[Techtoolslist] Designing a 9010 replacement LED display?

Mon Dec 5 15:54:59 EST 2022

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"
>>
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>
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