Results 11 to 20 of 27
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02-18-2012, 02:47 PM #11
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- Jul 2013
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- 917
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
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02-18-2012, 04:03 PM #12
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- Feb 2012
- Location
- Perth, Perth and Kinross, United Kingdom
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- 37
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.. :/
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02-18-2012, 06:32 PM #13
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- Jul 2013
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- 917
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)
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02-18-2012, 07:19 PM #14
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:
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02-19-2012, 07:26 AM #15
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- Feb 2012
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- Perth, Perth and Kinross, United Kingdom
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- 37
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..
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02-19-2012, 07:30 AM #16
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- Feb 2012
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- Perth, Perth and Kinross, United Kingdom
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- 37
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
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02-19-2012, 07:52 AM #17
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- Jul 2013
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- 917
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
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02-19-2012, 09:17 AM #18
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- Feb 2012
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- Perth, Perth and Kinross, United Kingdom
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- 37
Re: Random digits on 7 segmen display Problem - Please, Please help
Tested all inputs and outputs
they all work...
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02-19-2012, 11:04 AM #19
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- Feb 2012
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- Perth, Perth and Kinross, United Kingdom
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- 37
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
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02-22-2012, 01:32 PM #20
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- Feb 2012
- Location
- Perth, Perth and Kinross, United Kingdom
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- 37
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
Enter and win!
JeeHell FMGS on a remote Computer