common anode pin. See the picture attached and it would explain itself.

    Allen
     
  5. aka-rato

    Thread Starter Member

    May 11, 2012
    58
    0
    hey
    i tried that but nothing is happening. any idea please
     
  6. absf

    Senior Member

    Dec 29, 2010
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    can you show us your schematics or connections?

    Allen
     
  7. aka-rato

    Thread Starter Member

    May 11, 2012
    58
    0
    i do not have a 1 digit display hence im using a 2 digit.
     
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  8. absf

    Senior Member

    Dec 29, 2010
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    Your circuit uses a common cathode LED while your 2 digit 7 seg LED is a common anode one. In order to use it in your circuit, you have to connect the common anode to +5V and all the segments a-g have to be inverted with either npn transistors, or a ULN2003A or 2x 4069 inverter gates.

    I'd say it is easier to just buy a common cathode LED and forget about the mod. But if you insist to use the LED you have, I can draw up the schematic but it would take time.

    Or you can wait and see what others here have to say about it....:p

    Allen
     
    Last edited: May 31, 2012
  9. MrChips

    Moderator

    Oct 2, 2009
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    Skip the dual digit display and install a single display of the proper configuration.
     
  10. aka-rato

    Thread Starter Member

    May 11, 2012
    58
    0

    U R right thanx... lol i did'nt notice that.
     
  11. aka-rato

    Thread Starter Member

    May 11, 2012
    58
    0
    thank u guyz u r saving me a stress..
     
  12. aka-rato

    Thread Starter Member

    May 11, 2012
    58
    0
    hey Absf

    please hook me up with that circuit so that i can still use my Led..
     
  13. absf

    Senior Member

    Dec 29, 2010
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    OK here's your circuit..:cool:

    Allen
     
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  14. aka-rato

    Thread Starter Member

    May 11, 2012
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    Thanx im working on it now.
     
  15. aka-rato

    Thread Starter Member

    May 11, 2012
    58
    0
    You are a star...:) thank you so much, my circuit is working so perfect and im so going to sleep @ night.:):)
     
  16. absf

    Senior Member

    Dec 29, 2010
    1,492
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    Glad to hear that.... Allen
     
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