7-Seg 4-Digit LED display pinout

Discussion in 'Electronics Resources' started by abuhafss, Sep 12, 2018.

  1. abuhafss

    Thread Starter Senior Member

    Aug 17, 2010
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    3
    Hi

    I shall be grateful if anybody can help me out with the pinout of 7-Segment 4-Digit LED display bearing part number CSQ-4246G 05. I tried to google it but could not find much information.

    20180912_130756.jpg
     
  2. ericgibbs

    Moderator

    Jan 29, 2010
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  3. abuhafss

    Thread Starter Senior Member

    Aug 17, 2010
    181
    3
    Thanks for the response.

    If I am not wrong usually there are 12 pins but here we have 13 pins.
    What does D0V pin stands for?
    Besides, the module shows digit "1" corresponding to rightmost pin. But the diagram does not shows the pin numbers.

    2018-09-12.png
     
  4. ericgibbs

    Moderator

    Jan 29, 2010
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    hi,
    Thats a good question.
    Both the diagram and your photo images show 13 pins.
    Usually D0 is the least significant Digit Enable
    I would suggest you build a simple test jig, as per your last diagram, you should be able to identify the DOV function.
    E
     
  5. abuhafss

    Thread Starter Senior Member

    Aug 17, 2010
    181
    3
    I already did the test. Here are findings for my displays, maybe helpful for somebody.

    It's a COMMON-ANODE module

    Pin 1 - DOV
    Pin 2 - D1
    Pin 3 - D2
    Pin 4 - D3
    Pin 5 - D4
    Pin 6 - Semi-colon*
    Pin 7 - G
    Pin 8 - F
    Pin 9 - E
    Pin 10 - D
    Pin 11 - C
    Pin 12 - B
    Pin 13 - A

    * Upper dot of the semi-colon activates with D3 and lower one with D4
     
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  6. dl324

    AAC Fanatic!

    Mar 30, 2015
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    What did your testing show when you were testing the DOV pin? It appears to be treated like a common anode in the schematic.
     
  7. abuhafss

    Thread Starter Senior Member

    Aug 17, 2010
    181
    3
    Frankly speaking, I could not solve the D0V pin.
    I could not find any LED activity while powering it thru a resistor and connecting the ground to the remaining pins alternately.
    I would be glad to hear about it for the sake knowledge.
     
  8. dl324

    AAC Fanatic!

    Mar 30, 2015
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    If the pin doesn't do anything, I'd just ignore it.

    If you can't stand not knowing, search for the datasheet (I did for a few minutes and it wasn't worth more time), or try contacting the manufacturer.

    It's always possible that it was a customized part for a particular manufacturer.

    I have some dual digit seven segment displays installed on a small PCB. It turned out it was a custom part that is actually only a digit and a half (most significant digit can only display 1).
     
  9. abuhafss

    Thread Starter Senior Member

    Aug 17, 2010
    181
    3
    Since I had identified the pins of the module, I didn't bothered much about the D0V pin.

    I was bit curios because maybe sometime in future I have to deal with it.
     
  10. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    The DOV might be the common for the blocks on the edges of the display.

    Bertus
     
  11. abuhafss

    Thread Starter Senior Member

    Aug 17, 2010
    181
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    If so, then shouldn't there be some LED activity while testing?
     
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