[Techtoolslist] Designing a 9010 replacement LED display?

William Stillwell ki4swy at gmail.com
Mon Dec 5 15:58:59 EST 2022 

I need to work on a replacement display for my 9110... it's very hard to
read.

On Mon, Dec 5, 2022, 3:56 PM Jose Luiz Martins <joseluizmartins at gmail.com>
wrote:

> He sent me this picture.
>
> Em seg., 5 de dez. de 2022 17:48, Jose Luiz Martins <
> joseluizmartins at gmail.com> escreveu:
>
> > He told-me, he is now working in a new version for regular LCD modules.
> >
> > I'll call him later to ask for the update.
> >
> >
> > JL
> >
> > Em seg., 5 de dez. de 2022 17:34, John Robertson via Techtoolslist <
> > techtoolslist at flippers.com> escreveu:
> >
> >> On 2022/12/05 11:58 a.m., Jose Luiz Martins wrote:
> >> > I know him, he is a very nice guy.
> >> >
> >> > I have one of this kits, it it's very well made. If you guys have
> >> > interesting, I can talk to him to manage a discount for this group.
> >> >
> >> >
> >> > JL
> >>
> >> Thanks for the info.
> >>
> >> Isn't the problem that our friend in Brazil used the Itron fg326
> >> display? Those are kinda hard to come by. So failing turning up a
> >> display, one is looking at a replacement - probably LED.
> >>
> >> John :-#)#
> >>
> >> >
> >> > Em seg., 5 de dez. de 2022 16:53, Tony Jones <tony at tonyjones.com>
> >> escreveu:
> >> >
> >> >> I assume you guys saw this:
> >> >>
> >> >>
> >>
> https://forums.arcade-museum.com/threads/the-fluke-9010a-club.97717/post-4432860
> >> >>
> >> >> On Mon, Dec 5, 2022 at 11:08 AM Brad Gass via Techtoolslist <
> >> >> techtoolslist at flippers.com> wrote:
> >> >>
> >> >>> I guess I hadn't looked at dot matrix displays because of the cost,
> >> but
> >> >>> they certainly seem feasible from a technical standpoint.  From UT
> >> >> Source,
> >> >>> the 3416 size red displays are still a lot more than an LCD, but at
> >> >> ~$21.14
> >> >>> each, are certainly more reasonable than from Newark.
> >> >>>
> >> >>> Although I wouldn't fuss over a red versus green display if red were
> >> >> lower
> >> >>> cost, I did put in an inquiry on the DLG3416 (green) Osram version
> of
> >> >> that
> >> >>> display, which would more closely match the Fluke's look.  Awaiting
> a
> >> >> quote.
> >> >>> So, the question is really - retrofit the existing board with a
> >> mezzanine
> >> >>> type board (if feasible), or a full-on redesign of the board?
> Anyone
> >> >> know
> >> >>> if there is enough 5V rail current headroom to support up to another
> >> 1A
> >> >> of
> >> >>> draw (worst case)?  I suspect the safest bet would be to create a
> new
> >> 5V
> >> >>> supply for the character modules from the +55V rail used to provide
> >> power
> >> >>> to the VFD.
> >> >>>
> >> >>> Thanks,
> >> >>>
> >> >>> --Brad
> >> >>>
> >> >>> ----- Original Message -----
> >> >>> From: "Technical Tools Mail List" <techtoolslist at flippers.com>
> >> >>> To: "Technical Tools Mail List" <techtoolslist at flippers.com>
> >> >>> Cc: "John Robertson" <jrr at flippers.com>
> >> >>> Sent: Sunday, December 4, 2022 12:51:39 AM
> >> >>> Subject: Re: [Techtoolslist] Designing a 9010 replacement LED
> display?
> >> >>>
> >> >>> On 2022/12/01 8:37 p.m., Brad Gass wrote:
> >> >>>> There doesn't appear to be small-pitch alphanumeric LED displays
> >> >>>> available (at least that I could find) that would work here without
> >> >>>> being much too large for the space. There are a couple Noritake
> Itron
> >> >>>> graphic VFD's that might work, but those are going to be expensive,
> >> >>>> and don't appear readily available either.
> >> >>>>
> >> >>>> I think what might be a workable approach would be to use a 40x1
> >> >>>> character LCD module with a reasonably bright backlight. There seem
> >> to
> >> >>>> be a couple models pretty readily available on the surplus market
> >> that
> >> >>>> may work out. It's not perfect, and the surplus displays may or may
> >> >>>> not support "inverted" displays (light text on black background),
> but
> >> >>>> anything is a lot better than nothing if you have a bum display!
> But
> >> >>>> no matter what the approach, additional design effort would be
> needed
> >> >>>> to capture the segment drive data for each character, decode it
> into
> >> >>>> character data for the LCD, then output it to the LCD module.
> >> >>>>
> >> >>>> In looking at pictures of the display PCB, this may be
> retrofit-able
