[Techtoolslist] Designing a 9010 replacement LED display?

Mon Dec 5 15:48:40 EST 2022

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"
>
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