[Techtoolslist] Designing a 9010 replacement LED display?
John Robertson
jrr at flippers.com
Thu Feb 8 19:42:47 EST 2024
On 2022/12/05 3:10 p.m., Jose Luiz Martins wrote:
> I'll send one 9010 that I have as a spare to him.
> This way, He can make the appropriate measurements and design a board
> that fits on a regular 9010.
>
> JL
Hi Jose,
Did your friend ever get the 9010 displays ready for sale?
Thanks!
John :-#)#
>
> On Mon, Dec 5, 2022 at 6:24 PM John Robertson via Techtoolslist
> <techtoolslist at flippers.com> wrote:
>
> On 2022/12/05 12:54 p.m., Jose Luiz Martins wrote:
> > He sent me this picture.
>
> That looks pretty good. Those modules are pretty reasonably priced
> too.
> Might be a good solution, plus one can buy a spare or two tubes
> for the
> future if they ever fail...
>
> Does your friend say if he knows if this will fit in a regular
> 9010/9005
> box? Of course he doesn't have one of the units, does he, so not
> sure if
> he can answer that...
>
> Thanks!
>
> John :-#)#
>
> >
> > 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 :-#)#
> > >>>>
> >
>
--
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7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
Call (604)872-5757 (Pinballs, Jukes, Video Games)
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