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Strange wiring problem .....anyone???

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  • Strange wiring problem .....anyone???

    I have just recieved my 2nd seiko lm3034 and connected it up, saw the two bars of black then nothing. rebooted the machine still nothing, so I checked all my wiring and it checked out with a meter so the looms ok. Then after much searching I noticed that if I short Vcc with Vss I get a display although it is dim. The pot is 10k which what it say to use on the wiring diagram.

    Now I do remember someone saying that a wrong diagram had been posted, the one I have used is.

    LCD LPT
    1 9
    2 8
    3 7
    4 6
    5 5
    6 4
    7 3
    8 2
    9 1
    10 14
    11 16
    12 center pin on 10k pot
    13 GND
    14 +5
    15 17
    16 not connected
    17 +5
    18 end pin on 100 Ohm pot (other two bridged)

    Win98lite lcdprint and various lcd plugins have been tried
    Hope that is enough info
    Edie209

    http://www.ridgeway.plymouth.sch.uk/majikfish/majikfish.htm

  • #2
    well I bridged Vss and Vcc the other day and all is still working so unless anyone knows a reason for this I think I will leave it as it is.
    Edie209

    http://www.ridgeway.plymouth.sch.uk/majikfish/majikfish.htm

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    • #3
      That is a very differnet wiring pin layout to the Seiko displays I use.....

      I never bothered with the 10K/100K pots on my lcd's.... I find that grounding the contrast pin works great for me......
      Project - GAME OVER :(

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      • #4
        magnetik do you have a copy of your wiring diagram that amybe I could have a look at?
        Edie209

        http://www.ridgeway.plymouth.sch.uk/majikfish/majikfish.htm

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        • #5
          Originally posted by edie209:
          <STRONG>magnetik do you have a copy of your wiring diagram that amybe I could have a look at?</STRONG>
          I dont think it would help..... the displays I use have a 14pin interface - whilst yours has 18pins. I will post the pin layout when I get back to my home pc....
          Project - GAME OVER :(

          Comment


          • #6
            thanks that would be a great help
            Edie209

            http://www.ridgeway.plymouth.sch.uk/majikfish/majikfish.htm

            Comment

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