LED Display

Discussion in 'General Electronics Chat' started by lmartinez, Jul 12, 2009.

  1. lmartinez

    Thread Starter Active Member

    Mar 8, 2009
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    Hello Everyone,

    I was not able to find the the data sheet for the LED Display C8021-11. Does anyone know of where I may be able to find the data sheet for it.I am working on a LED Counter, Multiplexing home project. Thank you in advance
     
  2. SgtWookie

    Expert

    Jul 17, 2007
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  3. lmartinez

    Thread Starter Active Member

    Mar 8, 2009
    224
    6
    Thank you for the information you provided. Please provide any information that would lead me to locate the data sheet for such item. Thank you:)
     
  4. SgtWookie

    Expert

    Jul 17, 2007
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    On this page:
    http://www.linux-cae.net/PCB/gvsu.edu.steriana.html
    there is a link to these zipped Eagle parts libraries:
    http://claymore.engineer.gvsu.edu/~steriana/courses/Downloads/adslbr.zip

    and on the page the professor claims that there is a layout for REFAC C8021-11 7-segment LED displays; I didn't find a C8021-11 but I did find an LN514RK, which apparently has the same pinout.

    A datasheet for the LN514RK can be found here:
    http://www.datasheetcatalog.com/datasheets_pdf/L/N/5/1/LN514RK.shtml

    According to the Eagle layout, pins are as follows (14 pin package, missing pins 4 and 12)
    1 - a
    2 - b
    3 - c
    4 - (missing)
    5 - d
    6 - e
    7 - f
    8 - g
    9 - h
    10 - not documented
    11 - not documented
    12 - (missing)
    13 - not documented
    14 - common cathode

    So, one of pins 10, 11, or 13 must be a decimal point, and I suspect that there is another common cathode connection somewhere.

    However, this doesn't agree with the datasheet. The only two pins they agree on is that pin 1 is segment a, and pin 14 is the common cathode. You'll have to figure the rest out for yourself.
     
    Last edited: Jul 12, 2009
  5. lmartinez

    Thread Starter Active Member

    Mar 8, 2009
    224
    6
    Thank you very much for the time taken to provide the given information. I did try to figured out the pin connections but there were some pins that I was not able to determine what their functionality is for. I used my power supply and the appropriate current limiting resistors to light the LED s but the out come was not a success. Thank you
     
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