> >> >>>> on the existing board with a bit of clever craftsmanship. From the
> >> >>>> schematic, abandon U3 through U10 in place, pick off character
> clock
> >> >>>> (U6 pin 9) and data (U6 pin 7) from the head of the character drive
> >> >>>> shift register chain, and get segment clock (U13 pin or U14 pin 3)
> >> and
> >> >>>> data (U13 pin 2 *and* U14 pin 2) from the segment drive shift
> >> >>>> registers. Decode the captured data into ASCII (or custom)
> >> characters,
> >> >>>> then send them out to the LCD, updating only the LCD character
> >> >>>> positions that change between VFD "refresh cycles" to keep the LCD
> >> >>>> character flicker to a minimum.
> >> >>>> Does anyone know the full "character map" of the 9010? As near as I
> >> >>>> can recall, it's all standard ASCII characters but I honestly don't
> >> >>>> remember if there was any oddball symbols that might need to be
> >> mapped
> >> >>>> to custom characters on the LCD. I've been busy with other life
> >> issues
> >> >>>> and away from the bench for much too long now, but wouldn't mind
> >> >>>> working at this a bit if there were others interested in helping
> out.
> >> >>>>
> >> >>>> --Brad
> >> >>> I did find what appears to be a suitable LED display module, that
> will
> >> >>> fit in the space, but we need 8 of them and they cost around $36US
> >> each:
> >> >>>
> >> >>>
> >> >>>
> >> >>
> >>
> https://www.newark.com/broadcom/hdlo-3416/led-alphanumeric-display-dot-matrix/dp/36AJ9396
> >> >>> 8 of them is just over 6.5 inches, and the original space is around
> >> 6.75
> >> >>> inches. Height is 0.274" or close enough to the original 0.3"
> >> >>> fluorescent digit.
> >> >>>
> >> >>> They are ASCII coded, and even have 8 user defined characters
> >> available.
> >> >>>
> >> >>> Not so cheap, but with a bit of logic glue possibly a worthwhile fix
> >> >>> considering the 9010 is worthless without a display...
> >> >>>
> >> >>> John :-#)#
> >> >>>
> >> >>>> ----- Original Message -----
> >> >>>> From: "Technical Tools Mail List" <techtoolslist at flippers.com>
> >> >>>> To: "Technical Tools Mail List" <techtoolslist at flippers.com>
> >> >>>> Cc: "John Robertson" <jrr at flippers.com>
> >> >>>> Sent: Thursday, December 1, 2022 7:47:51 PM
> >> >>>> Subject: [Techtoolslist] Designing a 9010 replacement LED display?
> >> >>>>
> >> >>>> I was looking at my 9005 and grumbling because the tube is missing,
> >> >> then
> >> >>>> I pulled out the 9010a service manual and you know, it looks like
> it
> >> >>>> would be a pretty easy fix to replace the tube with 32 digit
> >> >>>> alpha-numeric LEDs of the correct size on a small PCB and all that
> >> >> would
> >> >>>> be needed is to replace the UDN6118 fluorescent drivers with
> suitable
> >> >>>> LED drivers and find a place to grab 5V and ground and then mount
> the
> >> >>>> new display to the board...
> >> >>>>
> >> >>>> Maybe it would work?
> >> >>>>
> >> >>>> Anyone interested in poking at the KiCAD layout? I have no free
> time,
> >> >>>> but I know there are folks out there looking for a solution to bad
> or
> >> >>>> weak tubes...
> >> >>>>
> >> >>>> Here is the page:
> >> >>>>
> >> >>
> >>
> ftp://ftp.flippers.com/TTL/Test_Equipment/Fluke/9010%20Series/9010_Fixture%20PDFs/9010A_Display_Schematic.pdf
> >> >>>> <
> >> >>
> >>
> ftp://ftp.flippers.com/TTL/Test_Equipment/Fluke/9010%20Series/9010_Fixture%20PDFs/9010A_Display_Schematic.pdf
> >> >>>>
> >> >>>> John :-#)#
> >> >>>>
> >>
> >> --
> >>                   John's Jukes Ltd.
> >> 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
> >> Call (604)872-5757 (Pinballs, Jukes, Video Games)
> >>                   flippers.com
> >>   "Old pinballers never die, they just flip out"
> >>
> >> _______________________________________________
> >> Techtoolslist mailing list
> >> Techtoolslist at flippers.com
> >> https://pairlist7.pair.net/mailman/listinfo/techtoolslist
> >> FTP site is: ftp://ftp.flippers.com/TTL/Test_Equipment
> >> Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
> >>
> >
> _______________________________________________
> Techtoolslist mailing list
> Techtoolslist at flippers.com
> https://pairlist7.pair.net/mailman/listinfo/techtoolslist
> FTP site is: ftp://ftp.flippers.com/TTL/Test_Equipment
> Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
>

More information about the Techtoolslist mailing list