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Re: boards and kits and stuff
Bill, My system is working and without freeze-ups, but I will try out your board. Al
By Albert Peter · #33113 ·
Re: boards and kits and stuff
I believe that this is the "correct" solution.
By John G0SDF · #33112 ·
Re: boards and kits and stuff
I have both M and C parts, but it doesn¡¯t seem to make a difference. If there is a software fix for this, I really wonder why someone hasn¡¯t done it. There are posts all over the PRJC site about
By K9HZ · #33111 ·
Re: boards and kits and stuff
I hope you got the M version.? The C version is only specified to 25 MHz. Also, remember there is a potential software solution to boost the Teensy drivers. That will require drilling into the device
By Greg KF5N · #33110 ·
Re: boards and kits and stuff
I use these ferrite sleeves for ribbon cables. Seems to work FB. Tim W4YN
By Tim · #33109 ·
Re: boards and kits and stuff
Another wacky, but successful solution is to hand wire the display with the SPI signals separated by the ground/power lines.? I used the following order successfully on an 8.5" cable: 1. SCLK (gray)
By Terrance Robertson, KN6ZDE · #33108 ·
Re: boards and kits and stuff
Well, the ISO7241 is a specially designed SPI buss buffer/ isolator/ driver chip¡­, it plugs into the T41 display socket on the main board (close to the Teensy) and the display cable plugs into it.
By K9HZ · #33107 ·
Re: boards and kits and stuff
Hi Bill- Is your board placed at the display end?? It seems like it is more of a "buffer board" rather than a driver board, if so. I'm trying to visualize why it works. -- 73 Greg KF5N
By Greg KF5N · #33106 ·
Re: boards and kits and stuff
The driver board seems to extend that to 6 feet (I can only measure the effect on a scope, not with the display)¡­ someone else will give me the real story. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK
By K9HZ · #33105 ·
Re: boards and kits and stuff
I've continued my T41 v12 display experiments.? A 9mm clamp-on ferrite worked with my 5.5" ribbon cable. It didn't work with the 11" or 15" cables I had on hand to test.? So somewhere between 6" and
By Terrance Robertson, KN6ZDE · #33104 ·
Re: boards and kits and stuff
I have a 5V display.
By Terrance Robertson, KN6ZDE · #33103 ·
Re: boards and kits and stuff
Ok expect it. Is you display set up for 5V or for 3V? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois
By K9HZ · #33102 ·
Re: boards and kits and stuff
Sure, I'll test one.? Thanks!
By Terrance Robertson, KN6ZDE · #33101 ·
Re: boards and kits and stuff
Ok I¡¯ll send you one too¡­ Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner ¨C Operator Villa
By K9HZ · #33100 ·
Re: boards and kits and stuff
My rig with 7" display is working ok for most part. (PA needs some tweaking) I have a 6" ribbon cable but it has ferrite sleeve. It was freezing up but that was several FW versions ago. I can try the
By Tim · #33099 ·
Re: boards and kits and stuff
Would you like to test out one of these display drivers (FREE)¡­? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC
By K9HZ · #33098 ·
Re: boards and kits and stuff
I have a v12 Main board where the 5-volt display works with a 3.5" cable but fails with a 5" cable.? I've done some experiments.? The display works if the ribbon cable wires are separated.? I've
By Terrance Robertson, KN6ZDE · #33097 ·
Re: boards and kits and stuff
Ok yep looking for someone that is using a short cable that can expand a bit to test this out. If all else fails, I¡¯ll send one to Al, because I know he will be curious¡­ Dr. William J. Schmidt -
By K9HZ · #33096 ·
Re: boards and kits and stuff
That can work! Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner ¨C Operator Villa Grand Piton ¨C
By K9HZ · #33095 ·
Re: boards and kits and stuff
Wait a minute, Bill: my system at the present time does not freeze up, so that might not do you any good. Jack, W8TEE
By jjpurdum · #33094 ·