Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 27
  1. #11
    500+ This must be a daytime job



    Join Date
    Jul 2013
    Posts
    917
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    David

    Not totally random the first digit is always correct and the third is correct most of the time. I am assuming that you have used the opencockpit pcb`s to hold the 7 seg displays and that connections for both the 7 seg displays elements and the digit select are in accord with the documents on the OC site.

    If so, then the suspicion falls upon the 40 way connector cable. If you are confident that the above connections are ok, then if you have a multi meter I suggest you check the continuity on the 40 way cable. I have known intermittent faults when the connectors have been poorly crimped

    David

  2. #12
    25+ Posting Member
    Join Date
    Feb 2012
    Location
    Perth, Perth and Kinross, United Kingdom
    Posts
    37
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    John
    unfortuneately not always the first digit is right... not when the values are changing
    I have checked the 40 way cable against continuity and shorts.. each and every cable of the 40
    I also double checked my LEDs connections for every segment of the displays to the display card and it is 100% right.

    When i connected the lot for the very first time yestrday the 40 way cable I used had an internal rail which was short cirquiting 6 out of the 40.. when i discovered it I changed the cable to a new on which is tested and 100% working

    I wonder if these shorts on the 40 way cable i used could damage the displays or master card.. :/

  3. #13
    500+ This must be a daytime job



    Join Date
    Jul 2013
    Posts
    917
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    David

    Just returned from the pub and saw your post. Sadly, on the basis of what we know so far, I can add little except to agree that the shorting of the original cable may be the cause of your problems. I hope not, perhaps some further step by step diagnostics eg testing one digit at a time under varying circumstances may help

    Good luck

    David (not John)

  4. #14
    150+ Forum Groupie


    Perik's Avatar
    Join Date
    Aug 2007
    Location
    NORWAY
    Posts
    193
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    David

    What kind of PowerSupply do you use?
    and have you tested the Input and Outputs on
    your MasterCard (All of them).

    BTW - You'll find some nice information here:
    Regards,
    Per-Erik
    www.hoddo.net

  5. #15
    25+ Posting Member
    Join Date
    Feb 2012
    Location
    Perth, Perth and Kinross, United Kingdom
    Posts
    37
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    Oh, beg your pardon David
    Thanks for all your help, I shall keep on testing, if nothing works I will either have to buy new master and displays card or just the IC's which should be cheaper..

  6. #16
    25+ Posting Member
    Join Date
    Feb 2012
    Location
    Perth, Perth and Kinross, United Kingdom
    Posts
    37
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    Hi
    I am using a dedicated, switching power supply rated at 5V ; 1A
    as for the inputs and outputs I tested few at random on each connector, but i will test all of them and let you know what I found

    David

  7. #17
    500+ This must be a daytime job



    Join Date
    Jul 2013
    Posts
    917
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    David

    To completely isolate any "software" interference, I suggest you compile a simple script just defining the variable for one digit and change the value in iocpconsole to see what happens

    David

  8. #18
    25+ Posting Member
    Join Date
    Feb 2012
    Location
    Perth, Perth and Kinross, United Kingdom
    Posts
    37
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    Tested all inputs and outputs
    they all work...

  9. #19
    25+ Posting Member
    Join Date
    Feb 2012
    Location
    Perth, Perth and Kinross, United Kingdom
    Posts
    37
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    David
    I tried the script with IOCP console and any number i send arrives at the display inverted as in
    0 instead of 1
    1 instead of 0
    5 instead of 6
    6 instead of 5 and so on...
    wonder what does it mean
    at least all of the ins and outs on master card work so if need be I will only have to buy new displays card

  10. #20
    25+ Posting Member
    Join Date
    Feb 2012
    Location
    Perth, Perth and Kinross, United Kingdom
    Posts
    37
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Random digits on 7 segmen display Problem - Please, Please help

    Just an update..
    ordered new pic and pic programmer, see if that solves the problem

Page 2 of 3 FirstFirst 123 LastLast